2018-2019 Grand Cherokee & Durango 3.6L Engine Control Module: Stalling, Recalls, and Programming
This guide covers the critical details of diagnosing, replacing, and programming the Engine Control Module (ECM) for the 2018-2019 Jeep Grand Cherokee and Dodge Durango with the 3.6L V6 engine.
- This ECM requires mandatory programming to your vehicle's VIN for it to function; it is not a plug-and-play part.
- Check for open recalls, specifically NHTSA 18V-332 (cruise control) and 18V-524 (stalling), as the repairs are free at a dealer.
- When buying used, you must match the Mopar part number exactly (e.g., 68330924AA).
- A used ECM can be programmed by a dealer, a properly equipped independent shop, or a mail-in service before installation.
Symptoms of a Failing ECM
A failing Engine Control Module in your 2018-2019 Jeep Grand Cherokee or Dodge Durango can manifest in several ways. Because the ECM controls so many critical functions, symptoms can be dramatic and varied.
- Check Engine Light: This is often the first sign. Specific codes pointing to the ECM itself (like P0601 or P0606) are a strong indicator. 🎬 Watch: How to diagnose a P0606 processor error code.
- Engine Stalling or No-Start: The vehicle may stall unexpectedly while driving, or it may crank but refuse to start. This can be intermittent at first.
- Poor Engine Performance: You might notice a sudden drop in fuel economy, rough idling, hesitation during acceleration, or a general lack of power.
- Misfires: The ECM controls ignition timing and fuel injectors. A faulty module can cause cylinders to misfire, leading to a rough-running engine.
- Communication Issues: Other modules in the vehicle may lose communication with the ECM, leading to various warning lights on the dashboard, such as for the ABS or stability control.
Known Issues, Recalls, and Technical Service Bulletins (TSBs)
Several important software updates and recalls have been issued for these vehicles that involve the Engine Control Module.
Recalls
NHTSA Recall 18V-332 (FCA Campaign U65): This major recall affects a wide range of FCA vehicles, including the 2018 Grand Cherokee and Durango. A short circuit could prevent the cruise control from disengaging, potentially causing the vehicle to maintain speed or accelerate without driver input. The fix is a software flash for the ECM. Owners are advised not to use cruise control until this update is performed.
NHTSA Recall 18V-524 (FCA Campaign U87): This recall addresses a potential failure of the ECM itself in certain 2018 Grand Cherokee and Durango models. A voltage regulator chip on the circuit board could fail, leading to a no-start condition or engine stalling while driving. The remedy is to replace and reprogram the entire ECM.
Technical Service Bulletins (TSBs)
Manufacturers issue TSBs to help technicians diagnose and fix common problems that aren't necessarily safety recalls. Several TSBs have been released to address software glitches and performance issues related to the ECM and other control modules in these vehicles. These updates can fix issues like rough idle, incorrect shifting, and false warning lights. If you experience persistent electronic issues, ask your dealer to check for any applicable TSBs that involve a PCM or TCM (Transmission Control Module) flash.
Pro Tip: Even if your vehicle is out of warranty, dealers are required to perform safety recall services free of charge. You can check for open recalls on your specific vehicle using your VIN on the NHTSA website.
Buying a Used Engine Control Module (ECM)
A used OEM ECM can be a cost-effective solution, but it's critical to understand the requirements. This is not a simple plug-and-play part.
- Part Number is Everything: You MUST match the OEM part number exactly. The primary part number for this application is 68330924AA. Other numbers may exist, but they must be verified as interchangeable. Do not rely on visual appearance alone.
- Programming is Mandatory: A used ECM must be programmed to your vehicle's specific Vehicle Identification Number (VIN). It is also linked to the anti-theft system (SKIM). Without proper programming, the vehicle will not start.
- Who Can Program It? A Chrysler/Jeep/Dodge dealership is the most reliable option. Some well-equipped independent shops with the proper wiTECH diagnostic tools can also perform the programming. Many online sellers of used ECMs also offer a mail-in service where they program the module to your VIN before shipping it to you, making it a "plug and play" installation.
- Physical Inspection: When buying a used unit, inspect the case for any signs of physical damage, corrosion, or evidence that it has been opened. Check the connector pins to ensure they are straight and clean.
- Source Vehicle: If possible, get the module from a vehicle with the same engine (3.6L V6) and drivetrain configuration. While programming can align many parameters, starting with the closest possible match is always best.
Warning: Because these vehicles from 2015 and newer have a locked PCM, some advanced tuning or modifications require the module to be physically unlocked before it can be custom programmed. This is a separate process from the standard VIN programming required for a replacement.
Cost Breakdown
Prices can vary based on location, supplier, and the included services (like pre-programming).
| Part Type | Estimated Cost |
|---|---|
| New OEM (Mopar) | $330 - $475 + $125 Core Charge |
| Used OEM (Recycled) | $50 - $200 (will require programming) |
| Remanufactured / Pre-Programmed | $250 - $500 |
| Shop Labor (Replacement) | $100 - $150 |
| Shop Labor (Programming Only) | $150 - $300 |
Frequently Asked Questions (FAQ)
Where is the ECM located on the 2018-2019 Grand Cherokee and Durango?
On both the Jeep Grand Cherokee and Dodge Durango with the 3.6L engine, the ECM is typically located in the engine bay, mounted to the vehicle's body, often near the battery or firewall. It is a metal box with large electrical connectors. The replacement procedure involves disconnecting the battery, unplugging the connectors, and unbolting the module.
🎬 Watch this walkthrough for locating and replacing the module and fuses.Do I have to go to the dealer to get a new ECM programmed?
While a dealership is a guaranteed option, you are not strictly limited to them. Many independent auto repair shops that specialize in Chrysler/Dodge/Jeep vehicles have the necessary scan tools (like wiTECH) and subscriptions to perform programming. Additionally, numerous online retailers sell pre-programmed ECMs that are ready for installation upon arrival.
Can a bad ECM cause transmission problems?
Yes. The ECM (or PCM) works in constant communication with the Transmission Control Module (TCM) to manage shifting. A faulty ECM can send incorrect data, leading to harsh shifting, failure to shift, or incorrect gear selection. Sometimes, a software update (flash) can resolve these communication issues.
What's the difference between an ECM, PCM, and ECU?
The terms are often used interchangeably, which can be confusing. ECU (Engine Control Unit) is a generic term for any electronic control unit. ECM (Engine Control Module) specifically controls engine functions. PCM (Powertrain Control Module) is the most accurate term for these vehicles, as it controls both the engine and the automatic transmission. However, you will see all three terms used in service literature and parts listings.
Helpful Videos
Technical Specifications
OEM Part Numbers: 68330924AA 68412690AE P68330924AA 68325564AH
Fits 2018-2019 Jeep Grand Cherokee and Dodge Durango models equipped with the 3.6L V6 Pentastar engine.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Jeep Grand Cherokee:
- Dodge Durango: