Restore Peak Performance to Your Chevrolet Volt
Is your 2011-2015 Chevrolet Volt experiencing perplexing engine issues, a persistent check engine light, or erratic behavior? The Engine Control Module (ECM), the brain of your vehicle’s gasoline engine, is often the culprit. This vital component manages everything from fuel injection and ignition timing to emissions control and communication with other vehicle systems. When it fails, it can cause a cascade of problems that are frustrating and difficult to diagnose. This replacement Engine Control Module, part number 12668866, is the definitive solution to get your vehicle running smoothly and reliably again.
From the Diagnostic Bay
We had a 2013 Chevy Volt come into the shop with a complaint that stumped a few other technicians. The car would run perfectly for days, then suddenly the gas engine would refuse to start, leaving the owner stranded once the battery was depleted. There were no consistent trouble codes, just a few random communication errors. After hours of chasing wires and testing sensors, we focused on the ECM. On the surface, it seemed fine. But by monitoring live data during a test drive, we saw the fuel trim values spike erratically just before the engine would cut out. We swapped in a known-good, properly programmed ECM, and the problem vanished. It was a classic case of internal ECM failure that doesn’t always throw a clear code, highlighting how a failing module can mimic a dozen other issues.
Why Choose Our Pre-Programmed 2011-2015 Volt ECM?
Replacing an ECM isn’t just about swapping hardware. The module must be programmed with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM-certified software. Our service eliminates the need for an expensive trip to the dealership. We handle the programming for you before the part ever leaves our facility. Simply provide us with your VIN during checkout, and you’ll receive a module that is truly plug-and-play. This process ensures all factory settings are correct, immobilizer and security systems are properly synced, and your engine operates exactly as the manufacturer intended.
Common Symptoms of a Failing ECM
If you’re experiencing any of the following issues, a faulty ECM could be to blame. This module is a direct replacement for a wide range of GM vehicles, including the Chevy Cruze, Sonic, Trax, and Buick Encore, that exhibit similar symptoms.
- ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
- ✔ Engine cranks but fails to start.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Misfire codes (e.g., P0300, P0301) that persist after replacing plugs and coils.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Intermittent electrical issues or warning lights on the dash.
Guaranteed Fitment and Compatibility
This ECM is a direct replacement for multiple GM part numbers, ensuring broad compatibility. It is guaranteed to fit and function correctly in the vehicles listed below, provided the part number matches. Please verify your original part number before ordering. Compatible part numbers include: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. This part is a fit for the 2011-2015 Volt ECM as well as numerous other GM models such as the Cruze, Sonic, Trax, Encore, Silverado, Sierra, and Express/Savana vans. Refer to the detailed fitment list to confirm compatibility with your specific year, make, and model.
Frequently Asked Questions
Do I need to do any programming after I receive this ECM?
No. We program the module with your vehicle’s VIN and the latest GM software before shipping. It will arrive ready for installation. In some cases, a security or crankshaft position sensor relearn procedure may be required, which can be done with a capable scan tool.
Where do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information.
Is this a new or used part?
This is a high-quality, tested, and guaranteed functional recycled OEM part. Each unit is inspected and programmed to ensure it meets or exceeds original factory specifications.
What is the warranty on this module?
This part comes with our standard warranty, guaranteeing it to be free from defects upon arrival and for the duration of the warranty period. Please see our warranty page for full details.
Will this fix my car’s problem?
This ECM will fix any issues directly caused by a faulty engine computer. However, it is crucial to have your vehicle properly diagnosed by a professional mechanic to ensure the ECM is the true source of the problem before purchasing.