Engine-Codes - Generic - U12B1

U12B1 - Power Supply Voltage High

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

U12B1 Possible Causes

  • Faulty Audio and Video (AV) Control Unit
  • AV Control Unit harness is open or shorted
  • AV Control Unit circuit poor electrical connection

How is the U12B1 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 U12B1 code

Labor: 1.0

The cost to diagnose the U12B1 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.
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Possible Symptoms

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

U12B1 Meaning

The Diagnostic Trouble Code (DTC) sets when the Audio and Video (AV) Control Unit supply voltage exceeds upper limits.

More Information

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Information for specific makes

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