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P1112 Diagnostic Trouble Code Discussion for September 2013

IAT Sensor Circuit Intermittent Low Voltage

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Trouble Ticket Help Requests for DTC P1112
Help Request Posted
2002 GMC Savana 2500 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GTGG29R62
P1112: IAT Sensor Circuit Intermittent Low Voltage. Vehicle was brought in with complaint of bucking/making noise. Drove, noted solid CEL in park, once in gear flashing CEL and notable misfire. IAT reading was initially boucing between -38f and 262f with short periods of somewhat normal functioning. Wiggle test...
September 16, 2013