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Pontiac Bonneville Problems

Engine Control Module (ECM) can fail on Pontiac Bonneville

Problem Description and Possible Solution

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

(13 people reported this problem)

Pontiac Bonneville Vehicles With This Problem

RepairPal Verified
Average mileage: 103,761 (54,000–153,523)
7 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 2001
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Viewing 1-2 of 2 comments
ECU went bad twice with the sputtering and transmission drivability concerns.
The first time it went bad, my replacement was also bad and had to get a second replacement. This was at 54,000 miles
I am still working on the second time. My first replacement ECU was bad and now my second replacement ECU is bad. it now has 56,000 miles