P2507 on 2007-2018 Jeep Wrangler: ECM/PCM Power Input Low Causes and Fixes

What's Unique About the 2007-2018 Jeep Wrangler

The 2007-2018 Jeep Wrangler JK is notorious for issues with its Totally Integrated Power Module (TIPM), which is the central hub for all vehicle electronics. While P2507 can be caused by a simple battery issue on any car, on this specific Jeep, it is frequently a symptom of an internal failure within the TIPM. The non-serviceable relays and circuits inside the TIPM that supply power to the PCM can degrade and fail, leading to the low voltage condition that triggers this code and can cause sudden, dangerous stalling. This issue is so common that a robust aftermarket for TIPM repair and remanufacturing exists specifically to address these relay failures.

Generation note: The 2007-2018 range primarily covers the Jeep Wrangler JK generation. The new JL generation was also introduced in 2018. While the fundamental meaning of P2507 is the same, the JK platform (specifically 2007-2013 models) is widely known for TIPM failures that can cause this code. If you have a 2018, confirm if it is a JK or the newer JL model, as diagnostics and the TIPM design may differ.

Symptoms You May Notice

• Check Engine Light is on
• Engine stalls unexpectedly while driving or at idle
• Vehicle cranks but fails to start
• Intermittent no-start condition
• Noticeable loss of engine power
• Other random electrical issues, such as wipers, horn, or power locks acting erratically (points towards TIPM failure)
• Electronic Throttle Control (ETC) warning light may illuminate along with the Check Engine Light
• Security system light (red dot on the dash) may stay on, indicating a WCM/SKREEM module issue which can be related

Most Likely Causes

1. Weak or Failing Battery 🔴 High Probability → Shop Vehicle Battery Batteries have a finite life and are exposed to vibration and temperature extremes, common in a Wrangler's operating environment. Winches and aftermarket lights can also place extra strain on the battery.
   How to confirm: Test the battery with a multimeter. A healthy battery should show ~12.4V or more with the engine off, and maintain above 10V during cranking. With the engine running, voltage should be between 13.5V and 14.5V. Many auto parts stores will perform a free load test, which is more definitive.
   Typical fix: Replace the battery if it fails a load test or cannot hold a charge.
   Est. part cost: $150-$300
2. Corroded or Loose Battery Terminals / Ground Wires 🔴 High Probability → Shop Vehicle Battery
   How to confirm: Visually inspect the battery terminals for white or blue-green corrosion. Follow the main negative cable from the battery to the chassis and engine block; ensure the connections are clean, tight, and free of rust. A common hidden failure point is corrosion inside the cable crimp at the terminal end. A multimeter check from the ground post to the chassis should show less than 0.1 Ω of resistance.
   Typical fix: Disconnect the battery, clean the terminals and cable ends with a wire brush and baking soda solution, and re-tighten securely. Clean and secure ground straps. If corrosion is severe, the entire battery cable assembly may need replacement.
   Est. part cost: $5-$100
3. Failing Totally Integrated Power Module (TIPM) 🟡 Medium Probability → Shop Fuse Box The TIPM used in this generation of Jeep is well-documented for internal relay and circuit board failures, particularly the fuel pump and PCM power circuits. These relays are soldered to the board and not designed to be user-replaceable.
   How to confirm: After ruling out the battery and connections, this is the next logical suspect, especially if other random electrical issues are present (horn, wipers, door locks). Diagnosis can involve testing for voltage drop across the TIPM's PCM power output pin, but this often requires a wiring diagram. A common owner experience is having a no-start or stalling issue that is temporarily resolved by tapping on the TIPM.
   Typical fix: Replace the TIPM with a new or remanufactured unit. Several companies (e.g., Circuit Board Medics, MAKS TIPM Rebuilders) offer repair/rebuild services where they replace all common failure-prone relays with upgraded components.
   Est. part cost: $400-$1200
4. Faulty Alternator ⚪ Low Probability → Shop Alternator
   How to confirm: With the engine running, check the voltage at the battery terminals. If the voltage is below 13.2V or not increasing from the resting voltage, the alternator is likely not charging the battery properly. A failing diode within the alternator can also introduce AC ripple voltage, confusing sensitive electronics, which can be tested with a specialized multimeter.
   Typical fix: Replace the alternator.
   Est. part cost: $200-$500

Rare But Worth Checking

• Damaged Wiring Harness: The wiring harness that supplies power to the PCM can become damaged due to heat, chafing against the engine block or firewall, or impact. A visual inspection of the harness between the TIPM and the PCM is worthwhile if other causes are ruled out.
• Faulty Powertrain Control Module (PCM): → Shop Engine Control Module (ECM) While the code points to a problem with the PCM's power input, the PCM itself can fail internally. This should be considered the last resort after all other possibilities, especially the TIPM, have been thoroughly ruled out.
• Faulty Wireless Control Module (WCM/SKREEM): On early JKs (especially 2007-2008), a faulty WCM can cause a no-start condition that may be confused with a P2507 fault. TSB 08-007-08 describes an issue where static discharge can lock up the WCM, preventing the engine from cranking. A temporary fix is to pull the IOD fuse (M13 in some models) for 30 seconds to reset the module.

Diagnosis Steps

1. Read Freeze Frame Data: Note the conditions (engine temp, speed, etc.) under which the code was set.
2. Inspect Battery and Terminals: Check the battery's state of charge with a multimeter. Voltage should be ~12.4V+ (engine off) and 13.5-14.5V (engine running). Get the battery load tested at an auto parts store. Clean any corrosion from terminals and ensure clamps are tight.
3. Check Main Grounds: Inspect the main battery-to-chassis and engine-to-chassis ground straps. Ensure they are clean, tight, and not corroded internally. Resistance from the battery negative post to the chassis and to the engine block should be less than 0.1 Ohms.
4. Inspect Fuses and Relays in TIPM: Check all fuses related to the PCM and ignition system. While the main power relay for the PCM is internal, you can try swapping other accessible relays (like horn/wiper) to rule out issues with those circuits if they are also acting up.
5. Check for TSB 08-007-08 Symptoms: If you have a no-crank, no-start condition on a 2007-2008 model, try the IOD fuse reset. 🎬 Watch: How to fix a no-start using the IOD fuse reset Pull the M13 fuse (confirm location on your fuse box cover) for 30-60 seconds and then reinstall it. If the vehicle starts, the WCM is the likely culprit.
6. Test TIPM Output: If equipped with the knowledge and tools, test for voltage at the PCM power supply pin coming out of the TIPM. A significant voltage drop between the battery and this pin indicates a faulty TIPM.
7. The 'Tap Test': Gently tap on the top of the TIPM with the handle of a screwdriver while an assistant tries to start the vehicle. If the vehicle starts or stalls during the tapping, it strongly suggests a bad internal connection or relay in the TIPM.
8. Condemn PCM Last: Only consider replacing the PCM after exhausting all other possibilities, especially confirming the TIPM is functioning correctly.

Parts You'll Likely Need

• Battery — A weak or failing battery is the most common source of low voltage issues in any vehicle.
  Trusted brands: Interstate, DieHard, Optima
  OEM price range: $200-$350
  Aftermarket price range: $150-$300
• Totally Integrated Power Module (TIPM) (OEM #Varies by year. Ex: 68105503AB (2012-2013), 68244873AA (2012), 4692335AI (fits multiple years). Always verify with VIN.) — This is a well-known failure point on the 2007-2018 Wrangler that directly causes low voltage to the PCM and triggers code P2507.
  Trusted brands: Mopar (OEM), Dorman (Remanufactured), MAKS TIPM Rebuilders (Rebuilt), Circuit Board Medics (Repair Service)
  OEM price range: $800-$1200
  Aftermarket price range: $400-$700
• Battery Terminals / Cables — Corrosion on terminals or cables creates high resistance, preventing proper voltage from reaching the vehicle's electrical systems.
  Trusted brands: Standard Motor Products, Dorman, Mopar
  OEM price range: $50-$150
  Aftermarket price range: $20-$80

Related Codes That Often Appear With This One

• U0100 (Lost Communication With ECM/PCM)
• P0562 (System Voltage Low)

Technical Service Bulletins (TSBs) & Recalls

• TSB 08-007-08: Addresses a 'No Engine Crank or No Engine Start' condition due to an electronic lockup of the Wireless Control Module (WCM/SKREEM), primarily affecting 2007-2008 models.

Platform-Specific Known Issues

• A recall (G09) was issued for some 2007 Jeep Wranglers for a TIPM timing error that could cause engine stalling. While not explicitly for P2507, it highlights the early issues with this component.
• Widespread owner complaints and a class-action lawsuit have been filed concerning TIPM failures on Jeep and other Chrysler vehicles from this era, causing a range of electrical problems including stalling and no-start conditions.

Mechanic-Grade Diagnostic Values

• PCM Power Input Voltage (Key On, Engine Off) — expected: Should be equal to battery voltage (~12.4V or higher).. Failure: Voltage drops below 9V, or is significantly lower than battery voltage, indicating high resistance in the circuit.
• Main Ground Circuit Resistance — expected: Less than 0.1 Ohms.. Failure: Resistance higher than 0.1 Ohms indicates a poor ground connection that can cause voltage drops under load.
• PCM 5-Volt Reference Output — expected: Stable 5.0 Volts at various sensor connectors.. Failure: Voltage below 4.5V or unstable readings can indicate an internal PCM fault, though this is rare.

Scan Tool Commands That Help

• wiTECH (Dealer Scan Tool): Flash Reprogram TIPM — Used to update the TIPM software to correct logic errors that may cause intermittent electrical issues, including no-start or stalling conditions. This is often done to comply with a Technical Service Bulletin (TSB).
• wiTECH (Dealer Scan Tool): View 'Last VTA Trigger' — When diagnosing intermittent electrical faults alongside P2507, this function within the TIPM module can show what event triggered the vehicle theft alarm, potentially pointing to a related wiring or module fault.
• Manual Procedure: TIPM Soft Reset — To resolve minor, temporary software glitches in the TIPM without a scan tool. Disconnect the battery, turn the ignition key to the 'RUN' position for at least 120 seconds, turn off, and then reconnect the battery.

Wiring & Ground Locations

• PCM Power Input Pins — On the main harness connectors at the Powertrain Control Module (PCM), typically mounted on the firewall in the engine bay.. These are the specific terminals where the PCM receives its operating voltage. Testing voltage directly at these pins is the definitive way to confirm if the PCM itself is receiving low voltage. For 3.6L engines (2012+), a key pin is C1 Pin 23 (Ignition Run/Start). For 3.8L engines (2007-2011), key pins are Pin 2 (Ignition Power) and Pin 22 (Fused B+ Power) on the black connector.
• PCM Ground Pin — On the main harness connectors at the PCM.. A poor ground connection at the PCM can cause a floating voltage and trigger a low input voltage code. For 3.8L engines, Pin 32 of the black connector is a primary ground. Verifying continuity to chassis ground from this pin is critical.
• Main Engine/Body Grounds — Key ground points include a strap from the battery negative terminal to the vehicle body (inner fender), and a strap from the engine block to the chassis/firewall.. All current flows back to the battery through these grounds. Corrosion or a loose connection at these points creates high resistance for the entire electrical system, causing system-wide low voltage.
• TIPM Connectors — Underneath the TIPM (fuse box) in the engine bay. They are large, color-coded connectors with rotating locking levers.. The power feed wire for the PCM originates here. A corroded pin or loose connection at the specific TIPM output pin that powers the PCM can cause P2507. A voltage drop test between the TIPM output and the PCM input is a key diagnostic step.

Real Owner Repair Stories

• JK-Forum.com user (Jeep Wrangler JK (year not specified, but within 2007-2013 range)) — Front windshield washer not working, passenger front power window worked intermittently, door locks would not unlock with remote.
  ❌ Tried (didn't work) Initial diagnosis from a dealer pointed to a bad TIPM with a high repair quote ($700+).
  ✅ What actually fixed it The owner purchased a new TIPM for $250 and replaced it themselves in approximately 15 minutes, which resolved all the electrical symptoms.

OEM Part Supersession History

• Multiple PNs exist (e.g., 4692335AI) → Multiple revisions exist (e.g., 68105503AB, 68244873AA) — Revisions were made to address reliability issues, though problems persist even in later versions.
  Heads up: The TIPM is specific to the vehicle's model year and options (e.g., engine, transmission, trim level). The correct part number MUST be verified using the vehicle's VIN. Installing an incorrect TIPM can lead to numerous system malfunctions.

Model Year Variations Within This Range

• 2007-2011 vs. 2012-2018: The engine was changed from the 3.8L V6 to the 3.6L Pentastar V6 in 2012. This resulted in a different PCM, engine wiring harness, and potentially different PCM connector pinouts for power and ground. Diagnostics must account for the correct engine.
• 2011-2013: These model years are cited as having the highest failure rates for the TIPM, making it an even more likely culprit for code P2507 on these specific vehicles compared to earlier or later years.
• 2007: A specific recall (G09) was issued for 2007 Wranglers concerning a TIPM timing error that could lead to engine stalling, highlighting early production issues with this module.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• Death Wobble 🔴 High — Common on both stock and lifted JKs, often triggered by hitting a bump at speeds over 45 mph. Caused by worn or loose front suspension/steering components. (Ref: No specific recall, but it's a widely acknowledged issue. The root cause is typically a worn track bar, ball joints, or tie rod ends.)
• Cracked Exhaust Manifolds (3.8L EGH V6, 2007-2011) 🟠 Medium — Very common on the 3.8L engine. The original cast iron manifolds are prone to cracking from heat cycles, causing an exhaust leak and a ticking noise.
• Leaking Oil Filter/Cooler Housing (3.6L Pentastar V6, 2012-2018) 🔴 High — Extremely common. The plastic housing, located in the engine valley, cracks or its seals fail due to heat exposure, causing significant oil and/or coolant leaks. (Ref: Multiple TSBs have been issued, such as one for the 2022+ JL, advising on proper diagnosis before replacement, but no major recall on the JK.)
• Excessive Oil Consumption (3.8L EGH V6, 2007-2011) 🟠 Medium — A well-known issue, often attributed to failing piston rings or a faulty PCV system, leading to burning oil between changes.
• Rocker Arm / Cam Follower Failure (3.6L Pentastar V6, 2012-2018) 🟠 Medium — A known issue that causes a distinct 'Pentastar tick'. A bearing in the rocker arm fails, leading to wear on the camshaft lobes. Usually occurs on higher mileage engines.
• Faulty EGR Valve (3.8L EGH V6, 2007-2011) 🟡 Low — The EGR valve is prone to failure, causing rough idle, stalling, and codes like P0404 or P0406. It is in a very difficult-to-access location, making replacement labor-intensive.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For the TIPM, a used part from a junkyard is NOT recommended. The failure rate is extremely high across all years, and a used unit is likely to have the same internal defects or be near the end of its service life. It is a significant gamble that often leads to repeating the repair.

Donor-vehicle mileage cap: roughly under 50000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• Ensure no signs of physical damage, melting, or water intrusion.
• Verify the part number on the sticker matches your original unit exactly.
• If possible, source from a vehicle with a known history and lower mileage, preferably from a region without extreme heat.

OEM-only on this vehicle (don't cheap out):

• While a new Mopar TIPM is an option, its high cost and the component's known design flaws make it a less attractive choice than a quality remanufactured unit with upgraded internal parts.

Aftermarket brands forum-validated for this vehicle:

• Circuit Board Medics: Offers repair services and remanufactured units where they replace common failure-prone internal relays with more durable components.
• MAKS TIPM Rebuilders: A well-regarded company that specializes in rebuilding and selling TIPMs with positive reviews in owner forums.
• Dorman: Offers remanufactured TIPMs that are widely available, though owner experiences can be mixed. Ensure it comes with a good warranty.

Brands owners have reported issues with on this vehicle:

• Unbranded, low-cost units from online marketplaces like eBay or Amazon should be avoided. They often lack a warranty, quality control, and may be untested used parts sold as 'rebuilt'.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• P0562 — System Voltage Low. This code is often set alongside P2507 as they both point to the same root cause: a weak battery, failing alternator, or poor connections preventing proper voltage from reaching the vehicle's electronics.
• U0100 — Lost Communication With ECM/PCM. P2507 indicates the PCM is receiving low voltage; if the voltage drops out completely, even for a moment, other modules will log this U-code because they can no longer communicate with the PCM.
• P0627 — Fuel Pump 'A' Control Circuit/Open. This code is frequently associated with a failing TIPM, a primary cause of P2507 on this Wrangler. The internal fuel pump relay is a common failure point within the TIPM.
• P2101 — Throttle Actuator Control Motor Circuit Range/Performance. This code can be triggered when the Electronic Throttle Control (ETC) warning light illuminates, a listed symptom of P2507. Intermittent power loss to the PCM can cause the throttle body to report performance errors.
• P0513 — Invalid Immobilizer Key. This code is directly related to the WCM/SKREEM module issue described in TSB 08-007-08. When the WCM locks up, it fails to recognize the key, triggering this code and a no-start condition.

Frequently Asked Questions