Is Your Chevrolet or GM Vehicle Running Poorly?
If your vehicle is suffering from erratic behavior, a persistent check engine light, or a no-start condition, a failing Engine Control Module (ECM) could be the culprit. The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose problems. This replacement Engine Control Module, part number 12663405, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency.
From the Diagnostic Bay
We had a 2014 Chevy Cruze come in with a P0171 (System Too Lean) code that just wouldn’t go away. The owner had already replaced the oxygen sensors, mass airflow sensor, and checked for vacuum leaks multiple times. Everything seemed fine. On a hunch, we monitored the fuel trim data directly from the ECM and noticed the short-term trims were jumping erratically, commanding the injectors to do things that didn’t make sense. After swapping in a known-good ECM, the fuel trims stabilized instantly and the car ran perfectly. It’s a classic case of a failing processor inside the module causing phantom issues that send you chasing ghosts. Don’t waste time and money on unnecessary parts; a faulty ECM can mimic many other failures.
Common Symptoms of a Failing ECM
- ✔️ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔️ Engine stalling, stumbling, or hesitating during acceleration.
- ✔️ Rough or inconsistent idling.
- ✔️ Noticeable decrease in fuel economy.
- ✔️ No-start or hard-starting conditions.
- ✔️ Transmission shifting problems or harsh shifts.
- ✔️ Loss of communication with diagnostic scan tools.
The Plug-and-Play Solution for Your GM Vehicle
Forget expensive dealership visits and the hassle of finding a local shop to program a new computer. We take the complexity out of the repair. When you order this module, we will flash it with the latest, most up-to-date software directly from GM. The key is that we program it using your vehicle’s specific VIN. This ensures that all factory settings, security information, and operational parameters are perfectly matched to your car, truck, or van. The result is a true plug-and-play installation. Simply disconnect the battery, swap the modules, reconnect the battery, and you’re ready to go. No additional programming is required.
Guaranteed Compatibility with Your 2013-2016 Trax Engine Module
This ECM is a direct replacement for a wide range of popular GM vehicles. While it is a perfect fit for the 2013-2016 Trax Engine Module, it also services many other models, restoring them to factory-spec operation. It is a direct replacement for the following part numbers: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. Please verify your part number and check the extensive fitment list below to ensure compatibility with your specific vehicle, including models like the Cruze, Sonic, Encore, Volt, and various GM trucks and vans.
Do I need to have this ECM programmed by a dealer?
No. This module comes fully programmed to your vehicle’s specific VIN before it is shipped. It is a plug-and-play solution, and no further dealer programming is required for it to function correctly.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. You can typically add this as a note during checkout or reply to your order confirmation email. We cannot ship the module until we receive your VIN.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM, then yes, this part will resolve the issue. However, it’s crucial to ensure a proper diagnosis has been performed, as the check engine light can be triggered by many other failing components like sensors or wiring issues.
What is the difference between an ECM, ECU, and PCM?
The terms are often used interchangeably. ECM (Engine Control Module) and ECU (Engine Control Unit) typically refer to the same computer. PCM (Powertrain Control Module) is a term for a more integrated unit that controls both the engine and the transmission. For this application, the terms refer to the same part.
Are any other steps required after installation?
In some cases, your vehicle may require a simple ‘idle relearn’ or ‘security relearn’ procedure, which can often be done without special tools. Instructions for these procedures are widely available online for your specific model. However, the core programming is complete and does not need a dealer visit.