My truck started throwing several codes.

P0154 Bank 2 Sensor 1

P0102 MAF or VAF A circuit low input

P1153

I took all the plastics and sensors off while cleaning the air filter several weeks ago. Re-installed it all and drove it for a day or two with no problems. I left for three weeks and right after I left my wife got a CEL. Any thoughts on why the MAF would have a problem?

1997 Tahoe

 

2 of those codes are related to the pass side front o2 for voltage and switching. Inspect wires/ground and/or replace the o2 (they don't last forever) Your Maf is probably fine. Try that first.

 

I assume you have a K&N type of filter then. Might want to carefully clean the MAF, the filter oil can cause it to read badly.

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like said above, that is proabably the reason ODBII cars have parameters and if they go out of spec for too much of a time, it kicks the code.

 

I first thought that the oil was the problem, but the code is for a low circuit input and not a faulty MAF. I do however plan on cleaning it out. My first thoughts were to replace the o2's as well first.

I may have bad cats which caused the o2's to take a ****. I am getting a foul smell from the engine bay area. While ideling the truck wants to stumble and idel rough. Once I am driving at rated rpm's the truck is fine.