Restore Peak Performance to Your Vehicle
Is your Cadillac CTS, or another compatible GM vehicle, suffering from perplexing issues like a persistent check engine light, stalling, poor fuel economy, or a no-start condition? These are classic symptoms of a failing Engine Control Module (ECM), the central computer that manages your engine’s most critical functions. A faulty ECM can disrupt everything from fuel delivery and ignition timing to transmission shifting and emissions control, leading to frustrating and potentially damaging performance problems. This replacement Engine Control Module, service number 12602044, is the definitive solution to restore your vehicle’s reliability and drivability.
From the Diagnostic Bay
We had a 2006 Cadillac CTS V-Series towed in that was driving the owner crazy. It would run fine for days, then suddenly start misfiring, lose power, and throw a half-dozen random communication codes. The owner had already replaced spark plugs, coils, and even a throttle body with no success. After hooking up our diagnostic scanner, we noticed intermittent communication drops with the ECM. We couldn’t even reliably flash it. On a hunch, we connected a known-good, pre-programmed module. The car fired up instantly and ran perfectly. The original ECM had an internal processor fault that only showed up when it got hot. This case highlights how a failing ECM can mimic many other component failures, making accurate diagnosis key.
Symptoms of a Failing Engine Control Module
- ✔ Persistent Check Engine Light (CEL) with various codes, especially P0600-P0606 series.
- ✔ Unexplained engine stalling or hesitation during acceleration.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Engine cranks but refuses to start.
- ✔ Rough or erratic idling.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Loss of power and poor overall performance.
Why Choose Our 2006 CTS Engine Control Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The biggest hurdle in replacing a modern ECM is the complex programming required to make it communicate with your specific vehicle. We eliminate that problem entirely. When you order, you provide us with your vehicle’s VIN. Our technicians then flash the module with the latest, most stable GM-approved software specific to your car’s configuration. This ensures that all systems, from the engine and transmission to the anti-theft system, function exactly as the factory intended. You receive a module that is truly prepared for your vehicle, saving you hundreds of dollars in dealership programming fees and diagnostic time.
This module is a direct replacement for a wide range of GM vehicles and is interchangeable with service numbers 12590032, 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737. By providing your VIN, you guarantee you receive a perfectly matched and updated computer for your car.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows our technicians to access the exact factory software and calibration files for your specific vehicle. This includes information about the engine, transmission, and all factory-installed options. Programming the ECM with this data ensures it works seamlessly with your car right out of the box.
Is this ECM difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and swapping the old module with the new one. However, after installation, you will likely need to perform a security relearn procedure (often called a Passlock or anti-theft relearn) to sync the new ECM with your vehicle’s keys. This procedure can usually be done without special tools and instructions are widely available online.
Do I need a dealer to program this part?
No. The main benefit of our service is that we handle all the programming for you before we ship the part. This saves you the time, expense, and hassle of a trip to the dealership for programming.
What if my original part number is different from 12602044?
That’s perfectly fine. This ECM is a direct replacement for several service numbers, including 12590032, 12603530, and others listed in the description. As long as your original part number is on our interchange list and you provide your VIN, we guarantee compatibility.
Will this fix my car’s problem for certain?
While this module will fix issues caused by a faulty ECM, it’s crucial that the vehicle has been properly diagnosed. A failing ECM can share symptoms with other bad parts, like sensors or wiring. We recommend a thorough diagnosis by a qualified mechanic to confirm the ECM is the root cause of the problem.