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My ac compressor will not turn on because of my service engine light. The computer says the camshaft positioning sensor is bad. As soon as I erase the data for the code. The ac compressor turn on without a problem and also my ac compressor is new with accumulator and low pressure sensor also. My question is what does the service engine light have to do with ac compressor?

Vehicle: 2001, chevrolet, suburban, 8.1L

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The CK ENG LT is designed to protect the catalytic convertor and the catalytic convertor is to protect the enviroment from harmful emission emitted into the atmosphere, So yes depending on the code condition that the ECM stores  if it is a type "A" code which is acatalytic deteriating code, the A/C system will shutdown , indoing so it protect the catalytic , also when the CK ENG LT is on it can subsitute certain sensor value to protect the catalytic convertor .

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