P2610 on 2013 Dodge Grand Caravan: PCM Timer Performance Causes and Fixes

What's Unique About the 2013-2013 Dodge GRAND CARAVAN

The 2013 Dodge Grand Caravan, along with its platform mates like the Chrysler Town & Country and Dodge Journey, is highly susceptible to this code due to a well-documented software issue. Chrysler (now Stellantis) issued Technical Service Bulletin (TSB) #18-050-16 specifically for the 2013 Grand Caravan, stating that P2610 and other related codes can be resolved by reprogramming the PCM with updated software. This means the problem is rarely a hardware failure and is most often a software bug that requires a dealer-level reflash to fix.

Diagnostic Flowchart

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

Symptoms You May Notice

• Check Engine Light is on.
• Vehicle will fail an emissions test.
• Potential for harsh shifting after a 10-30 minute shutdown (addressed by the same TSB).
• In some cases, intermittent no-start, extended crank, or stalling conditions.
• Standard code scanners may be unable to clear the code until the underlying software issue is fixed.

Most Likely Causes

1. Outdated Powertrain Control Module (PCM) Software 🔴 High Probability → Shop Engine Control Module (ECM) Manufacturer TSB #18-050-16 was issued specifically to address P2610 on the 2013 Grand Caravan with a software update. This is a known glitch affecting this platform.
   How to confirm: A Dodge dealer or a well-equipped independent shop must check the current PCM software calibration ID against the latest available version using a wiTECH scan tool. The presence of the code, especially alongside P0335, is a strong indicator.
   Typical fix: Reprogram (reflash) the PCM with the latest software version. This service typically takes about an hour.
   Est. part cost: $150-$250 (Service Cost)
2. Weak or Failing Battery 🟡 Medium Probability → Shop Vehicle Battery The PCM's internal timer relies on a stable voltage supply from the battery to maintain its memory when the engine is off. Low voltage from an aging or weak battery, especially during cold weather, can corrupt this memory and trigger the code.
   How to confirm: Test the battery with a multimeter or digital battery tester. A healthy resting battery should show approximately 12.4-12.6 volts. A load test is the most definitive way to confirm battery health. Many auto parts stores will perform this test for free.
   Typical fix: Replace the vehicle's 12V battery. An AGM (Absorbent Glass Mat) battery may be required.
   Est. part cost: $150-$300

Rare But Worth Checking

• Faulty Powertrain Control Module (PCM): → Shop Engine Control Module (ECM) This is a last resort. If a software update has been performed and the battery and its connections are confirmed good, the PCM itself may have an internal hardware fault, such as from corrosion or a cracked solder joint. This is rare compared to the software issue.
• PCM Power or Ground Circuit Issue: Corrosion or damage to the PCM wiring harness, connectors, or main ground connections can cause intermittent power loss, triggering P2610. A user on a forum reported that wiggling a specific PCM connector allowed the vehicle to start, pointing to a connection issue.

Diagnosis Steps

1. Scan for other codes. Note if P0335, U0140, or P0456 are present, as this strongly points to the TSB-related software issue.
2. Verify battery health. Test the battery to ensure it has a static charge of at least 12.4V and passes a load test. Check terminals for corrosion and tightness. A weak battery is a common and relatively inexpensive fix to rule out first.
3. Check for TSBs. Confirm with a dealer that TSB #18-050-16 is applicable and has not already been performed on your vehicle's VIN. This is the most likely solution path.
4. Perform PCM Reflash. If an update is available, have a dealer or qualified shop perform the PCM software reflash. This is the highest probability fix. Ensure the shop uses a battery charger during the flash process to maintain stable voltage between 13.2 and 13.5 volts.
🎬 See how a professional PCM reflash is performed
5. Inspect PCM wiring and fuses. If the code persists after a reflash and with a good battery, check fuses related to the PCM (often labeled ECM/PCM) and inspect the PCM's connectors for corrosion, moisture, or damage.
6. Consider PCM Replacement. Only if all other steps fail should the PCM itself be considered faulty. A replacement will require programming to your vehicle's VIN and can cost over $800.
🎬 Watch: How to locate and replace the PCM

Parts You'll Likely Need

• PCM Software Update (Service) — This is not a physical part, but a service to install updated software from the manufacturer. It is the most common fix documented in TSB #18-050-16 for this specific vehicle and code.
  OEM price range: $150-$250
  Aftermarket price range: N/A
• Automotive Battery — A weak or failing battery can cause erratic voltage, leading to this and other electronic fault codes. It's the second most common cause after the software issue.
  Trusted brands: Mopar, Interstate, DieHard
  OEM price range: $200-$300
  Aftermarket price range: $150-$250

Related Codes That Often Appear With This One

• P0335 — Crankshaft Position Sensor Circuit. TSB #18-050-16 explicitly lists this code alongside P2610 as being resolved by the PCM reflash. An erratic crank sensor signal can confuse the PCM's logic for determining if the engine is on or off.
• U0140 — Lost Communication With Body Control Module (BCM). Also listed in TSB #18-050-16, indicating the software update addresses communication glitches between modules.
• P0456 — EVAP System Small Leak. Also mentioned in TSB #18-050-16. The engine-off timer is critical for the EVAP monitor to run its tests, so a timer fault can incorrectly trigger EVAP codes.

Technical Service Bulletins (TSBs) & Recalls

• 18-050-16: Flash: Powertrain Diagnostic and System Improvements. Involves reprogramming the PCM to fix P2610, P0335, U0140, and P0456. Also addresses a harsh shift complaint after a 10-30 minute shutdown.

Platform-Specific Known Issues

• TSB #18-050-16 specifically addresses the P2610 code on 2013 Dodge Grand Caravans with the 3.6L engine. The bulletin states that a PCM software reflash will resolve the issue, often along with codes P0335, U0140, and P0456.
• A real-world owner experience for the platform-mate 2013 Chrysler Town & Country confirmed the fix. The owner first replaced the battery, but the code persisted. A trip to the dealer for the PCM software update permanently resolved the P2610 code.

Mechanic-Grade Diagnostic Values

• Battery Voltage at PCM Connector (Engine Off) — expected: > 12.2 V. Failure: Voltage below 12.2V suggests a weak battery or excessive voltage drop in the power supply circuit.
• Charging System Voltage at PCM Connector (Engine Running) — expected: 13.5 V to 14.5 V. Failure: Voltage outside this range points to a problem with the alternator or voltage regulator.
• Scan Tool Live Data PID: 'Engine Off Timer' — expected: Counts down to zero within 5-10 seconds after engine shutdown.. Failure: The timer does not count down, counts erratically, or does not reset, confirming the fault.
🎬 Watch: Understanding the engine off timer and common fixes
• PCM Ground Circuit Resistance — expected: Below 5.0 Ohms. Failure: Resistance above 5.0 Ohms indicates a poor ground connection, which can cause various electrical issues.

Scan Tool Commands That Help

• wiTECH: Reprogram PCM (Flash) — This is the primary repair procedure specified by TSB #18-050-16 to fix the P2610 software glitch after verifying battery health.
• wiTECH: Clear All DTCs — This function should be used after the PCM reflash is complete to clear P2610 and any other related codes set during the process.
• Professional Scan Tool: CAN Bus Test / Network Scan — To verify the integrity of the communication network. If communication errors are present, it may point to a wiring issue rather than an internal PCM fault.

Wiring & Ground Locations

• Powertrain Control Module (PCM) — On the 2013 Grand Caravan, the PCM is located in the driver's side front wheel well area, hidden behind the fender liner.. This location makes the PCM and its connectors susceptible to moisture and physical damage, which can lead to corrosion and connection issues that may trigger P2610.
• Underhood Fuse Box (Totally Integrated Power Module - TIPM) — Located in the engine bay, next to the battery.. This box contains the fuses and relays that supply power to the PCM. A faulty fuse or PCM relay in this location can cut power to the module and cause timer performance issues.
• PCM Relay — Inside the underhood fuse box (TIPM), typically in a corner position. The fuse box lid has a diagram identifying it.. This relay controls the main power supply to the PCM. If it fails, the PCM will not power up or shut down correctly, directly causing timer-related fault codes like P2610.
• PCM Fuses — Multiple fuses for the PCM are located in the underhood fuse box (TIPM). Check the diagram on the fuse box lid for fuses labeled 'PCM', 'ECM', or 'ECU'.. A blown fuse will interrupt the constant or ignition-switched power the PCM needs to maintain its internal clock memory, leading to code P2610.

OEM Part Supersession History

• 5150253AC → 68243295AB — Part revision by manufacturer.
  Heads up: This is a PCM part number. Always verify compatibility with the vehicle's VIN before ordering a replacement.
• Hardware Code 05150724AC → Various service part numbers like 68161513AG or 68161514AE — The hardware code represents a family of compatible PCMs, while the service part number is the specific, programmed unit.
  Heads up: When replacing a PCM, the service part number must match or be a valid supersession for the original. The hardware code alone is not sufficient.