Engine-Codes - Cadillac - B0284 CADILLAC

B0284 CADILLAC - Electric Rear Defrost Circuit Range/Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

B0284 CADILLAC Possible Causes

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

How is the B0284 CADILLAC code repair?

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.

What is the cost to diagnose the B0284 CADILLAC code

Labor: 1.0

The cost to diagnose the B0284 CADILLAC 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.

Possible Symptoms

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

B0284 CADILLAC 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.

More Information

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