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B2478 Buick Code - Reverse Light Relay Shorted To Battery

- Code Popularity: 393 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B2478 Buick?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Reverse Light Relay
  • Reverse Light Relay harness is open or shorted
  • Reverse Light Relay circuit poor electrical connection
  • Faulty Platform Zone Module (PZM)
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How to Fix the DTC B2478 Buick?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2478 Buick code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code B2478 Buick Description

When Platform Zone Module (PZM) receives input that transaxle is in Reverse, PZM energizes reverse light relay which will turn on back-up lights. When back-up lights have been commanded on, PZM constantly measures voltage. The Diagnostic Trouble Code (DTC) B2478 will set when voltage is not at ground potential for at least 2 seconds. DTC B2478 will clear when voltage is greater than the ground for at least one monitoring cycle.

OBDII Code B2478 Buick - Reverse Light Relay Shorted To Battery - AutoCodes.com
B2478 Buick Code - Reverse Light Relay Shorted To Battery

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Code B2478 Buick comments

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