Restore Peak Performance to Your Chevrolet or Pontiac
Is your 2006 Chevrolet HHR, 2005-2006 Cobalt, or Pontiac Pursuit suffering from mysterious engine problems? A faulty Engine Control Module (ECM), often called a Powertrain Control Module (PCM), is frequently the culprit behind issues that mechanics can chase for hours. As the central computer for your vehicle’s engine, the ECM controls everything from fuel mixture and ignition timing to transmission shifting and emissions. When it fails, the symptoms can be frustrating and widespread, leaving your vehicle unreliable or completely immobile. This replacement ECM, part number 12589998, is the definitive solution to get your vehicle running like new again.
From the Diagnostic Bay
We recently had a 2006 HHR come into the shop with a persistent check engine light and a rough idle that would occasionally cause it to stall at red lights. The owner had already spent a small fortune replacing the spark plugs, ignition coils, and even the mass airflow sensor, but nothing worked. After connecting our diagnostic scanner, we noticed erratic data from multiple sensors and a U-code indicating a communication failure. Instead of throwing more parts at it, we tested the ECM’s power and ground circuits, which were fine. The final diagnosis pointed to an internal failure in the original ECM. After installing one of our pre-programmed units, the car immediately started, idled smoothly, and all the trouble codes were gone. It’s a classic case of treating the disease, not just the symptoms.
Is Your 2006 HHR ECM Failing? Common Symptoms
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following issues, a faulty ECM could be the root cause. Look out for these common warning signs:
- ✔ Check Engine Light: An illuminated Check Engine Light (CEL) is the most obvious sign. Codes related to module communication (U-codes), sensor circuits, or random misfires often point to the ECM.
- ✔ Engine Stalling or No-Start: The engine may crank but refuse to start, or it might stall intermittently while driving or idling.
- ✔ Poor Performance and Fuel Economy: You may notice a significant drop in gas mileage, hesitation during acceleration, or a general lack of power.
- ✔ Rough or Inconsistent Idle: The engine RPM may fluctuate erratically at a stop, or the idle may be rough and shaky.
- ✔ Automatic Transmission Issues: The ECM plays a role in transmission control. A faulty module can cause harsh shifting, delayed engagement, or getting stuck in one gear.
- ✔ Apparent Failure of Multiple Sensors: If your scanner shows codes for several unrelated sensors at once, it’s highly likely the computer itself is the problem, not the individual sensors.
The Plug-and-Play Advantage: A Programmed 2006 HHR ECM
The biggest challenge when replacing a modern vehicle’s computer is the programming. Simply installing a used module from another vehicle will not work, as it is coded to the original car’s specific options and anti-theft system. Our service eliminates this expensive and time-consuming hurdle. When you purchase this ECM, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then program the module with the latest, most up-to-date software directly from GM for your specific vehicle. This ensures complete compatibility with your engine, transmission, and all factory options. The unit arrives at your door ready for a straightforward, plug-and-play installation, saving you a costly trip to the dealership.
Guaranteed Compatibility
This ECM is a direct replacement for several service numbers. Please verify that your original module has one of the following numbers to ensure compatibility:
Compatible Service Numbers: 12599714, 12589998, 12597329, 12600882, 12600883, 12605766, 12605765
This part will fit these makes and models with these options:
- CHEVROLET HHR 2006: Electronic Control Module; (LH rear engine compartment), 2.2L
- CHEVROLET COBALT 2005-2006: Electronic Control Module; (LH front engine compartment), 2.2L
- PONTIAC PURSUIT 2005-2006: Electronic Control Module; (LH front engine compartment), 2.2L
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the ECM correctly. The VIN allows us to load the precise GM factory software for your vehicle’s specific engine, transmission, and options package. This ensures the module works perfectly right out of the box.
Is this ECM difficult to install?
Installation is typically straightforward for someone with basic mechanical skills. On the 2006 HHR, the ECM is located in the left-hand (driver’s side) rear of the engine compartment. The process involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in reverse order. No special tools are usually required.
Will I need to do any additional programming after installation?
No. This ECM is supplied fully programmed to your VIN. In most cases, it is a plug-and-play installation. However, some vehicles may require a simple security relearn procedure, which can be done without special tools and typically involves a sequence of key turns. Instructions can be easily found online or in your vehicle’s service manual.
What happens if I don’t provide a VIN?
We cannot ship the module without a VIN. The programming is a critical part of the product, and without it, the ECM will not function in your vehicle. Please provide your VIN during or immediately after checkout to avoid delays in processing your order.
How can I be sure this is the correct part for my car?
The best way is to match the service number from your original ECM to one of the compatible numbers listed in this description (12589998, 12599714, etc.). Also, confirm your vehicle is a 2006 HHR, 2005-06 Cobalt, or 2005-06 Pursuit with the 2.2L engine.