Is Your Vehicle Running Rough or Not Starting?
The Engine Control Module (ECM), often called the Powertrain Control Module (PCM), is the central computer of your vehicle. It manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When it begins to fail, it can cause a wide range of frustrating and often misdiagnosed problems. If you’re experiencing erratic engine behavior, poor fuel economy, or a persistent Check Engine Light, a failing ECM could be the culprit. This replacement Engine Control Module, part number 12692200, is the definitive solution to restore your vehicle’s performance and reliability.
We had a 2015 Chevy Cruze come into the shop with a persistent random misfire code (P0300) and rough idle that the owner had been chasing for months. He had already replaced the spark plugs, ignition coil pack, and even the mass airflow sensor, with no improvement. After hooking up our diagnostic scanner and monitoring live data, we noticed the short-term fuel trims were wildly inconsistent. Instead of continuing to throw parts at it, we tested the ECM’s driver circuits and found an internal fault. We installed one of our pre-programmed modules, performed the security relearn, and the car ran perfectly. It’s a classic case of how a faulty computer can mimic mechanical or sensor failures, costing the owner time and money on unnecessary parts.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is illuminated with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Complete no-start or intermittent starting condition.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Rough or erratic idling.
- ✔ Transmission shifting problems or harsh engagement.
- ✔ Communication errors with diagnostic scan tools.
The Plug-and-Programmed Solution for Your 2014-2016 ELR Engine Control Module
Replacing an ECM isn’t just about swapping hardware. Modern vehicle computers are coded specifically to the Vehicle Identification Number (VIN) and the options your car was built with. Our service eliminates the most difficult part of the job. When you purchase this module, we will flash it with the latest, most stable software release from General Motors, specifically for your vehicle’s VIN. This ensures perfect compatibility and function right out of the box, saving you an expensive trip to the dealership for programming. This module is a direct-fit replacement for multiple part numbers, including 12668866, 12668994, 12643636, and 12692200, and fits a wide array of GM vehicles beyond the Cadillac ELR, such as the Chevy Cruze, Sonic, Trax, and various GMC/Chevy trucks and vans.
Installation is straightforward for a knowledgeable DIYer or any professional technician. After mounting the new module and connecting the electrical harnesses, a simple security relearn procedure is typically required to sync the new ECM with your vehicle’s anti-theft system. This can often be done without special tools, simply by cycling the ignition key. Once complete, your vehicle will be back on the road, running as the manufacturer intended.
Frequently Asked Questions
Do I need to have this module programmed?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s VIN during or after checkout, and we will flash the module with the correct GM software for your specific vehicle.
Is this part difficult to install?
The physical installation is typically simple, involving unbolting the old unit and plugging in the new one. However, a security relearn procedure (also known as a key relearn) will be necessary to allow your vehicle to start. Instructions for this procedure are widely available online or in service manuals.
How do I know if this ECM will fit my vehicle?
This module fits a wide range of GM vehicles. Please check the extensive fitment list on this page. The most reliable method is to match the part number on your original module to one of the compatible numbers listed (e.g., 12692200, 12668866).
What information do you need from me?
We require your vehicle’s 17-digit VIN (Vehicle Identification Number) to program the module correctly. You can typically find this on your driver’s side dashboard (visible through the windshield) or on your vehicle’s registration or insurance card.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty ECM, then yes, this will resolve the issue. It is crucial to have your vehicle properly diagnosed to confirm the ECM is the point of failure before ordering.