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1999 s10 missing codesp0101 p0103

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timszr2
Novice

Oct 17, 2006, 4:26 PM

Post #1 of 4 (3454 views)
1999 s10 missing codesp0101 p0103 Sign In
replaced fuel filter,plugs,wires,crank sensor,coolant temp sensor,coil still missing now codes come up po1o1 and po1o3 101 is mass air flow sensor will replacing it make it stop missing
99 zr2


Guest
Anonymous Poster

Oct 18, 2006, 2:41 AM

Post #2 of 4 (3449 views)
Re: 1999 s10 missing codesp0101 p0103 Sign In


DanD
Veteran / Moderator
DanD profile image

Oct 18, 2006, 3:49 AM

Post #3 of 4 (3447 views)
Re: 1999 s10 missing codesp0101 p0103 Sign In
 Yes a MAF can cause the engine to run poorly but just because the computer has set MAF codes doesn’t mean that it is the MAF sensor for certain.
For example the computer uses the TPS (throttle position sensor) as a way of checking the MAF. The computer knows that a certain TPS value the MAF sensor should be at a certain frequency. Now if the TPS is out of range but not so far out to set its own code the computer may trigger the codes that you are receiving?
The test procedure for these codes are fairly lengthy and require the use of a scan tool to read data or the computers interpretation of data coming from the MAF and TPS. Without the scanner you will not be able to confirm some of the steps of the procedure.
The things you could be checking for are is there any blockage at the MAF inlet and that the bellows between the MAF and the throttle is intact and not allowing false air to enter the engine.
If they are ok and you want to throw the dice and put a sensor on the truck you’ve got a 50/50 chance of it being the problem.
Dan.

Canadian "EH"






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Anonymous Poster

Oct 22, 2006, 8:48 AM

Post #4 of 4 (3440 views)
Re: 1999 s10 missing codesp0101 p0103 Sign In





 
 
 






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