If you’re dealing with frustrating and unpredictable issues in your Jeep, Dodge, or Chrysler vehicle, the Engine Control Module (ECM), often called the Powertrain Control Module (PCM), is a primary suspect. As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing computer can cause symptoms that mimic everything from a bad fuel pump to a faulty transmission. This isn’t just a part; it’s the brain of your vehicle, and when it falters, the entire system suffers. That’s why we offer a dependable, direct-fit solution with this 2007-2010 Compass Engine Computer.
Forget the expensive and time-consuming trip to the dealership. We eliminate the biggest hurdle in ECM replacement: programming. Each module is professionally flashed with your vehicle’s specific VIN and current mileage before it ships. This means it arrives at your door completely ready for installation—no special tools, no subscription fees, no towing bills. It’s a true plug-and-play fix designed to get you back on the road with confidence and restore your vehicle’s original performance and reliability.
From the Diagnostic Bay: The Phantom No-Start
A customer brought in their 2009 Jeep Patriot, a vehicle that shares its platform with the Compass. The complaint was an intermittent no-start condition that had them stumped for weeks. They had already replaced the battery and starter. Another shop suggested it was the fuel pump. After hooking up my scan tool, I noticed communication with the PCM was dropping out sporadically. There were no fuel pressure codes, but a U0100 (Lost Communication with ECM/PCM) code was stored. Instead of just throwing parts at it, we inspected the PCM connectors for corrosion—they were clean. The root cause was internal failure of the engine computer itself. Installing a pre-programmed module like this one resolved the issue in under an hour, saving the customer from spending hundreds more chasing the wrong problem.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in numerous ways, often making diagnosis difficult. If you’re experiencing any of the following, your engine computer is likely the culprit:
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained stalling, especially when coming to a stop or at idle.
- ✔ A noticeable drop in fuel economy.
- ✔ Rough idling or misfiring that isn’t solved by new spark plugs or coils.
- ✔ Seemingly unrelated warning lights on the dashboard (e.g., ABS, traction control).
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ No communication with your OBD-II scan tool.
A Straightforward Guide to Installation
Replacing your engine computer is a manageable job for a confident DIYer. Our plug-and-play programming makes it even simpler. Follow these general steps to get your vehicle running smoothly again.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow capacitors to discharge before starting work.
- Locate the ECM: On most Compass, Patriot, and Caliber models, the ECM is located in the engine bay, typically mounted to the firewall or inner fender. It’s a metal box with several large electrical connectors.
- Disconnect the Connectors: Carefully release the locking tabs on each wiring harness connector and pull them straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. There are usually a few 8mm or 10mm bolts holding it in place.
- Install the New Module: Mount your new, pre-programmed 2007-2010 Compass Engine Computer in the same location and secure it with the original bolts.
- Reconnect Everything: Firmly plug the wiring harness connectors back into the new ECM until they click and the locking tabs are secure. Reconnect the negative battery terminal.
- Final Step: Turn the key to the ‘ON’ position (without starting the engine) for 30 seconds, then turn it off. Repeat this cycle three times. This allows the vehicle’s other modules to recognize the new ECM. Your vehicle is now ready to start.
Verified Vehicle Compatibility
This engine control module is a direct-fit replacement for a wide range of vehicles. Please confirm your model and engine options below to ensure proper fitment. This part replaces numerous original part numbers, including 05150471AA, 68043260AA, 68043260AD, 68028201AC, and more.
- Jeep Compass: 2007, 2008, 2009, 2010 (Electronic Control Module)
- Jeep Patriot: 2007, 2008, 2009, 2010 (Electronic Control Module)
- Dodge Caliber: 2007, 2008 (Electronic Control Module)
- Dodge Caliber: 2009 (1.8L, 2.0L Gasoline, 2.4L with engine opt ED3)
- Dodge Caliber: 2010 (2.0L, 2.4L)
Choosing a reliable, correctly programmed 2007-2010 Compass Engine Computer is the most critical step in resolving complex electronic issues and restoring your vehicle’s health.
Frequently Asked Questions
What does ‘Plug and Play’ mean for this ECM?
It means the engine computer you receive has been professionally programmed with your vehicle’s specific VIN and mileage. Once installed, it will communicate with your vehicle’s systems correctly without needing any additional programming from a dealer or mechanic, saving you time and money.
Do I need to send my old computer (core) back?
Please check the specific terms of your purchase on the product page. Often, a core charge is included to encourage the return of the old part, which can then be properly recycled. Core return instructions are typically included with your order.
Is this a guaranteed fix for my vehicle’s problems?
While this ECM resolves the vast majority of issues listed, proper vehicle diagnosis is key. We recommend confirming the ECM is the faulty component before ordering. If you’re unsure, consulting a professional mechanic or our support team can provide additional guidance.
Will this computer work with my vehicle’s anti-theft system (SKIM)?
Yes. During the programming process, we sync the module to your VIN, which includes the security information. When installed, it will integrate seamlessly with your existing keys and anti-theft system.
How long does the installation take?
For someone with basic mechanical skills, the physical replacement of the module typically takes less than 30 minutes. Since no programming is required, the entire job can be completed in under an hour.
What if I provide the wrong VIN?
Providing the correct VIN is absolutely critical. An incorrect VIN will result in a computer that will not start or run your vehicle properly. Please double-check the VIN from your driver’s side door jamb or dashboard before submitting your order.