B0285 GMC - Electric Rear Defrost Circuit Low

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

B0285 GMC Possible Causes

  • Faulty Liftgate Module (LGM)
  • Liftgate Module (LGM) harness is open or shorted
  • Liftgate Module (LGM) circuit poor electrical connection

First diagnose B0285 GMC code

    Check 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 terminals.

Cost of diagnosing the B0285 GMC code

    Labor: 1.0

    The cost of diagnosing the B0285 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

B0285 GMC Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B0285 GMC Meaning

The Liftgate Module (LGM) monitors the voltage level on the supply voltage circuit of the rear window defogger. The LGM test the supply voltage circuit of the rear window defogger every 160 milliseconds. With the rear window defogger inactive, the supply voltage circuit of the rear window defogger will have no voltage present. With the rear window defogger active, the supply voltage circuit of the rear window defogger will be near system voltage.
OBDII Code B0285 GMC - Electric Rear Defrost Circuit Low - Engine-Codes.com

B0285 GMC More Information

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