Restore Peak Performance to Your Vehicle
Is your Chevrolet Cobalt or other GM vehicle suffering from perplexing engine issues like stalling, misfires, or an illuminated Check Engine Light? The Engine Control Module (ECM) is the central computer of your vehicle’s powertrain, responsible for managing everything from fuel injection and ignition timing to emissions controls and transmission shifting. When it fails, it can cause a cascade of problems that are frustrating and difficult to diagnose. This replacement Engine Control Module, part number 12603530, is the definitive solution to restore your vehicle’s reliability and performance.
From the Diagnostic Bay
We had a 2006 Cobalt come into the shop with a classic case of intermittent stalling. The owner had already replaced the crank sensor and checked for vacuum leaks, but the car would still die randomly at stoplights. After hooking up our professional scan tool, we noticed intermittent data loss from the ECM. A visual inspection of the wiring harness showed no damage. We swapped in a VIN-programmed ECM, and the problem was solved instantly. These modules can develop internal faults that don’t always set a specific trouble code, making them a common culprit for those hard-to-diagnose drivability issues.
Is Your Vehicle Exhibiting These Symptoms?
A failing engine computer can manifest in many ways. If you’re experiencing any of the following, a faulty ECM could be the root cause. This replacement 2006 Cobalt Engine Control Module is designed to correct these common issues.
- ✔ Persistent Check Engine Light (CEL)
- ✔ Engine stalling or shutting off while driving
- ✔ Rough idling, hesitation, or misfires
- ✔ A noticeable decrease in fuel economy
- ✔ Complete no-start condition where the engine cranks but won’t fire
- ✔ Inconsistent or harsh automatic transmission shifting
- ✔ Communication errors with diagnostic scan tools
Plug-and-Play Solution with VIN Programming
Don’t waste time and money with a used module from a salvage yard that requires an expensive trip to the dealership for programming. We take the guesswork out of the repair. When you purchase this ECM, we will flash it with the latest, most up-to-date OEM software from General Motors, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This ensures that all factory parameters, security information (anti-theft), and component calibrations are correct for your exact build. The result is a simple, plug-and-play installation that gets you back on the road quickly.
This module is a direct replacement for a wide range of GM vehicles and is interchangeable with the following service numbers: 12590032, 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737. Please verify your part number and consult the extensive fitment list to ensure compatibility.
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN allows us to program the Engine Control Module with the precise software and calibrations for your vehicle’s specific engine, transmission, and options. This is critical for proper engine function, emissions compliance, and to ensure the anti-theft system works correctly. Without VIN programming, the module will not work in your car.
Is any additional programming required after I install it?
No. This module arrives ready for installation. Because we program it to your VIN beforehand, you can simply disconnect the battery, swap the modules, reconnect the battery, and start your vehicle. In some cases, a security or crank relearn procedure may be necessary, which can be done with a capable scan tool or by following a specific vehicle procedure.
How can I be sure my old ECM is the problem?
While the symptoms listed are common indicators of ECM failure, it’s essential to have a proper diagnosis performed. A qualified mechanic should rule out other potential causes like faulty sensors, wiring issues, or fuel delivery problems before condemning the ECM. A common diagnostic step is to check for communication with the ECM using a scan tool and verify power and ground signals at the module’s connector.
Will this part fix my check engine light?
If the check engine light is caused by an internal fault within the old ECM, then this replacement part will resolve the issue. However, if the light is on due to a problem with another component (like an oxygen sensor or ignition coil), you will still need to repair that underlying issue. This module will allow your vehicle’s computer system to function correctly and accurately report any other system faults.
Is this compatible with vehicles other than the 2006 Cobalt?
Yes. This ECM, part number 12603530, and its equivalents were used across a vast number of GM vehicles, including models from Buick, Cadillac, Pontiac, Saturn, Hummer, and Isuzu. Please review the detailed compatibility list on this page to confirm it fits your specific year, make, and model.