Code PO 102 MAF low voltage
Thread Starter
Melting Slicks
Joined: Oct 2009
Posts: 2,004
Likes: 392
From: Long Island New York
Code PO 102 MAF low voltage
Just got a trouble code PO 102
- i cleaned the Maf with Maf cleaner.
- no vacuum leaks
- connector at the Maf has a good ground and getting 14.5v at idle.
I’m thinking of replacing the MAF sensor at this point unless anyone has any ideas??
- i cleaned the Maf with Maf cleaner.
- no vacuum leaks
- connector at the Maf has a good ground and getting 14.5v at idle.
I’m thinking of replacing the MAF sensor at this point unless anyone has any ideas??
Drifting
Joined: May 2007
Posts: 1,547
Likes: 210
From: Huntersville, NC
P0102
Well just replacing the MAF is what is called "firing the parts cannon" . Unfortunately, the diagnosis and fix may end up being a bit more complicated. Attached are the pages from the FSM about the p0102 DTC:
There is mention of a "circuit fuse" on page 2. under Circuit/System Testing. If you have a good DVOM than you might try following the circuit testing sequence. I would need to browse through the wiring diagrams to find the fuse number. Maybe it would be faster for you to look for a fuse blown.
EDIT: Looks like Fuse 36, underhood is a possiblility. one of the things it protects is the B75C Multifunction Intake Air sensor. Unfortunately, this fuse also protects the VSS and the Bank 2 HO2S, so if thst fuse was bad you would probably have more Codes. Sorry.
There is mention of a "circuit fuse" on page 2. under Circuit/System Testing. If you have a good DVOM than you might try following the circuit testing sequence. I would need to browse through the wiring diagrams to find the fuse number. Maybe it would be faster for you to look for a fuse blown.
EDIT: Looks like Fuse 36, underhood is a possiblility. one of the things it protects is the B75C Multifunction Intake Air sensor. Unfortunately, this fuse also protects the VSS and the Bank 2 HO2S, so if thst fuse was bad you would probably have more Codes. Sorry.
Last edited by k24556; Dec 15, 2019 at 05:42 PM.
Thread Starter
Melting Slicks
Joined: Oct 2009
Posts: 2,004
Likes: 392
From: Long Island New York
As I said in the first post the Maf is getting 14.5v. I have cleared the code and it returns, after trouble shooting it’s looking to be the Maf sensor. I just ordered one for $50, I’ll find out soon. Thanks for the replies
Last edited by BlueDevilZ51; Dec 15, 2019 at 08:54 PM.
Drifting
Joined: May 2007
Posts: 1,547
Likes: 210
From: Huntersville, NC
There is no way to pull up the codes unless you have a scan tool. For the emissions-related Codes, you can buy a cheap OBD 2 tool for them, For drivetrain, brake body module codes you will need a scan tool with what is called "enhanced power train" even then some of the scan tools won't support all modules and sensors in a C7. I have AutoEnginuity with enhanced GM. It will pull up (from what I have been able to determine) nearly all modules. Bottom line, you will probably need to spend more than $500 to get it all.
Even if you can read the Codes, you will still need the C7 Factory Service Manual to troubleshoot the codes. Just because there is a code for a component does not mean replace that component. The FSM adds another $300 to the investment.
What the C7 does instead, is to treat you to a phrase on the Driver Information Center that often says "Since I don't like the way this car is being driven, I'm going to take away your ability to drive me like that. Please take me to your nearest [Friendly] dealer. They will gladly take your credit card, MAX it out and then replace components unnecessarily. Then you can again abuse me for a while".
Even if you can read the Codes, you will still need the C7 Factory Service Manual to troubleshoot the codes. Just because there is a code for a component does not mean replace that component. The FSM adds another $300 to the investment.
What the C7 does instead, is to treat you to a phrase on the Driver Information Center that often says "Since I don't like the way this car is being driven, I'm going to take away your ability to drive me like that. Please take me to your nearest [Friendly] dealer. They will gladly take your credit card, MAX it out and then replace components unnecessarily. Then you can again abuse me for a while".
Sr.Random input generator
Joined: Jan 2008
Posts: 7,804
Likes: 2,232
From: Sammamish, WA
I've also had this very issue. I think it was caused by the connector right next to it, which was drenched in oil, possibly causing a short circuit. Once I cleaned that connector, it still didn't work, and I started looking for a FUSE. F77 OFF ENG COMP was blown, and when replaced, the problem disappeared!!
In short, make sure you check out that fuse, too.
In short, make sure you check out that fuse, too.
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Sr.Random input generator
Joined: Jan 2008
Posts: 7,804
Likes: 2,232
From: Sammamish, WA
Update:
I just picked the car from service, and it turned out to be passenger side O2 sensor! It apparently short circuited with the insulation, and blew F77 fuse, which in turn caused MAF P0102 error, and everything else. The dealer said emissions is not covered under powertrain, and charged $578 ($63 of which is the new O2 sensor). Anyway, I'm very happy to have the car back and running with no issues : )
I just picked the car from service, and it turned out to be passenger side O2 sensor! It apparently short circuited with the insulation, and blew F77 fuse, which in turn caused MAF P0102 error, and everything else. The dealer said emissions is not covered under powertrain, and charged $578 ($63 of which is the new O2 sensor). Anyway, I'm very happy to have the car back and running with no issues : )
