CEL codes P1128 & P1130

[Steelepuls]

Originally Posted by blue62

"If" your MAF sensor is the problem cleaning it doesn't always correct the problem.
Perhaps it needs replaced????

As to your question about low humidity.
the MAF sensor accounts for changes in humidity when it is functioning properly.

Blue,
The MAF is only 2 years old, along with new O2 sensors. What I tried today was cleanning the throttle body and recalibrating it. It seemed to fix the CEL coming on after about 20 miles of driving. I now only have the SAI monitor after driving about 40 miles. Hopefully I can continue driving it so I can reset the last monitor with no CEL. Then I can get the smog finally and hopefully it passes.

[Jager]

With those two trouble codes, P1128 and P1130, the AOS is also suspect.

[blue62]

Originally Posted by Jager

With those two trouble codes, P1128 and P1130, the AOS is also suspect.

There is a spec for vacuum at the oil filler cap. It Has to be read with a manometer as a regular vacuum gauge is not calibrated fine enough. I do not know the spec but if it exceeds the spec then the AOS is suspect. This info has been posted by member "JFP in PA" so if one does a search you should be able to find the info.

[blue62]

I just went and did a search under manometer.
The spec calls for under 5in/wc at operating temp.
You need a manometer and an oil cap with a fitting for the vacuum hose.

[Fred111]

Originally Posted by Steelepuls

Blue,
The MAF is only 2 years old, along with new O2 sensors. What I tried today was cleanning the throttle body and recalibrating it. It seemed to fix the CEL coming on after about 20 miles of driving. I now only have the SAI monitor after driving about 40 miles. Hopefully I can continue driving it so I can reset the last monitor with no CEL. Then I can get the smog finally and hopefully it passes.

I have had these codes for a while. I cleaned the MAF and helped briefly. I finally bought a used one on ebay a few days ago and so far the codes are gone.