Restore Your Cadillac’s Brainpower and Performance
Is your 2014-2016 Cadillac CTS running rough, throwing confusing check engine lights, or suffering from intermittent no-start conditions? The Engine Control Module (ECM) is the central computer of your vehicle, and when it fails, it can cause a host of frustrating and hard-to-diagnose problems. This isn’t just an inconvenience; it affects your car’s performance, fuel economy, and reliability. This listing is for a direct-replacement 2014-2016 CTS Engine Module, part number 12676230, that arrives at your door programmed and ready for installation.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2015 CTS that came into my bay with a complaint that would drive any owner crazy: it would randomly refuse to start, but only on warm afternoons. No codes, no warning lights. We checked the battery, starter, and fuel pump—all perfect. After hours of tracing wires, I hooked up a scope to the ECM’s main processor. Sure enough, as the engine bay heat-soaked, the ECM’s internal voltage regulation would falter, causing a complete shutdown. It was a classic case of thermal failure inside the module. We replaced it with a VIN-programmed unit like this one, and the problem was solved instantly. These intermittent issues are often the first sign of a failing ECM.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution.
- ✔ Persistent Check Engine Light (CEL)
- ✔ Engine stalling, stuttering, or misfiring
- ✔ Unexplained drop in fuel efficiency
- ✔ Car won’t start, or starts intermittently
- ✔ Harsh or incorrect shifting from the automatic transmission
- ✔ Communication error codes (like U0100)
- ✔ Internal module failure codes (such as P0601, P0606)
The Advantage of VIN-Specific Programming
Don’t waste time and money at the dealership. We take the hassle out of the replacement process. When you purchase this 2014-2016 CTS Engine Module, we use your vehicle’s Vehicle Identification Number (VIN) to load the latest, most stable software directly from GM. This ensures that all factory parameters for your specific engine, transmission, and options are correctly configured. It’s the key to a successful, trouble-free repair.
A Straightforward Guide to Installation
Replacing the ECM is a job most DIYers can handle with basic tools. Following these steps will help ensure a smooth installation.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
- Locate the ECM: On the Cadillac CTS, the ECM is typically found in the engine bay. Consult your vehicle’s service manual for the exact location.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and unplug them from the old module. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will need it for the new module.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harnesses back into the new ECM, ensuring they click securely into place. Reconnect the negative battery terminal.
- Final Steps: In many cases, a security relearn procedure or a Crankshaft Position (CASE) relearn may be required. This can often be done with a capable scan tool or by following a specific vehicle procedure.
Will This Fit My Vehicle?
This module is a guaranteed fit for the 2014-2016 Cadillac CTS and is also compatible with a wide range of other GM vehicles. It directly replaces part numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318. Please verify your part number or check the list below.
- ATS (2014-2016)
- CAMARO (2016)
- CANYON / COLORADO (2015-2016)
- CORVETTE (2014-2016)
- CTS (2014-2016)
- ESCALADE / ESCALADE ESV (2015-2016)
- SIERRA 1500 / SILVERADO 1500 (2014-2016)
- SUBURBAN 1500 (2015-2016)
- TAHOE (2015-2016)
- XTS (2014-2016)
- YUKON / YUKON XL 1500 (2015-2016)
Do I really need to provide my VIN?
Do I really need to provide my VIN?
Yes, this is a critical step. Your VIN allows us to program the module with the exact software your vehicle requires for proper engine, transmission, and emissions control. Without it, the module will not function correctly.
Is any additional programming needed after installation?
Our service covers the main engine programming. However, depending on your specific GM vehicle, you may need to perform a security relearn (for anti-theft) or a Crankshaft Variation (CASE) relearn. These procedures are often required and can be done with a compatible high-end scan tool.
What if my original part number is slightly different?
This module is a direct replacement for several part numbers, including 12692067, 12656993, and more, as listed above. Manufacturers often supersede part numbers. As long as your part number is on our compatibility list, this module will work perfectly.
Will this fix my failed emissions test?
If the emissions failure is due to an ECM-related fault (like a persistent check engine light or incorrect fuel mixture calculations), then yes, this module is the correct solution. It will restore the proper parameters needed to pass emissions testing.