Is Your Buick Century Running Rough? The PCM Might Be the Culprit.
If your 2001-2002 Buick Century is suffering from a persistent check engine light, erratic shifting, poor fuel economy, or even a no-start condition, the problem may lie deep within its electronic nervous system: the Powertrain Control Module (PCM). As the central computer for your vehicle, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it fails, the symptoms can be widespread and frustrating, often mimicking other component failures and leading to costly, incorrect repairs.
This replacement Powertrain Control Module, part number 12202600, is the definitive solution to restore your vehicle’s performance and reliability. It’s not just a part in a box; it’s a fully programmed, plug-and-play solution tailored specifically to your car. We use your vehicle’s unique Vehicle Identification Number (VIN) to flash the module with the latest, most stable software updates directly from GM. This critical step ensures that the module communicates flawlessly with all other systems in your vehicle, just as it did the day it left the factory.
Diagnosing and Replacing Your 2001-2002 Century PCM
A failing PCM can be tricky to diagnose, as its symptoms often overlap with other issues. However, if you’ve checked sensors, wiring, and other related components without success, the module itself becomes the primary suspect. The 2001-2002 Century PCM is the brain of the operation, and when it malfunctions, the entire powertrain can be affected. Replacing it is a straightforward process for a competent DIYer or any professional technician. Located in the left-hand (driver’s side) engine compartment, it’s typically housed within the air filter box assembly for protection. The key to a successful repair is ensuring the replacement module is correctly programmed to your vehicle’s VIN before installation, a service we provide with every order.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Unexplained drop in fuel mileage.
- ✔ Rough or unstable engine idle.
- ✔ Harsh, erratic, or delayed automatic transmission shifting.
- ✔ Engine stalling, hesitation, or misfiring.
- ✔ Vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
Don’t let a faulty computer keep your car off the road. This module is a direct-fit replacement for original part numbers 12202600, 12209614, and 09360210 and fits a wide range of GM vehicles from the era, including the Pontiac Grand Am, Chevrolet Impala, Oldsmobile Alero, and many more. By providing us with your VIN during checkout, you ensure that you receive a module that is 100% compatible and ready for installation, eliminating the need for expensive programming at a dealership. Restore your vehicle’s drivability and peace of mind with this reliable, pre-programmed 2001-2002 Century PCM.
Frequently Asked Questions
Do I need to get this module programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN when you place your order, and the module will arrive flashed with the latest GM software specific to your car, ready for installation.
Where is the PCM located on my 2001-2002 Buick Century?
The Powertrain Control Module is located in the engine bay on the driver’s side. It is typically housed inside the air cleaner assembly for protection from the elements.
Will I need to perform any other procedures after installation?
In many cases, you may need to perform a security relearn procedure (often called Passlock or Passkey) to sync the new PCM with your vehicle’s anti-theft system. This can typically be done without special tools and instructions are widely available online. A Crankshaft Variation Relearn (CASE) may also be needed, which requires a capable scan tool.
How do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on a metal plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this compatible with other vehicles besides the Buick Century?
Yes, this module is compatible with a wide range of GM vehicles from the early 2000s, including models like the Chevrolet Impala, Monte Carlo, Pontiac Grand Prix, Grand Am, Oldsmobile Alero, and more. Please check the detailed fitment list on this page to confirm compatibility with your specific vehicle.