Is Your 2002 Jeep Liberty Running Rough, Stalling, or Refusing to Start?
A failing Engine Control Module (ECM) can be the hidden cause of countless frustrating issues, turning your reliable Jeep into a source of constant worry. If you’re dealing with a persistent check engine light, poor performance, or intermittent problems that mechanics can’t seem to pin down, you’ve come to the right place. This pre-programmed 2002 Jeep Liberty 3.7L Engine Computer 56041606AH is the definitive solution to restore your vehicle’s performance and get you back on the road with confidence.
Common Symptoms of a Failing 2002 Liberty ECM
A faulty engine computer can manifest in numerous ways, often mimicking other sensor or component failures. Replacing parts without addressing the root cause can be costly and time-consuming. Look out for these classic indicators of a bad ECM:
- Persistent Check Engine Light (CEL) with communication-related Diagnostic Trouble Codes (DTCs).
- Engine stalling, stumbling, or hesitating during acceleration.
- Noticeable drop in fuel economy.
- Rough or erratic idling.
- Transmission shifting problems or getting stuck in gear.
- Complete no-start condition where the engine cranks but won’t turn over.
This replacement unit is engineered to resolve these issues by restoring the critical link between your vehicle’s sensors and its engine management system. It’s the core of your Liberty’s brain, and we provide a fully functional, correctly programmed replacement.
Features & Benefits
- ✔ No Dealer Visit Needed: This computer arrives fully programmed to your vehicle’s specific VIN and mileage. It’s a true Plug & Play solution, saving you a trip to the dealership and their costly programming fees.
- ✔ Easy, Hassle-Free Installation: Simply disconnect the negative battery terminal, unplug your old module, and connect this one. No complicated procedures or special tools are required to get your Liberty running properly again.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for part numbers 56041606AB, 56041606AD, 56041606AG, and 56041606AH, ensuring a perfect fit and function for your 3.7L automatic Liberty.
- ✔ Restored Performance & Efficiency: A properly functioning ECM ensures your engine is receiving the correct signals for fuel delivery, spark timing, and emissions control, restoring lost power and fuel economy.
- ✔ One-Year Replacement Protection: Drive with confidence knowing This unit is backed by our one-year replacement warranty.
An Expert’s Note on Jeep Liberty ECMs
The 2002 Jeep Liberty’s ECM is located in the left-hand (driver’s side) engine compartment. Over years of service, this location exposes the unit to significant engine heat and constant vibration. These two factors are the leading cause of internal component and circuit board failure. Often, symptoms will be intermittent at first—perhaps the vehicle only stalls after it’s fully warmed up. This is a classic sign of heat-related failure within the computer. Our 2002 Jeep Liberty 3.7L Engine Computer 56041606AH provides a stable, reliable replacement to permanently fix these frustrating, temperature-sensitive issues.
Frequently Asked Questions
Is this unit truly Plug & Play?
Yes. During checkout, we require your vehicle’s VIN and current mileage. We use this information to program the computer so that it matches your Jeep’s specific configuration. When it arrives, you simply install it, and it will work with your existing keys and systems without any further programming.
What information do you need from me to program it?
We need your vehicle’s 17-digit Vehicle Identification Number (VIN) and the exact mileage you’d like programmed onto the unit. Please double-check this information for accuracy to ensure a seamless installation.
Will this fix my check engine light?
This module will resolve any Diagnostic Trouble Codes (DTCs) that are directly caused by a faulty engine computer. After installation, it’s recommended to clear all codes. If other codes return, it indicates separate issues with other sensors or components on the vehicle that will need to be addressed.
Where is the ECM located on my 2002 Jeep Liberty?
The Electronic Control Module is located in the engine compartment on the driver’s side, typically mounted to the firewall or inner fender.
How do I confirm my old ECM is the problem?
While the symptoms listed above are strong indicators, the best way to be certain is through a professional diagnosis. Mechanics can test the computer’s power, ground, and communication signals. However, if you’ve already replaced related sensors without success, the ECM is the most likely culprit.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty. This provides coverage for the part itself, giving you peace of mind with your purchase.