lean codes, traction control light, hard shifts???

12711 Views 5 Replies 6 Participants Last post by killroy134, Nov 26, 2018

chuxta1983

Discussion Starter · Dec 24, 2010

I have an '06 gtp sedan, with the 3.9 automatic. I've taken the car to the dealer because driving down the road one day the traction control light came on in the dash. I noticed that while the light was on the transmission shifts hard. It did it one time at a stop light, and when i took off it was like you neutral dropped it, with a nice clunk when it went into gear. After this happens the cel comes on. The dealer told me that the k&n air filter was the problem and I had to clean my MAF sensor. I replaced the k&n with a conventional filter, and cleaned the MAF sensor. The car is worse than ever, of course this all occurred right at the 100000 mile mark, and now the car is over and there is no sense in taking the car back to HALEY they suck as far as service. Any help at all would be appreciated

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plano_doug

· #5 · Jan 19, 2017

hubbardbk said:
I found that my car's transmission is shifting hard and the "Traction Off" light stays on. It only shifts hard when the light is on (once in a blue moon it goes off). I thought I cleaned the MAF sensor well, but apparently not. Would an O2 Sensor be the cause of the hard shifts? I had it checked and I had O2 Sensor, Catalytic Converter, and MAF Sensor codes. I'm a college student so I can't really afford to replace all of these things at once. Please help!!

Can you get the codes read? I'm thinking this is an ABS issue (so you'll need a code reader that supports ABS).

In my experience, the computer will disable traction control when there's an ABS issue. And that issue is often just a damaged wire between the wheel speed sensor (ie, the wheel hub) and the computer.

Furthermore, hard shifting is often a sign of the transmission maxing out on the shift pressure, P1811 code, I believe. Its code description includes "max adaptive shift" as I recall. As long as it continues shifting, I wouldn't worry too much about it

I'm not sure if it could also cause the Traction Off condition.

I suggest first going to a parts store and seeing if they can read some codes.

Doug

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