P2610 on 2014 Ram ProMaster: PCM Timer Performance Causes and Fixes

What's Unique About the 2014-2014 Ram PROMASTER

On the 2014 Ram ProMaster with the 3.6L Pentastar engine, this code is very specifically addressed by a manufacturer TSB that links it to other seemingly unrelated codes like P0335 (Crankshaft Position Sensor) and P0456 (EVAP System Small Leak). This strongly indicates the root cause is a software logic problem within the PCM, rather than a simple hardware failure. The fix is not a part replacement, but a software update performed by a dealer. This issue is common across many Chrysler/Dodge/Jeep vehicles using the same engine family.

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
• Engine may stall unexpectedly
• Engine may be hard to start or fail to start
• Failure to pass an emissions inspection
• Other trouble codes, such as P0335, P0456, or U0140, may be present simultaneously
• Key may get stuck in the ignition 🎬 Watch: How a bad ground wire causes no-starts and stuck keys. (if other electrical faults like U0426 are also present)

Most Likely Causes

1. Outdated Powertrain Control Module (PCM) Software 🔴 High Probability → Shop Engine Control Module (ECM) Ram issued a specific Technical Service Bulletin (TSB #18-088-16 REV. A) to address this exact code, along with others, indicating a known software logic issue from the factory. This is a widely acknowledged problem across the 3.6L Pentastar engine family.
   How to confirm: A Ram dealer or a shop with a wiTECH scan tool can check the current software calibration on your PCM and see if it's eligible for the update mentioned in the TSB. The presence of P2610 along with P0335 is a very strong indicator.
   Typical fix: Reprogram (reflash) the PCM with the latest software version. The TSB also notes that the Transmission Control Module (TCM) may need an update at the same time.
   Est. part cost: $0
2. Weak or Failing Battery ⚪ Low Probability → Shop Vehicle Battery Modern vehicle electronics are sensitive to voltage. Low system voltage during shutdown can corrupt the PCM's memory where the timer data is stored, triggering P2610 on the next startup. The official TSB reflash procedure explicitly requires connecting a battery charger to maintain stable voltage, underscoring the PCM's sensitivity.
   How to confirm: Test the battery voltage with a multimeter (should be above 12.4V with the engine off). A more definitive test is a load test, which can reveal a weak battery even if the voltage seems okay. Many auto parts stores can perform a load test for free.
   Typical fix: Replace the vehicle's 12V battery. The ProMaster typically uses a Group Size H6 (or Group 48) battery.
   Est. part cost: $150-$250

Rare But Worth Checking

• Failing Powertrain Control Module (PCM): → Shop Engine Control Module (ECM) This should only be considered if the code returns after a successful software update and the battery/charging system has been confirmed to be in good health. An internal hardware failure in the PCM can prevent the timer from functioning correctly. In some cases, a bad driver circuit inside the PCM can be the root cause.
• Wiring Harness or Fuse Box Issue: Though rare, owners have reported electrical issues stemming from melted or corroded wiring in the under-hood fuse block. A visual inspection of the fuse box (especially the underside) and related PCM wiring harnesses for damage, corrosion, or water intrusion is a valid, albeit advanced, diagnostic step if software and battery issues are ruled out.

Diagnosis Steps

1. Scan the vehicle for all stored trouble codes. Note if P0335, P0456, or U0140 are present with P2610, as this strongly suggests the TSB applies.
2. Check for applicable TSBs. Specifically, reference TSB #18-088-16 REV. A for the 2014 ProMaster with the 3.6L engine.
3. Thoroughly test the battery and charging system. Ensure battery voltage is stable and above 12.4V with the engine off, and that the alternator is charging correctly (typically 13.5V-14.5V) when running. Perform a load test on the battery to confirm its health under stress.
4. If the TSB applies, the primary repair is to have a dealer or qualified shop reprogram the PCM with the latest software. Inform the service advisor about the specific TSB number.
5. After the reflash, ensure the technician clears all DTCs from all modules and performs a drive cycle to verify the code does not return.
6. If the code persists after the software update and with a known-good battery, further diagnosis of the PCM's power/ground circuits, the under-hood fuse box, or the PCM itself may be necessary.

Parts You'll Likely Need

• Powertrain Control Module (PCM) Reflash — This is not a physical part, but a software service. It is the most common and manufacturer-recommended fix for this specific issue on this vehicle, as per TSB #18-088-16 REV. A. Owners report dealer costs for this service typically range from $100 to $300.
  OEM price range: $150-$350
  Aftermarket price range: N/A
• Powertrain Control Module (PCM) (OEM #68190506AN) — In the rare event that a software reflash does not fix the issue, the PCM itself may have an internal hardware fault and require replacement. This should be a last resort after all other diagnostics have failed.
  Trusted brands: Mopar
  OEM price range: $500-$800
  Aftermarket price range: $300-$600
• Car Battery (OEM #Group Size H6 / Group 48) — A weak or failing battery can cause unstable voltage, leading to various electronic issues, including the P2610 code. It's a less common cause but an important secondary check.
  Trusted brands: Mopar, Interstate, DieHard
  OEM price range: $200-$350
  Aftermarket price range: $150-$250

Related Codes That Often Appear With This One

• P0335 - Crankshaft Position Sensor Circuit — This code is explicitly mentioned in TSB #18-088-16 REV. A alongside P2610. The PCM software glitch affects the logic related to the crankshaft sensor signal, often causing both codes to appear together.
• P0456 - EVAP System Small Leak — Also mentioned in TSB #18-088-16 REV. A. The EVAP system's self-test relies on the engine-off timer to know when to run. A faulty timer can cause the test to fail or run incorrectly, falsely triggering an EVAP code.
• U0140 - Lost Communication With Body Control Module — This code is also listed in the same TSB, suggesting the software issue can cause broader communication problems on the vehicle's data network.
• P1607 - PCM Internal Shutdown Timer Rationality — This is a very closely related code that points to the same internal timer function. It is often listed in TSBs for other FCA vehicles that call for a PCM reflash to fix timer performance.

Technical Service Bulletins (TSBs) & Recalls

• 18-088-16 REV. A: Addresses a condition where customers may experience a MIL, and codes P2610, P0335, P0456, and U0140 may be set. The prescribed fix is to reprogram the Powertrain Control Module (PCM) with updated software. This TSB applies to the 2014 ProMaster with the 3.6L engine.

Platform-Specific Known Issues

• A known software issue documented in TSB #18-088-16 REV. A causes P2610 to be set, often in conjunction with P0335, P0456, and U0140. The bulletin applies to 2014 Ram ProMaster models with the 3.6L engine and recommends a PCM software update as the corrective action.
• Owners on forums like ScannerDanner.com have encountered complex electrical issues on these vans, sometimes related to the under-hood fuse block, which can present with a variety of communication codes and strange symptoms like a stuck key.

Mechanic-Grade Diagnostic Values

• Ground Circuit Voltage Drop (Cranking) — expected: < 0.2 Volts. Failure: A reading above 0.2V indicates high resistance in the ground path between the battery and the engine block.
• Battery Voltage (Engine Off) — expected: > 12.3 Volts. Failure: Voltage below 12.3V suggests a discharged or weak battery that can cause PCM memory and timer issues.
• Alternator Charging Voltage (Engine Running at Idle) — expected: 13.5V - 14.5V. Failure: Voltage significantly outside this range indicates a charging system fault that can lead to electrical glitches and trigger P2610.

Scan Tool Commands That Help

• wiTECH: Reprogram PCM — This is the specific dealer-level service function required to execute the software update outlined in TSB #18-088-16 REV. A, which is the primary fix for code P2610 on this vehicle.

Wiring & Ground Locations

• Engine Block Ground — The main negative battery cable attachment point on the engine block.. This is the primary ground return path for the PCM and starting system. High resistance here, which can be found via a voltage drop test, can cause a host of electrical issues including PCM timer faults, even if a simple continuity check seems okay.
• Supplemental Frame Ground — A ground point on the vehicle frame, often located under the under-hood fuse box.. In cases of persistent electrical or starting issues, some owners have found the factory grounding to be insufficient. Adding an additional ground strap from a major component, like a starter motor bolt, to the frame has been shown to resolve these problems.

Real Owner Repair Stories

• YouTube video from user 'Alex EL' (2014 Ram ProMaster 2500) — No-start condition, starter was not getting enough ground to engage.
  ❌ Tried (didn't work) The video implies prior troubleshooting had failed to identify the root cause.
  ✅ What actually fixed it An additional ground cable was installed, running from one of the starter motor mounting bolts directly to the vehicle's frame near the fuse box. This provided a sufficient ground path and resolved the no-start issue.

When the Usual Fixes Don't Work

• While the TSB and common wisdom point to a PCM software reflash as the definitive fix for P2610, there is evidence that underlying physical electrical issues can be the true root cause. In one documented case on a 2014 ProMaster, a persistent no-start condition (often associated with the P2610/P0335 code cluster) was not resolved until a supplemental ground strap was physically added between the starter motor and the vehicle frame. This indicates that even with the correct software, a poor ground connection can prevent the system from operating reliably, and a physical wiring repair may be necessary in cases where a reflash does not solve the problem.

OEM Part Supersession History

• 68190506AN → Not specified, but related to 05150794AC — This is the specific OEM part number for the 2014 ProMaster 3.6L PCM.
  Heads up: Part number 05150794AC is listed as a 'generic number' for the 68190506AN module, suggesting it may be a valid cross-reference or internal identifier.