2016-2017 Jeep Grand Cherokee ECM: Programming, Problems, and Replacement Guide
This guide covers the critical programming requirements, known issues, and common failure points for the 2016-2017 Jeep Grand Cherokee 3.6L V6 Engine Control Module.
- A replacement ECM for a 2016-2017 Grand Cherokee MUST be programmed to the vehicle's VIN to function.
- The vehicle will not start if the ECM is not programmed due to the anti-theft immobilizer system.
- Many companies sell used or remanufactured ECMs pre-programmed to your VIN, offering a 'plug-and-play' solution that avoids a dealer visit.
- Before replacing the ECM, ensure the issue isn't a software problem that can be fixed with a dealer reflash, as per existing TSBs.
Symptoms of a Failing 2016-2017 Grand Cherokee ECM
A failing ECM can cause a wide range of confusing and often intermittent symptoms. Because the ECM controls so many different systems, its failure can mimic other problems. Be on the lookout for:
🎬 Watch: A visual guide to common bad ECM symptoms- Check Engine Light: This is the most common symptom. The light may be on constantly, or it may come and go. Specific diagnostic trouble codes (DTCs) are needed to narrow down the problem.
- Engine Stalling or Misfiring: The engine may stall unexpectedly while driving or at idle. You might also feel a stutter or hesitation during acceleration.
- No-Start Condition: The engine may crank but refuse to start. This can happen if the ECM is not properly commanding the fuel injectors or ignition coils to fire.
- Poor Engine Performance: You may notice a sudden drop in fuel economy, a loss of power, or rough and irregular shifting in the automatic transmission.
- Multiple Unrelated Warning Lights: If you see a variety of warning lights on the dashboard (e.g., ABS, traction control, etc.) in addition to the check engine light, it can sometimes point to a failing ECM that is disrupting communication between different vehicle modules.
Common Diagnostic Trouble Codes (DTCs)
While many codes can be triggered by a faulty ECM, codes in the P0600-P0699 range specifically point to the computer and its output circuits. Pay special attention to codes like:
- P0601: Internal Control Module Memory Check Sum Error
- P0606: ECM/PCM Processor Fault
- P0622: Alternator Field Control Circuit (A common issue on Jeeps where the PCM controls charging).
Known Issues, Recalls, and Technical Service Bulletins (TSBs)
While there are no recalls specifically for ECM failure on the 2016-2017 Grand Cherokee, there are several important software-related campaigns.
- NHTSA Campaign 18V332000: This major recall addressed a software issue where the cruise control might not disengage. The fix was a software flash for the ECM, performed by dealers free of charge. If you are buying a used ECM, it's impossible to know if it has had this update performed.
- TSB 18-049-20: This Technical Service Bulletin was released to address various issues that could be fixed by reprogramming the PCM with the latest software, often triggered by a Malfunction Indicator Lamp (MIL) illumination.
- EcoDiesel AEM: For vehicles with the 3.0L EcoDiesel engine, a software update for the emissions system was offered as part of a settlement. This was a software-only change to the ECM.
Pro Tip: Many driveability problems on these vehicles are not caused by a failed ECM, but by outdated software. Before condemning the module, ensure it has the latest software updates from the manufacturer. A dealership or a well-equipped independent shop can check this for you.
Buying a Used 2016-2017 Grand Cherokee ECM
Purchasing a used ECM can be a cost-effective solution, but it requires careful attention to detail. Given the complexity of this part, a used OEM module is often a more reliable choice than a new, unproven aftermarket unit.
- Part Number Verification: The part number on the replacement module should be a close match to your original. The initial part numbers like 68243326AA were superseded by newer versions like 68243326AB. Many different part numbers can be made compatible through programming.
- Physical Inspection: When you receive the used module, inspect it carefully. Look for any signs of physical damage, corrosion on the pins, or evidence that the case has been opened. Water intrusion is a potential cause of failure, so check for any rust or water marks.
- Vendor Programming: Many online sellers of used and remanufactured ECMs offer to program the unit to your vehicle's VIN before shipping it. This makes the unit "Plug and Play," saving you a trip to the dealer. You will need to provide your vehicle's VIN at the time of purchase.
Warning: A used ECM from a junkyard that has not been programmed to your VIN will NOT work. The vehicle will not start due to the anti-theft system (immobilizer). The module must be programmed.
Programming and Installation
This is the most critical part of replacing the ECM in a 2016-2017 Grand Cherokee. The ECM is linked to the vehicle's immobilizer system.
- VIN Programming is Required: The replacement ECM must be programmed with your vehicle's specific Vehicle Identification Number (VIN). This process syncs the ECM with the other modules in the car, including the key and the immobilizer.
- Who Can Program It?
- Jeep Dealerships: Dealers have the factory tool (wiTECH) and can always perform the programming.
- Independent Shops: Many independent repair shops have professional-grade scan tools (like Autel or Snap-on) and a subscription to Tech Authority (Chrysler's technical information service) that allow them to program a new or used ECM. 🎬 See how a professional programs a Jeep engine computer
- Mobile Locksmiths: Some advanced automotive locksmiths have the tools to program keys and modules, but you must verify their capabilities for this specific vehicle and module beforehand.
- DIY: Physical installation is straightforward, but programming is not a DIY job without access to expensive professional tools and software subscriptions.
Cost Breakdown
Prices can vary based on your location and the chosen repair path. Here are some typical cost ranges:
| Part or Service | Estimated Cost |
|---|---|
| New OEM (Mopar) | $580 - $850 (plus core charge) |
| New Aftermarket | $400 - $600 |
| Used OEM (Recycled) | $150 - $300 |
| Remanufactured (Pre-programmed) | $280 - $450 |
| Shop Labor (Installation & Programming) | $100 - $250 |
Frequently Asked Questions (FAQ)
Do I have to take my Jeep to the dealer to replace the ECM?
Not necessarily. While a dealer can always do the job, many qualified independent shops and some mobile automotive programmers have the tools and software to program a replacement ECM to your vehicle. However, you cannot simply install a used ECM without programming; the vehicle will not start.
What happens if I install an ECM without programming it?
The engine will not start. The ECM is tied into the vehicle's anti-theft immobilizer system. If the ECM does not recognize the VIN and the secret key code shared between modules, it will prevent the engine from running to prevent theft.
Does the part number on the ECM need to match exactly?
It is best to get a part number that is as close as possible, but it does not always have to be an exact match. Chrysler frequently updates part numbers. For example, part number 68243326AA was replaced by 68243326AB. Many remanufacturers state that their modules replace several hardware numbers. The critical factor is that the module is for the correct engine (3.6L V6) and that it is correctly programmed to your VIN.
Where is the ECM located on a 2016-2017 Grand Cherokee?
The ECM (or PCM) is located in the engine bay, on the passenger side, near the front next to the main fuse box. It is a silver metal box with three large electrical connectors.
🎬 Watch this walkthrough of a Jeep PCM swap and installationHelpful Videos
Technical Specifications
OEM Part Numbers: 68243326AA 68243326AB 68284453 68284454 68284455 68284456 68284456AD 68322417 68322418 68322419 68322420 68243322AA 5150767AC
Fits 2016-2017 Jeep Grand Cherokee with 3.6L V6 engine and automatic transmission. Compatible with both Rear-Wheel Drive (RWD) and Four-Wheel Drive (4WD/AWD) models.
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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:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of a Failing 2016-2017 Grand Cherokee ECM
- Common Diagnostic Trouble Codes (DTCs)
- Known Issues, Recalls, and Technical Service Bulletins (TSBs)
- Buying a Used 2016-2017 Grand Cherokee ECM
- Programming and Installation
- Cost Breakdown
- Frequently Asked Questions (FAQ)
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