Engine Control Module (ECM) can fail on Buick Riviera

Problem Description and Possible Solution

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

Problem Data
RepairPal Verified
Average mileage: 147,666 (126,000–188,000)
3 model years affected: 1990, 1991, 1995
11 people reported this problem
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Engine shuts down when water temp gauge goes a hair over 170 degrees. The gauge ranges from 100-280 degrees. But a red light comes on at about 171 and engine quits. Yet when I feel hood of car it is cool. I get a little steam out of radiator but not much immediately after shut down. I can open it bare handed. I do not have a "fix" as of yet.