Engine Control Module (ECM) can fail on Buick LeSabre

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

RepairPal Verified
Average mileage: 140,789 (55,000–235,000)
9 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1997, 1998, 2000
27 people reported this problem
9 people shared problem details
1994 Buick LeSabre118,000
replaced fuel pump, regulator, ignition modules, TPS, MAP,Plugs and wires,temp sensor, IAC. Car has a miss 90% of he time. acceleration power is in busts, but the engine smooths out, Some times the chime freaks out for no aperant reason while driving. Some times when accelerating from a stop right around 50 mph it acts like you let let off the throttle, it dont die but wont go. you let off the throttle and back on, its fine. changing ECM next.
2000 Buick LeSabre121,293
Had to be towed again to have this module replaced for the THIRD time on Sept. 10 Car just quits in the middle of the street or wherever. Very dangerous! Module is waranteed for a year...only last 5 months or less.
car just turns over but dont seem to be firing
1993 Buick LeSabre196,000
The problem isn't repaired. I found out from a repair bill in 1/10/12 that I possible problems with Engine Module Control (EMC). But I never had it repaired. But now I am having problems with engine going off and back on while driving it. I have to warm up my engine before my transmission will run normally. It only takes a minute. That could be the problem with my engine.
1997 Buick LeSabre180,000
Car won't turn over. Replaced the battery & everything lites up. But nothing from the engine.
1995 Buick LeSabre59,500
Bad engine performance . Obd test . Car not fixed yet .
1997 Buick LeSabre235,000
Fuel mileage was down, transmission was acting weird and I didn't know what was going on until the belt tensioner went bad and required the battery being disconnected for awhile. Everything improved after the computer was reset, but within 2 weeks, it needs reset again to get things back in order, so I'm assuming the ECM needs replaced.
1995 Buick LeSabre107,000
A sudden crank but no start issue led me into a misdiagnosis nightmare! I replaced just about everything associated with this problem. Nothing changed. Many dollars later, I found pcm at a junkyard for $20. Solved the problem.
1994 Buick LeSabre138,000
car studders between 30 and 50 miles an hour
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