Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The cost to diagnose the B1334 GMC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The right air temperature switch assembly is a sliding potentiometer with detents that correspond to fixed resistance values. The Instrument Panel Integration Module (IPM) supplies 5 volts to the right air temperature switch signal circuit and provides a low reference circuit. The IPM determines which switch position has been selected by the voltage drop across the corresponding resistance value. The OBDII code sets when the IPM detects that the right air temperature switch signal circuit is less than 0.09 volts (5 counts) or greater than 4.90 volts (250 counts).
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