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**53burb** · 04-14-2014, 06:57 PM

Symptoms of a BAD GM MAF Sensor
The most obvious one is that the CHECK ENGINE Light (CEL) will be on on your Instrument Cluster and driving you nuts. Here are a couple of others:

1.A MAF Sensor Diagnostic Trouble Code (DTC) stored in your vehicle computer’s memory.
•P0101, P0102
2.Lean and/or Rich Diagnostic Trouble Code(s).
•P0171, P01743.Fuel Trim Diagnostic Trouble Code(s).
4.No Power when you accelerate the car or truck.
5.Black smoke coming from the tail-pipe.
6.Your car or truck or SUV may idle rough and stall.

How do I test the MAF without a multimeter? I have one, but not one that reads in hertz.

04-14-2014, 06:57 PM	#11
53burb Registered User Join Date: May 2004 Location: Queen Creek, AZ Posts: 1,004	Re: P0171 & P0174 codes Symptoms of a BAD GM MAF Sensor The most obvious one is that the CHECK ENGINE Light (CEL) will be on on your Instrument Cluster and driving you nuts. Here are a couple of others: 1.A MAF Sensor Diagnostic Trouble Code (DTC) stored in your vehicle computer’s memory. •P0101, P0102 2.Lean and/or Rich Diagnostic Trouble Code(s). •P0171, P01743.Fuel Trim Diagnostic Trouble Code(s). 4.No Power when you accelerate the car or truck. 5.Black smoke coming from the tail-pipe. 6.Your car or truck or SUV may idle rough and stall. How do I test the MAF without a multimeter? I have one, but not one that reads in hertz.