Trans problems caused by mass air flow sensor
Thread Starter
Drifting
Joined: Aug 2015
Posts: 1,431
Likes: 9
From: Michigan
Trans problems caused by mass air flow sensor
I've been searching old threads and didn't find anything.
Do any of you know whether a problem with the mass air flow sensor can cause the transmission to prematurely wear out? Loose a gear?
Do any of you know whether a problem with the mass air flow sensor can cause the transmission to prematurely wear out? Loose a gear?
Thread Starter
Drifting
Joined: Aug 2015
Posts: 1,431
Likes: 9
From: Michigan
I had my A4 rebuilt last summer. It wasn't making the 1-2 shift. I took the car to a very reputable shop, the owner used to teach transmission repair at the local community college and have had them work on work trucks we owned for over 20 years.
A month ago the trans started acting up again, took it back and went for a ride with one of the techs and with a computer hooked to OBDII he could see it wasn't making 1-2 shift again. He suspected a solenoid or servo. I picked the car up yesterday, they had to do a rebuild again, said 2nd and 3rd were gone? They did not charge me for the rebuild but did install a new MAP sensor and said there was some info that these could cause trans problems but couldn't prove that it did in this case, just doing it as a precaution.
When I got home I searched for this kind of problem. I found the article at the link below. There are more articles concerning Chevy vehicles, just wondered if anyone else had experienced this.
http://www.samscars.com/gf87.html
A month ago the trans started acting up again, took it back and went for a ride with one of the techs and with a computer hooked to OBDII he could see it wasn't making 1-2 shift again. He suspected a solenoid or servo. I picked the car up yesterday, they had to do a rebuild again, said 2nd and 3rd were gone? They did not charge me for the rebuild but did install a new MAP sensor and said there was some info that these could cause trans problems but couldn't prove that it did in this case, just doing it as a precaution.
When I got home I searched for this kind of problem. I found the article at the link below. There are more articles concerning Chevy vehicles, just wondered if anyone else had experienced this.
http://www.samscars.com/gf87.html
Race Director
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
My answer would be yes. The PCM is calculating engine torque to control the line pressure so any issue that throws the torque calculation off on the low side could potentially damage the transmission.
Thread Starter
Drifting
Joined: Aug 2015
Posts: 1,431
Likes: 9
From: Michigan
If yes, would it show in the DTC ?
I show no codes with the PCM. A few door control issues only.
I did have an engine check light come on the day before putting it up for the winter however it didn’t show when I started it up a few weeks ago.
I show no codes with the PCM. A few door control issues only.
I did have an engine check light come on the day before putting it up for the winter however it didn’t show when I started it up a few weeks ago.
1/4 mile/AutoX
Joined: Jun 2014
Posts: 11,443
Likes: 2,189
From: Buffalo Texas
I had my A4 rebuilt last summer. It wasn't making the 1-2 shift. I took the car to a very reputable shop, the owner used to teach transmission repair at the local community college and have had them work on work trucks we owned for over 20 years.
A month ago the trans started acting up again, took it back and went for a ride with one of the techs and with a computer hooked to OBDII he could see it wasn't making 1-2 shift again. He suspected a solenoid or servo. I picked the car up yesterday, they had to do a rebuild again, said 2nd and 3rd were gone? They did not charge me for the rebuild but did install a new MAP sensor and said there was some info that these could cause trans problems but couldn't prove that it did in this case, just doing it as a precaution.
When I got home I searched for this kind of problem. I found the article at the link below. There are more articles concerning Chevy vehicles, just wondered if anyone else had experienced this.
http://www.samscars.com/gf87.html
A month ago the trans started acting up again, took it back and went for a ride with one of the techs and with a computer hooked to OBDII he could see it wasn't making 1-2 shift again. He suspected a solenoid or servo. I picked the car up yesterday, they had to do a rebuild again, said 2nd and 3rd were gone? They did not charge me for the rebuild but did install a new MAP sensor and said there was some info that these could cause trans problems but couldn't prove that it did in this case, just doing it as a precaution.
When I got home I searched for this kind of problem. I found the article at the link below. There are more articles concerning Chevy vehicles, just wondered if anyone else had experienced this.
http://www.samscars.com/gf87.html
