Is Your Chevy Volt Experiencing Frustrating Electrical Problems?
If you’re dealing with a persistent check engine light, unexplained stalling, rough idling, or a complete no-start condition in your 2011-2015 Chevrolet Volt, a failing Engine Control Module (ECM) is a very likely culprit. As the central computer for your vehicle’s powertrain, its health is critical for performance, fuel economy, and reliability. When it fails, it can feel like your advanced hybrid has a mind of its own.
A Technician’s Real-World Experience: “A customer’s 2013 Volt came in last week with intermittent stalling and a whole host of communication codes (U-codes) that would come and go. After checking the basics—power, grounds, and the CAN bus network—we isolated the issue to the ECM. The internal processor was failing under heat soak, a classic failure mode I’ve seen on dozens of these E78 controllers across the GM lineup. Replacing the module with a correctly programmed unit resolved every single issue instantly.”
The Simple, Dealer-Free Solution: A VIN-Programmed ECM
Forget the hassle and high cost of a dealership visit. We provide a direct-fit replacement 2011-2015 Volt Engine Control Module that arrives at your door ready for installation. Before we ship, our technicians use your vehicle’s VIN to program the module with the latest, most stable software updates directly from GM. This ensures seamless communication with your Volt’s other systems, including the hybrid controller, transmission, and security system.
- ✔ VIN-Specific Programming: We flash the module to your exact vehicle, ensuring 100% compatibility.
- ✔ Latest GM Software: Loaded with the newest updates to correct factory bugs and improve performance.
- ✔ Cost-Effective Repair: Avoid expensive diagnostic and programming fees at the dealership.
- ✔ Restores Performance: Eliminates common failure symptoms like stalling, error codes, and poor engine behavior.
- ✔ Broad Compatibility: This module, part number 12643636, is a direct replacement for several other part numbers, including 12668866, 12668994, 12663405, and more.
Plug-and-Play Installation: Get Your Volt Back on the Road
Installing your new ECM is a straightforward process that a confident DIYer or any professional mechanic can complete. While the core programming is done, some vehicles may require a simple security or crankshaft position sensor relearn procedure after installation, which can be done with many high-level scan tools.
- Safety First: Disconnect the negative terminal from your 12V battery.
- Locate the ECM: On the Volt, the gasoline engine ECM is typically found in the left rear of the engine compartment.
- Disconnect Harnesses: Carefully unlatch and remove the electrical connectors from the old module. Inspect them for any damage or corrosion.
- Swap the Modules: Unbolt the old ECM from its mounting bracket and secure the new one in its place.
- Reconnect Everything: Firmly plug the wiring harnesses into the new ECM and reconnect the negative battery terminal.
Expert Pro Tip: Before installing your new ECM, take a moment to inspect the wiring harness connectors for any signs of corrosion, moisture, or bent pins. A poor connection can mimic ECM failure and cause issues with the new part. Cleaning the connectors with a dedicated electronic cleaner is a 5-minute step that can save you hours of headaches.
Is This the Right Part for Your Vehicle?
This 2011-2015 Volt Engine Control Module is the correct component for your vehicle. It is also the specified replacement for a wide range of other GM cars, trucks, and vans like the Cruze, Sonic, Trax, Encore, and Silverado/Sierra with the 6.0L engine. Please verify your part number or consult the detailed fitment list on this page to ensure perfect compatibility. Upon purchase, simply provide us with your VIN, and we’ll handle the rest, delivering a part that’s truly ready to solve your problems.