OBD-II Code B1297: A Guide to Two Different Problems

What Does B1297 Mean?

OBD-II code B1297 is a manufacturer-specific code with two distinct definitions. For Chrysler-family vehicles (Dodge, Ram, Jeep, Chrysler), it signals a fault with the inner driver-side rear parking sensor, officially known as 'PTS Sensor 10'. For Ford, Lincoln, and Mercury vehicles, it indicates a 'Power Door Lock Circuit Failure', pointing to an electrical problem in the door locking system.

Technical definition: The SAE/ISO J2012 standard reserves B-codes (Body codes) for manufacturer-specific use. For Chrysler/Dodge/Ram/Jeep, it is defined as 'PTS Sensor 10 Circuit Fault'. The Park Assist Module (PAM) monitors the ultrasonic sensor and sets this code when the return signal is missing, distorted, or shows an electrical fault. For Ford Motor Company vehicles, it is defined as 'Power Door Lock Circuit Failure', set by the Body Control Module (BCM) when it detects an unexpected voltage condition or an open circuit in the door lock actuator system.

Can I Drive With B1297?

✅Yes. The vehicle is safe to drive. This code affects convenience features like the park assist system or power door locks, not the engine, transmission, or core safety systems. You must be cautious when reversing or manually lock your doors, but the vehicle remains fully operational.

Common Causes

• Obstructed or Dirty Park Assist Sensor (Chrysler-Family) (Very Common) — This is the primary cause for the B1297-25 suffix. Mud, snow, ice, heavy rain, or thick dirt on the face of the inner driver-side rear sensor blocks or distorts the ultrasonic signal. Debris accumulating behind the bumper around the sensor body also triggers this fault.
• Faulty Door Lock Actuator (Ford-Family) (Common) — The small electric motor inside the door that physically moves the lock is the most frequent failure point in Ford's power lock system. The motor burns out, internal gears strip, or electrical contacts fail, leading to a circuit fault.
• Faulty Park Assist Sensor (Chrysler-Family) (Common) — The sensor fails internally due to age, moisture intrusion, or electronic breakdown. Confirm this by swapping the sensor with an adjacent one to see if the code follows the sensor.
• Damaged Wiring or Connectors (Both) (Common) — For Chrysler products, the harness behind the rear bumper gets pinched, cut by road debris, or corroded. The main 24-way connector (XY630A) behind the driver's rear wheel well liner is highly vulnerable to moisture. For Fords, wires in the flexible door jamb boot break from repeated opening and closing. Loose or unseated sensor connectors also fall into this category.
• Faulty Park Assist Module (PAM) Software (Chrysler-Family) (Less Common) — The Park Assist Module's software calibration is sometimes overly sensitive, causing false B1297-25 DTCs for sensor waveform failures. Chrysler issued Technical Service Bulletins (TSBs) like 08-082-20 and 08-047-19 to address this by reprogramming the PAM.
• Blown Fuse or Faulty Relay (Ford-Family) (Less Common) — A blown fuse for the door lock system cuts all power, causing all locks to fail simultaneously. A faulty relay prevents the actuators from receiving the signal to lock or unlock.
• Low or Failing Vehicle Battery (Chrysler-Family) (Rare) — A weak battery causes electronic modules, including the Park Assist Module, to behave erratically. This leads to false codes or an unresponsive system, particularly on the Chrysler Pacifica.
• Faulty Park Assist Module (PAM) (Chrysler-Family) (Rare) — The control module for the parking system rarely fails. It is frequently misdiagnosed when the actual problem lies with sensors or wiring. Rule out all other possibilities before replacing the module.

Symptoms

• 'Service Park Assist' Message (Chrysler-Family) — A warning message appears on the instrument cluster display, accompanied by a single chime, when shifting into reverse.
• Park Assist System Inoperative (Chrysler-Family) — The system produces no beeps or warnings when backing up. The 'OFF' light on the park assist button stays illuminated, and the system cannot be manually re-engaged.
• Power Door Locks Not Working (Ford-Family) — One or all power door locks fail to respond to the interior switch, key fob, or keyless entry pad.
• Buzzing or Clicking from Door (Ford-Family) — A rapid buzzing or clicking noise from inside a door when pressing the lock button indicates a failing door lock actuator with stripped internal gears.
• Automatic Braking When Reversing (Chrysler-Family) — On vehicles equipped with ParkSense Active Park Assist with Stop, a faulty sensor causes the vehicle to brake suddenly and unexpectedly when reversing by falsely detecting an immediate obstacle.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this code.

Common Fixes & Costs

• Clean Park Assist Sensor (Chrysler-Family) — Parts: $0, Labor: $0, ~0.1 hr book time (DIY)
• Replace Park Assist Sensor (Chrysler-Family) — Parts: $20-$80 (Aftermarket) / $90-$150 (OEM), Labor: $50-$125, ~0.8 hr book time (DIY)
• Replace Door Lock Actuator (Ford-Family) — Parts: $50-$150, Labor: $150-$300, ~2.2 hr book time (Intermediate)
• Repair Damaged Wiring — Parts: $10-$50, Labor: $125-$300, ~2.0 hr book time (Professional)
• Reprogram Park Assist Module (PAM) — Parts: $0, Labor: $100-$200, ~1.0 hr book time (Professional)

Used vs. New Parts: Buying Guide

When a used part is worth it: A used door lock actuator from a low-mileage donor is viable for high-mileage vehicles on a strict budget. Never buy used park assist sensors; new aftermarket parts are too cheap to justify the risk.

Donor-vehicle mileage cap: roughly under 60000 miles for the part to have meaningful remaining life.

Donor quality checklist:

• Verify the donor vehicle part number matches exactly.
• Prefer actuators from rear doors, which experience significantly less wear than front doors.
• Reject electronic parts showing corrosion, water damage, or cracked plastic housings.

Decision logic:

• If Part is a park assist sensor → Buy new aftermarket. The $20 savings isn't worth the risk of premature failure.
• If Part is a door lock actuator AND you are paying a shop for labor → Buy new (OEM or Dorman) to secure a warranty and avoid paying $200 in labor twice if the used part fails.
• If Vehicle has >150K miles AND you are doing the labor yourself → A used door lock actuator is a smart budget choice.

Warranty tradeoff: Used parts offer 30-90 day warranties. New aftermarket parts include 1-year to lifetime warranties. New OEM parts carry 1-2 year warranties.

Worst-case if a used part fails: $200-$400 if a used door lock actuator fails, as you must repeat 2 hours of labor.

What Happens If You Wait — Timeline

1. 0-1 month: Chrysler: Intermittent 'Service Park Assist' message after rain. Ford: Occasional buzzing from a door lock actuator; lock is slow to respond. (MPG impact: 0%% · Added cost: $0)
2. 1-3 months: Chrysler: System is completely inoperative. Ford: Door lock fails consistently, requiring manual key use. Buzzing stops as the motor dies. (MPG impact: 0%% · Added cost: $0)
3. 3-6 months: Chrysler w/ Active Park Assist: Faulty sensor causes sudden, unwanted braking when reversing. Ford: Failed actuator causes intermittent parasitic battery drain. (MPG impact: 0%% · Added cost: $0 - $500 (for minor bumper damage from false braking))
4. 6+ months: Persistent parasitic draw from a shorted wire or failed module drains the battery overnight, requiring jump starts or replacement. (MPG impact: 0%% · Added cost: $150 - $350 (for a new battery and diagnostic time))

Cost of Not Fixing It

• Immediate: Loss of parking sensor functionality or power lock convenience. Increased risk of low-speed parking collisions or vehicle security vulnerabilities. (Added cost: $0)
• 1-6 months: Chrysler vehicles with active park assist risk sudden, unwanted braking when reversing. Ford actuators become completely inoperative, forcing manual key use. (Added cost: $0 - $500 (for minor bumper repair from parking incidents))
• 6+ months: A faulty door lock actuator or shorted wire creates a parasitic draw, draining the battery overnight and requiring replacement. (Added cost: $150 - $350 (for a new battery and diagnostic time))

Diagnosis Steps

1. Identify Your Vehicle & Read the Code
   Confirm your vehicle's manufacturer. Chrysler/Dodge/Ram/Jeep indicates a park assist issue; Ford/Lincoln/Mercury indicates power locks. Use a B-code compatible OBD-II scanner to confirm B1297 and note suffixes like '-11', '-25', or '-92'. Generic engine readers cannot see this code.
   Tools: OBD-II Scanner (B-code compatible) (Beginner)
2. Visual Inspection & Cleaning (Chrysler-Family)
   Thoroughly clean the inner driver-side rear parking sensor (labeled #10). Remove mud, ice, snow, or dirt from the face and the area behind the bumper. Clear the code with the scan tool and test if it returns.
   Tools: Soap, water, microfiber cloth (Beginner)
3. Perform Sensor Swap Test (Chrysler-Family)
   Swap the suspected bad sensor (inner driver-side, #10) with its neighbor (outer driver-side, #11). Clear the codes. If the code changes to B1298, the sensor is definitively faulty. If B1297 returns, the wiring for position #10 is damaged.
   Tools: Trim removal tool or small flathead screwdriver (Intermediate)
4. Test Power Lock Functionality (Ford-Family)
   Test the locks using the driver's switch, passenger's switch, and key fob. If only one door fails, the actuator or wiring for that door is bad. If all doors fail, inspect the fuse, relay, or Body Control Module (BCM).
   Tools: None (Beginner)
5. Listen for Sensor Activity (Chrysler-Family)
   Put the vehicle in reverse (engine off, ignition on). Place your ear close to each rear sensor. A healthy sensor emits a faint, rapid clicking. The B1297 sensor (inner driver-side) will be silent if it has failed internally.
   Tools: None (Beginner)
6. Inspect Wiring Harness (Both)
   For Chrysler, trace the wiring harness from the sensor under the rear bumper. Look for cuts or corrosion, especially at the 24-way connector (XY630A) behind the driver's rear wheel well liner. For Fords, pull back the rubber boot between the door and body to check for broken wires.
   Tools: Flashlight (Intermediate)
7. Check Fuses (Ford-Family)
   Locate the power door lock fuse in the owner's manual. Pull the fuse and inspect the metal strip. Replace it with the exact same amperage rating if broken.
   Tools: Fuse puller or needle-nose pliers (Beginner)
8. Pro Tip: Test Sensor Circuit with Multimeter (Chrysler-Family)
   Disconnect the sensor. With ignition on and in reverse, probe the connector. The supply wire should show ~8.4V. A voltage reading above 10.0V on the signal wire indicates a short to battery (B1297-12). For B1297-11 (Short to Ground), check continuity between the signal wire and ground; resistance below 5.0 Ohms indicates a short.
   Tools: Digital Multimeter (Advanced)
9. Advanced: Test Sensor Resistance (Chrysler-Family)
   Measure resistance between the 'plus' and 'minus' contacts on the disconnected sensor; it should be over 0.5 MΩ. Measure between the signal pin and the other two pins; expect 2 kΩ to 40 kΩ. Infinite resistance indicates a failed sensor.
   Tools: Digital Multimeter (Advanced)
10. Advanced: Analyze Scan Tool Live Data (Chrysler-Family)
    Access PAM live data. Monitor 'Park Assist Sensor Supply Voltage' (should be > 6.5V) and individual sensor status. A faulty sensor shows 'Invalid' or 'Fault', confirming the module sees the physical error.
    Tools: Advanced OBD-II Scan Tool (Advanced)

When This Code Triggers (Freeze-Frame Conditions)

• Ignition Status: ON / RUN (The code sets with the key on, either during a system self-test or in response to user input.)
• Gear Selector Position (Chrysler-Family): Reverse (The Park Assist Module (PAM) actively checks sensor circuits when the vehicle shifts into reverse.)
• User Input (Ford-Family): Lock/Unlock Command (The Body Control Module (BCM) triggers the code upon detecting a circuit fault after receiving a command from the door switch or key fob.)
• System Voltage: 11-14V (The fault is detected at normal operating voltage. Very low battery voltage causes erratic module behavior and triggers false codes.)

Related Codes

• B1295, B1296, B1298 (Chrysler-Family) — These represent the other rear park assist sensors. If multiple codes appear simultaneously, the shared main wiring harness or connector (XY630A) is damaged; four sensors do not fail at once.
• B1297-11 (Chrysler-Family) — Indicates 'Circuit Short to Ground'. This points to a pinched wire touching the vehicle frame or a completely disconnected sensor.
• B1297-12 (Chrysler-Family) — Indicates 'Circuit Short to Battery'. Caused by chafed wires touching a power source or an internal failure of an incompatible aftermarket sensor.
• B1297-25 (Chrysler-Family) — Indicates 'Signal Shape / Waveform Failure'. The most common variant, caused by mud or ice obstructing the sensor face.
• B1235 (Ford) — A general 'Window/Lock Switch Circuit Failure' code. Seeing this alongside B1297 confirms the issue is electrical (actuator motor or wiring) rather than a mechanical latch jam.

Climate & Environmental Factors

• Cold Weather / Freezing Temperatures: Ice blocking the Chrysler sensor face causes B1297-25. On Fords, water intrusion freezes inside the door lock actuator, seizing the motor (subject of recall 17S33).
• High Humidity / Heavy Rain: Moisture penetrates weathered seals, corroding pins in the Chrysler main harness connector (XY630A) or destroying the internal contacts of Ford door lock actuators.
• Mud and Dirt: Dried mud on the Chrysler sensor face blocks ultrasonic waves, triggering a B1297-25 waveform fault identical to an ice obstruction.

How to Talk to a Mechanic About This Code

Say this: "For Chrysler: "I have a B1297 code for the inner driver-side park assist sensor. Please clean it and perform a sensor swap test before replacing parts." For Ford: "I have a B1297 code and my door lock is failing. Please check if my VIN has an open recall like 17S33 for the door latches before diagnosing.""

Directs the technician to the most efficient path (cleaning, swapping, checking recalls) and prevents immediate, expensive part replacements without verification.

Avoid saying:

• 'Just fix whatever's wrong'
• 'My park assist isn't working, can you look at it?'
• 'My door lock is broken, I probably need a new one'

Questions to ask before authorizing the repair:

• For Chrysler: Did you perform the sensor swap test? Did the code change to B1298?
• For Chrysler: Did you inspect the main harness connector behind the wheel well for corrosion?
• For Chrysler: Is there a TSB for a software update for this code on my vehicle?
• For Ford: Did you confirm the failure is the actuator motor and not a broken wire in the door jamb?
• For Ford: Is this repair covered under a recall or customer satisfaction program?

Where to Take It: Dealer vs Independent vs Chain

• Dealer: Mandatory first stop for Ford owners to check for free recall work, and for Chrysler owners needing a software update. Otherwise, too expensive for this repair.
  Best for: Performing free recall work (Ford door latches)., Performing software updates (TSBs) for the Park Assist Module (Chrysler).
  Downsides: Highest labor rate makes simple sensor replacements unnecessarily expensive. (Typical cost: +50% vs. baseline)
• Independent Shop: Best fit for most B1297 repairs. A reputable independent shop diagnoses and fixes this common issue cost-effectively.
  Best for: Out-of-warranty vehicles., Replacing park assist sensors or door lock actuators., Diagnosing and repairing wiring issues.
  Downsides: May lack manufacturer-specific tools for module software updates. (Typical cost: +0% vs. baseline)
• Chain Shop: Acceptable for a straightforward park assist sensor replacement. Avoid for initial diagnosis, wiring problems, or Ford door lock issues.
  Best for: Simple part replacement where you have already diagnosed the issue yourself.
  Downsides: Technician skill varies widely., Unable to clear Body (B) codes if their scanners are basic. (Typical cost: -10% vs. baseline)

When to Walk Away From the Repair

If the estimated repair cost exceeds 40-50% of the car's private-party value, pause and consider alternatives.

• Car worth $5000, fix is $350: Fix it. The cost is minor relative to the car's value and restores a key feature.
• Car worth $15000, fix is $600: Fix it. The repair is well below the threshold.
• Car worth $2500, fix is $1200: Walk away. The repair cost is nearly 50% of the car's value. Consider selling 'as-is'.

What Scan Tool You Need for This Code

Minimum: A scanner capable of reading and clearing Body (B) codes from the Body Control Module (BCM) or Park Assist Module (PAM).

A $20 engine-only code reader cannot see or clear B1297. The system remains disabled after a physical repair until the code is cleared from the correct module.

Budget: BlueDriver Pro (~$100) — Connects to your smartphone via Bluetooth. Reads and clears enhanced codes like B1297 from the BCM/PAM and views live data. Excellent for DIYers.

Mid-range: Foxwell NT510 Elite (~$180) — Provides dealer-level diagnostics for one manufacturer. Reads specific B1297 suffixes (-11, -25) and accesses all vehicle modules.

Professional: Autel MaxiCOM MK808S (~$450) — Professional tablet scanner with full bidirectional control. Commands door lock actuators to cycle for testing and views extensive live data.

Rent vs buy: Auto parts stores offer free code reading, but their basic tools often cannot read 'B' codes. Buying a budget pick like the BlueDriver is a smart investment for this specific code.

How to Clear the Code After You Fix It

1. Perform the physical repair (replace sensor, actuator, or repair wiring).
2. Use a B-code capable OBD-II scan tool to clear the fault from the Park Assist Module (PAM) or Body Control Module (BCM).
3. Cycle the ignition off, then back on.
4. Test system functionality by shifting into reverse or operating the power locks.

Drive cycle: No drive cycle is required. The system resets and self-tests immediately upon clearing the code and cycling the ignition.

Watch out for:

• On Chrysler vehicles, fixing the physical part does not remove the 'Service Park Assist' message; you must clear the code electronically.
• Basic engine-only code readers cannot communicate with the PAM or BCM to clear this code.
• Disconnecting the battery fails to clear the code from the module's non-volatile memory.

Will This Fail Emissions / State Inspection?

No — by itself this code doesn't fail OBD inspection (but it can keep readiness monitors from setting, which causes a separate fail).

• California: This code will NOT fail a California smog check. The test focuses strictly on powertrain ('P') codes and emissions monitors.
• New York: B1297 does not cause a failure of the NYS OBD-II emissions inspection, as it does not command the Check Engine Light (MIL).
• Texas: This code passes the OBD-II portion of the Texas state inspection, which only targets emissions-related faults.

Most Commonly Affected Vehicles

• Ram 1500 / 2500 / 3500 (2013-2020) — Extremely common due to sensor obstruction and harness routing. The main connector behind the driver's side rear wheel frequently fails from corrosion.
• Dodge Grand Caravan (2009-2020) — Shares the Park-Thru System (PTS) with Ram trucks. Highly prone to B1297-25 waveform failures from dirt and moisture.
• Jeep Grand Cherokee (2011-2018) — Uses the Chrysler PTS system. TSBs exist for false sensor readings requiring a dealer software update.
• Ford F-150 (2011-2018) — Notorious for power door lock failures. Multiple recalls (17S33, 20S15) address water intrusion and freezing latches.
• Chrysler Pacifica (2017-2023) — TSB 08-001-17 addresses software updates to correct erratic park assist behavior. Weak batteries also trigger false codes on this model.
• Ford Fusion, Focus, Escape (2012-2016) — Included in massive door latch recalls (15S16, 20S15) for breaking pawl spring tabs. The underlying actuator system is identical.

Manufacturer-Specific Notes

• Ram / Dodge / Chrysler / Jeep: The system must be reset with a capable scan tool after repair. Fixing the physical part will not clear the 'Service Park Assist' message from the PAM. Disconnecting the battery does not work.
• Ford / Lincoln: Check for recall campaign 17S33 (NHTSA 17V652) before paying for repairs. Dealers install water shields and replace freezing door latches for free.
• Chrysler / Dodge / Jeep / Ram: Rear sensors are numbered 8, 9, 10, and 11 from passenger-outer to driver-outer. B1297 always points to sensor #10, the inner driver-side sensor.
• Chrysler / Jeep: TSBs 08-082-20 and 08-047-19 address overly sensitive PAM software setting false B1297-25 codes. The fix is a dealer software reflash.

Real Owner Stories

2015 Ram 2500 with intermittent 'Service Park Assist' message

The owner experienced false park assist warnings showing an object immediately behind the truck during rain, followed by system shutdown.

What they tried:

1. Visually inspected and re-connected all sensor connectors.
2. Discovered a broken female connector and a pinched wiring harness between the bumper and frame.
3. Replaced the harness and fixed bent pins, but the system remained dead.

Outcome: The owner read code B1297-11 (Short to Ground). After clearing the code with a scan tool, the system worked perfectly. The physical repair was successful, but the module required an electronic reset.

Lesson: On Chrysler vehicles, the system will not reactivate on its own after a repair. You must clear the code with a capable scanner.

2014 Ram 1500 with multiple codes after DIY sensor replacement

After replacing the rear harness and all four sensors with aftermarket parts, the system worked in reverse but threw codes B1295-12 through B1298-12 ('short to battery') when driving forward over 10 mph.

What they tried:

1. The owner had already replaced the harness and sensors.

Outcome: This is a known compatibility issue with cheap aftermarket sensors. They function in reverse but send incorrect signals when the module attempts to turn them off in drive, triggering false short circuit codes.

Lesson: Avoid ultra-cheap non-OEM park assist sensors. Incompatible aftermarket parts cause confusing new fault codes even if they appear to work initially.

Ford F-150 with an inoperative rear door lock

One rear door would not unlock automatically when shutting off the truck. The owner had to use the key fob to lock and unlock all doors to open it.

What they tried:

1. Verified the child-lock was not engaged.

Outcome: The owner discovered Ford Field Service Action (FSA 20M04) covering power door lock actuator failure. The dealer replaced the corroded actuator free of charge under the extended warranty program.

Lesson: Always check for active Ford recalls or customer satisfaction programs (like FSA 18N03 or 20M04) before paying out of pocket for door lock repairs.

2021 Ram with multiple sensor codes (B1297-11 & B1298-11)

The 'Service Park Assist' message illuminated, with codes indicating faults in both driver-side sensors (#10 and #11).

What they tried:

1. Performed a sensor swap test, but the codes remained for the same positions, proving the sensors were good.
2. Inspected the wiring harness and found a pinch point near the bumper frame with three broken wires.

Outcome: The technician soldered the broken wires and sealed the repair with heat shrink. After clearing the codes, the system functioned normally.

Lesson: If multiple sensor codes appear on the same side, the problem is shared wiring, not multiple failed sensors. Inspect the harness before buying parts.

How to Prevent This Code From Triggering

• Regularly clean park assist sensors (Chrysler-Family) (During car washes or after driving in mud/snow) — Removes dirt and ice that block ultrasonic signals and trigger B1297-25 faults.
• Apply dielectric grease to electrical connectors (When replacing a sensor or exposing connectors) — Creates a waterproof seal preventing moisture intrusion in vulnerable connectors like the main XY630A harness.
• Inspect and secure wiring harnesses (Annually or during underbody service) — Detects chafing or pinching on the rear bumper harness before wires break and cause short circuits.
• Check for Ford door latch recalls (Ford-Family) (Before any door lock repair) — Dealers install protective water shields and replace failing actuators for free under programs like 17S33.

Frequently Asked Questions

Can I fix code B1297 myself?

Yes. For Chrysler vehicles, cleaning or replacing the park sensor is a simple DIY job requiring minimal tools. For Ford vehicles, replacing a fuse is easy, but replacing a door lock actuator requires removing the interior door panel and is more challenging.

How much does it cost to fix B1297?

Cleaning a Chrysler park sensor costs $0. Replacing it costs $20-$80 for parts and $50-$125 for labor. Replacing a Ford door lock actuator costs $50-$150 for parts and $150-$300 for labor.

What does the little number after B1297 mean (e.g., B1297-25)?

The two-digit suffix specifies the failure type. For example, '-11' means Short to Ground, '-12' means Short to Battery, and '-25' means Waveform Failure (usually an obstruction). This helps technicians pinpoint the exact electrical fault.

Why did my park assist stay off after I replaced the sensor?

On Chrysler vehicles, the fault code must be cleared from the Park Assist Module using a capable scan tool. The system remains disabled until the stored code is electronically erased.

All my park assist sensors failed at once. Is the module bad?

It is highly unlikely. Multiple simultaneous sensor codes almost always indicate a damaged shared wiring harness, a corroded main connector, or a blown fuse.

My sensor is perfectly clean, why is B1297-25 still active?

If the sensor passes a swap test, the issue is likely software-related. Chrysler issued TSBs for overly sensitive modules setting false codes, which requires a dealer software update.

Can I just tape over the bad parking sensor?

No. Taping over the sensor completely disables its ability to detect obstacles and compromises the safety function of the system.

Where is the Park Assist Module (PAM) located?

Location varies by model. On Ram trucks and Dodge Caravans, it is often hidden in the headliner. On others, it mounts under the dashboard on the driver's side.

Key Takeaways

• Code B1297 indicates a faulty inner driver-side rear parking sensor on Chrysler vehicles, or a power door lock circuit failure on Ford vehicles.
• Clean the inner driver-side rear parking sensor first on Chrysler vehicles, as mud or ice blocking the sensor face causes 80% of B1297-25 faults.
• Check for Ford safety recalls like 17S33 before paying for a door lock actuator replacement, as dealers often fix water intrusion issues for free.
• Perform a sensor swap test on Chrysler vehicles by trading the inner and outer driver-side sensors; if the code changes to B1298, the sensor is definitively dead.
• Clear the B1297 code from the Park Assist Module using an advanced OBD-II scanner after any physical repair, or the system will remain permanently disabled.