I am submitting an issue I am facing with Chevrolet Lumina. I am living in Dubai, so this model could be similar to Malibu in USA.
The car is good with a V6 Engine. However I started getting a problem around 3 months ago.
Upon accelerating. I am getting the check engine light. If I DON'T accelerate and try to build up speed very slowly - the check engine light will not show up. But in reality it's impossible not to accelerate. This light will remain until I turn off the car. I am able to normally drive the car but I feel it’s weaker. I’ve also noticed that at around 40 to 50 miles per hour (80 to 90 kms/ hour) the car is rough-i.E when switching from gear 2 to 3 I believe?
I've tested the car many times and these are the codes that I get- but I feel something else is causing them
P0327- Knock sensor
P0332- Knock sensor
FYI- not all computer testing companies were able to access the car computer or reset it. Some were successful but not all. They told me this car is like this- it's computer doesn't always allow access.
The latter two codes are more common that the earlier; and I even got the Crankshaft sensor issue sometimes.
My Action- Despite changing the 2 knock sensors twice (first with used ones, followed by new ones) and resetting the car computer the issue is still there.
The mechanic suspected a wiring issue causing the knock sensor circuit, but then he and other mechanics concluded that the wiring is fine.
I've also borrowed a slightly used MAF sensor from my dealer to see if the code does change but the code and the issue was there.
This car doesn't have any Oxygen sensor- and I don't know why. May be the model doesn't have.
One of the mechanics told me try and change the TPS speed sensor, I believe, but I am not ready for further trial and error tests.
Any ideas of what to do?
have the same problem?
Monday, March 16th, 2015 AT 3:55 AM