Cadillac Repair/maf sensor


QUESTION: What are signs of bad maf sensor

ANSWER: Hello,

You did not state the year, make model. The Mass Air Flow sensor controls performance but if you are dealing with a pre 1994 vehicle an initial diagnoses is spotty and has to be questioned because the sensor you refer to could not even be your problem. Why do you think the MAF is bad?

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QUESTION: 2000 Cadillac Deville. Signs of maf sensor going bad


Poor running, check engine or service engine soon light coming on, however this can be a symptom for anything related to the computer system. The only way to know for you to know for sure is to have the computer scanned with a Tech II or equivalent. Many of the larger service facilities have this equipment so you don't have to go to a dealer.

To ask as to the characteristics of a bad sensor cannot give you the answer you need because something in front of that sensor can be the problem as well.

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Rob Painter


Alarm system questions cannot be answered on this forum. These systems are not what I can answer. Without being physically at the vehicle and not knowing what kind of electrical service has been done on the vehicle, there is no possible way to give an accurate answer over the internet. My expertise is in Ignition/key based anti-theft systems. These issues include GM VATS (resistor chip in key blade) PASSLOCK (MRD)-ignition lock rotation based, no special ignition key and the PKIII Transponder (computer chip in key) systems. These systems are not alarm based and are integral with the starting of the engine. This is why I cannot diagnose alarm problems without physically looking at the vehicle: Alarm systems are a completely different annimal than ignition key/lock based anti-theft system. Many alarm questions come from vehicles 10 years old, and since older, many hands that had been involved over the years.I am an expert in all GM factory (ignition/key based)systems. Alarm system questions pose to many situations beyond my knowledge as to what has been done to the vehicle over the years. Some guy may have actually wired the stereo into the alarm system. Who knows? Over my past 30 years in vehicle wiring repair, I have seen unbelievable wiring disaters done by guys that consider themselves "mechanics." I have seen stereos and alarms intalled using surgical tape. I have seen modules burn up, un-fused circuits, wiring jambed between the doors and even lamp cord used for a starter kill. To answer alarm questions over the internet without examining the vehicle is like asking; What does it take to remove a dent?


Education/Credentials-ASE certified. 11 years with a GM dealer and 17 years with a repair facility dealing with only the repair of theft recovered vehicles.

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