Buick Century Problems

Engine Control Module (ECM) Can Fail on Buick Century

Problem Description and Possible Solution

The Engine Control Module (ECM) can fail causing stalling, and engine and transmission drivability concerns.

(16 people reported this problem)

Buick Century Vehicles With This Problem

RepairPal Verified
Average mileage: 121,719 (60,000–220,000)
8 model years affected: 1990, 1991, 1992, 1993, more1994, 1999, 2001, 2003
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Viewing 1-4 of 4 comments
ecu module code comes up, engine rough starting, bad idle, bad shifting, runs poorly, overheats.
Engine light has been on for a few months. Replaced O2 pressure sensor to no avail. Took to shop, diagnosed as either bad wiring harness or bad ecm. Likely ecm due to the intermittent electric output. Haven't fixed. Too expensive for the retail price of the car. Any one want to buy it?