Restore Peak Performance to Your Chevrolet Volt
Is your 2011-2015 Chevrolet Volt suffering from frustrating issues like a persistent check engine light, poor engine performance, or a no-start condition? The Engine Control Module (ECM), the central computer of your vehicle’s powertrain, is often the root cause. 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 lead to a cascade of problems that can sideline your vehicle. This replacement ECM, part number 12670335, is the definitive solution to get your Volt running smoothly and efficiently again.
From the Diagnostic Bay
We had a 2013 Volt come into the shop with a bizarre issue: it would intermittently refuse to start, but only on warm days after being driven. There were no consistent trouble codes, just a generic communication error that would clear itself. We checked wiring, grounds, and connectors for hours. Finally, on a hunch, we monitored the ECM’s internal temperature data. We found that as the module heated up in the engine bay, its processor would start to fail, cutting communication. Replacing the ECM with a pre-programmed unit like this one solved the problem instantly. It’s a reminder that electronic failures aren’t always straightforward, and a faulty module can mimic many other issues.
Symptoms of a Failing 2011-2015 Volt ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Complete no-start or intermittent starting problems.
- ✔ Noticeable decrease in fuel economy.
- ✔ Failure to pass state emissions testing.
- ✔ Error messages on the dashboard related to engine or stability control.
- ✔ Loss of communication with scan tools or other vehicle modules.
The Plug-and-Play Solution for Your GM Vehicle
Finding the right ECM is only half the battle. A new module from the dealership requires expensive towing and programming appointments. Our process eliminates that hassle. When you order from us, we use the Vehicle Identification Number (VIN) you provide to flash the module with the latest, most stable GM-approved software specifically for your car’s configuration. This ensures that it works seamlessly with your existing components right out of the box. No extra programming is needed; in most cases, a simple key relearn procedure is all that’s required to get you back on the road.
Broad Compatibility Beyond the Volt
While this is a primary solution for the 2011-2015 Volt ECM, this versatile module (part number 12670335) is also a direct replacement for a wide range of other GM vehicles and part numbers. It is compatible with part numbers 12668866, 12668994, 12643636, 12663405, 22819494, and 12692200. This module is found in popular models such as the Chevrolet Cruze, Sonic, Trax, Spark, Silverado, and Express Van, as well as the Buick Encore and GMC Sierra/Savana. Please verify the part number or consult the fitment list to ensure this is the correct component for your specific vehicle.
Frequently Asked Questions
Do I need to program this ECM?
No. This Engine Control Module comes fully programmed to your vehicle’s specific VIN. We handle all the flashing and software updates before shipping, so it’s ready for installation upon arrival.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your car. It contains critical information about the model, engine, transmission, and factory-installed options. We use the VIN to load the exact software your vehicle requires for all systems to function correctly.
Will this part fix my car’s problem for certain?
This ECM will resolve any issue directly caused by a faulty engine computer. However, it’s crucial to ensure your vehicle has been properly diagnosed. Problems like bad wiring, faulty sensors, or fuel system issues can mimic ECM failure. We recommend a thorough diagnosis by a qualified technician before ordering.
Is any additional setup required after installation?
After installing the programmed ECM, you will likely need to perform a security relearn procedure, also known as a key relearn. This syncs the new computer with your vehicle’s anti-theft system and keys. This procedure can typically be done without special tools and instructions are widely available online.
Where is the ECM located on a 2011-2015 Chevy Volt?
On the Chevrolet Volt for these model years, the gasoline Engine Control Module is located in the left-hand (driver’s side) rear of the engine compartment.