Restore Peak Performance to Your Chevrolet Volt
Is your 2011-2015 Chevrolet Volt suffering from baffling issues like intermittent stalling, poor fuel economy, a persistent check engine light, or a complete no-start condition? The problem often lies with the vehicle’s brain: the Engine Control Module (ECM). As a technician with over 20 years of experience, I’ve seen firsthand how a failing ECM can create a cascade of frustrating problems that are difficult to diagnose. This isn’t just a part; it’s the central command center for your Volt’s advanced powertrain, and when it falters, your vehicle’s reliability and efficiency suffer.
We offer a dependable and straightforward solution. This is a high-quality replacement 2011-2015 Volt Engine Control Module that arrives at your doorstep fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We flash it with the latest, most stable software updates directly from GM. This critical step ensures seamless integration, restoring the precise fuel, spark, and emissions control your Volt was designed for, without a costly trip to the dealership for programming.
A Technician’s Notebook: The Intermittent Volt
A customer brought in a 2013 Volt with a complaint that stumped two other shops: it would randomly refuse to start, but only after being driven for about 20 minutes. There were no consistent trouble codes, just a generic U0100 (Lost Communication with ECM) that would pop up occasionally. After checking all the wiring and connectors, I suspected the ECM itself was failing internally due to heat soak. The thermal stress was causing a micro-fracture on the circuit board. We installed one of our VIN-programmed modules, and the problem was solved instantly. The customer was thrilled to have their reliable car back, and it reinforced a key lesson: intermittent electronic issues on modern vehicles often point directly to the module itself.
Is Your Volt Showing These Telltale Signs?
A failing ECM can manifest in various ways. If you’re experiencing any of the following, this module is the likely solution:
- âś” Unexplained Check Engine Light illumination
- âś” Stalling, stumbling, or hesitation during acceleration
- âś” Vehicle refuses to start or has hard starting issues
- âś” Noticeable decrease in fuel efficiency
- âś” Transmission shifting erratically or harshly
- âś” Diagnostic Trouble Codes (DTCs) stored, such as P0601, P0606, or U0100
A Straightforward Guide to Installation
Replacing the ECM on your Volt is a manageable job for a DIY enthusiast. Follow these steps for a successful installation.
- Safety First: Always disconnect the negative terminal from your 12V battery and secure it away from the post to prevent any accidental reconnection.
- Locate the ECM: On the 2011-2015 Volt, the gasoline Engine Control Module is typically found in the left-hand (driver’s side) rear of the engine compartment.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and disconnect them from the old module. Inspect the connectors for any signs of corrosion or damage.
- Remove the Old Module: Unbolt the mounting hardware that secures the old ECM to its bracket. Remove the module from the vehicle.
- Install the New Module: Mount your new, pre-programmed ECM in place and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- Security Relearn Procedure: In some cases, a security or anti-theft relearn procedure may be required. This can typically be done without special tools by cycling the key in the ignition. (Turn key to ‘ON’ for 10 mins, ‘OFF’ for 10 secs, and repeat 2-3 times).
Verified Compatibility for Your Vehicle
This module is a direct-fit, programmed solution for the 2011-2015 Chevrolet Volt. It also serves as a replacement for a wide range of other GM vehicles that use the same E78 controller family, ensuring broad compatibility. It directly replaces part numbers 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. Please verify your vehicle from the list below:
- Chevrolet Volt: 2011-2015 (Gasoline Engine Module)
- Cadillac ELR: 2014-2016
- Chevrolet Cruze: 2012-2016 (1.4L & others, verify ID)
- Chevrolet Sonic: 2012-2016 (1.4L & others, verify ID)
- Chevrolet Trax: 2013-2016
- Buick Encore: 2013-2016 (1.4L)
- Chevrolet Spark: 2014-2015 (Gasoline)
- Chevy Express / GMC Savana Vans (2500/3500): 2016 (4.8L, 6.0L)
- Chevy Silverado / GMC Sierra (2500/3500): 2012-2016 (6.0L)
- …and other models listed in the original fitment data. Please provide your VIN to guarantee compatibility.
Why do I need to provide my VIN?
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) is essential because it allows us to program the Engine Control Module with the exact software and calibrations for your Volt’s specific options and features. This ensures perfect communication with other modules in your car and optimal engine performance, just like a new part from the factory.
Is this part difficult to install for a DIYer?
No, it’s a very manageable job. Since the module comes pre-programmed, the physical replacement is straightforward: disconnect the battery, unbolt the old unit, bolt in the new one, and reconnect the harnesses. The only additional step might be a simple key-cycle security relearn, which requires no special tools.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (common codes P0601, P0606, etc.), then yes, this part is the correct fix. However, if the light is on due to a separate issue like a bad sensor or emissions leak, that component will still need to be addressed.
What’s the benefit of the ‘newest updates from GM’?
Over a vehicle’s life, manufacturers release software updates to improve things like transmission shifting, fuel efficiency, and idle stability, or to fix small bugs found after the car was released. By flashing your module with the latest software, you’re getting all those improvements, ensuring your vehicle runs better than ever.
What part numbers does this module replace?
This ECM is a direct replacement for several part numbers, including 12692200, 12668866, 12668994, 12643636, 12663405, 12670335, and 22819494. Providing your VIN is the best way to ensure 100% correct fitment.