5.7L

P0171 GM 5.7L – Test Your MAF

how-to-test-maf

The P0171 GM OBDII DTC Trouble Code relates to the Powertrain Control Module (PCM) seeing too much air from the upstream exhaust oxygen sensor, triggering the Malfunction Indicator Lamp (MIL) This error can cause driveability issues because the PCM sees…
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