NHTSA — Power Train: Automatic Transmission: Control Module (Tcm, Pcm) Problems

3.5

definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
37,500 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

1995 Pontiac Bonneville transmission problems

transmission problem

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1995 Pontiac Bonneville Owner Comments

problem #4

Jun 012004

Bonneville 6-cyl

  • Automatic transmission
  • 71,000 miles

A D V E R T I S E M E N T S

I purchased this car used from a dealer in 2001 in Michigan. (I don't think the air conditioning ever worked ). within a few months the traction control went out. It would be on, when the car started, but within driving 300ft. Would go out and could not be turned back on from the button. A few months after that all of the dash lights went out when ever you turned on the head lights. This was due to a bad switch & a short. Then the cruse control went out. A few months after that we had to replace the head gaskets due to the engine over heating by an unknown cause. 1 month after that we had to replace the engine after throwing a rod and cracking the engine block, due to the fact that there was still fluind in the engine from melted manafold.( this all took place between Nov. 2001 & Jan. 2002) after that the ignition had to be replaced because one of the wires was severed due to the wheel tilt. (we would tilt the wheel & could not start the car). In Nov. 2002 the transmission started to slip, we had it replaced. Then all at one time (2003) the battery went dead, the timing chain had jumped a tooth, the cam sensor, and the spark plugs which had been changed a few weeks before. A few weeks after that the engine overheated again due to a leak in the coolant resovoir bottel, this caused the head gaskets to blow again. It is now 2004 we have an ongoing electrical problem. Since mid 2003 we have gone through 3 PCM & 3 proms due to the fact the they kept frying ( a result of a bad ground that still can not be found), an altanator due to the fact that it had spikes. The check enging light would constantly come on & when the codes were pulled the egr vlave was listed, we replaced it and still the check engine light came on due to a still bad PCM. Now whenever we turn on the blinker the voltage gage moves in time with it due to a short. The RPM's surge at times while car is in motion or at idle, causing the car to satll or backfire. The cause is still unknown.

- 29 Palms, CA, USA

problem #3

Sep 202003

Bonneville 6-cyl

  • Automatic transmission
  • 79,000 miles
Traction control turns off when the vehicle is in motion. Randomly occurs after traveling several hundred feet. Higher incidence at time of automatic gear shift into 3rd gear. Can not be reset by traction control switch - must come to full stop and turn off engine. With rapid acceleration and maintaining speed at 55 mph or above "traction control off" light will not come on. Drop down to ~50 mph and light comes on. GM dealer claims npf but problem occurs almost each time out for me. Another dealer claims replacement of tc module necessary - service tech tells me it is common problem to 95 & 96 Bonneville.

- Baltimore, MD, USA

problem #2

Nov 151999

Bonneville

  • miles
Traction control is turning off whenever vehicle is moving. Traction control off light does not come on when vehicle is at idle and stationary. On off switch will not turn on traction control when it has come on by itself. To turn off traction control off dash light you must restart vehicle. It will stay off until vehicle moves approximately 300 to 500 feet then will come on again.

- Ithaca, MI, USA

problem #1

Sep 261999

Bonneville

  • Automatic transmission
  • miles
Traction control for ABS system failed. Mjs

- Vienna, VA, USA

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