Question about 2000 Chevrolet Silverado 1500

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My 2000 Chevy Silverado has trouble code P1133.

I have checked for lose and broken wires, diconnected vaccum lines but have not found any problem, could the senser be bad ?

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Some cars do have recalls for bad codes being thrown check your dealership and if theres no problem they can block the code so your engine light will not come on for that code

Posted on Jun 30, 2009

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I just got the same code, the kid at advance auto told me it's the "Mass Air Flow Sensor". On our truck it's right before the air filter box and has a 4 wire plug on it. It's a collar shaped sensor right after black flex hose. Take it out and clean the 3 little sensors on the wires inside. They look like little diodes. Use isopropyl (rubbing) alcohol or MAF (contact) cleaner. If you're lucky you won't have to buy a new one, because they're like 100 bucks.

Posted on Aug 06, 2009


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if you get the information which you needed please vote me by clicking the thumbs present in the underside of the page.

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Hello girlspy0: My name is Roger and I will help you. Code 34 is related to the MAP sensor. This is usually a repair that requires electronic knowledge. If you think the map sensor is the problem the part is pricey.I would not replace the part for sake of replacing it. Check connection to make sure no wires are broken or pushed out of the terminal socket.The problem could also lie in the ECM or PCM. Should You need further help please just ask. Please rate the answer you received. This way I know if it helped. Thank You for using Fix Ya. Roger

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