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I just did the 20/20 tune on it and now it actually runs like it should have since new and gets in the high teens on the highway. wiring my knock sensor on a 2003 chevy silverado 4.3 v6. P0102 - Mass or Volume Air Flow Circuit Low Input Possible causes- Faulty mass air flow sensor. 2003 chevy silverado mass air flow sensor problems code#I turned off P0101 and it finally made a truck out of it. 2003 Silverado throws a mass air flow code and code 171 and 174. Finally it made it out of warranty and we did a DPF and EGR delete via tuning and with a block off plate and the damn thing started setting the P0101 again. With the help of tech assistance at 95,000 we condemned the EGR cooler as it was restricted just enough to throw the mass air reading off at idle and set a P0101. I smoked tested the entire charge air and air cleaner side of the intake and never found a leak. I had an 09 that from 70,000 miles on had constant P0101 issues. The fact that yours is doing it under high load makes me think you have a fuel delivery problem and the mass air flow code is setting because the engine isn't doing what the ECM is telling it to do. The EGR system is also another one that really plays with air flow through the engine and loves to throw a P0101 and may not necessarily set a P0401 for a lack of EGR flow. Was it P0101? Dirty, not fully seated, or other than AC Delco filters are the most common reason for setting a P0101 but they usually do it at idle or low load. Can't have any air leakage thru the gasket area. It's pretty sensitive to how it is mounted. Also, you might want to double check the installation of the MAF. Mass Air Flow Sensor Meter Compatible with Chevy Silverado GMC Sierra MAF Sensor Replace 25318411 25168491 AF10043. Try using it in a normal (little 'ol' lady) fashion for a couple of trips to the store, fuel station, etc and see if it doesn't clear up on it's own. Delphi AF10043 Mass Air Flow Sensor in Air Mass. Order your parts online or pick them up in-store at your local Advance Auto Parts. Check prices & reviews on aftermarket & stock parts for your 2003 Silverado 1500 Air Flow Meter & Mass Air. to 40 on original replacement 2000 Chevrolet Silverado 1500 mass air flow sensors This code. Compare 2003 Chevrolet Silverado 1500 Air Flow Meter & Mass Air brands. 2003 chevy silverado mass air flow sensor problems how to#Now, in case this is not the article you're looking for, there are also 3 other GM MAF sensor test articles: How To Test The GM Mass Air Flow Sensor: GMC Savana Van and Chevy Express Van 4.3L, 5.3L, 6. It could be that you just tried to run the truck too hard, too soon. Most GM cars produced in 1996-2003 use J1850-VPW interface. (1999-2006 V8 Chevrolet Silverado, GMC Sierra). Next day, started the truck, CEL light now off, and the truck ran great. I was convinced that somehow, the cleaning damaged the MAF and I would have to buy a new one. ![]() Went to the internet searched and searched for a similar situation and couldn't find a thing. Tried starting the truck several times thinking that a few key on-off cycles would clear the CEL. It only takes a few seconds for the cleaning fluid to dry so I was concerned that I did something wrong. ![]() Click to expand.My experience with MAF cleaner is that I cleaned my MAF one afternoon, reinstalled it and a couple of minutes later started it. ![]()
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