Engine-Codes - Gmc - B1446 GMC

B1446 GMC - Replace Backup Power Source

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

B1446 GMC Possible Causes

  • Faulty Communication Interface Module (CIM)
  • Communication Interface Module (CIM) harness is open or shorted
  • Communication Interface Module (CIM) circuit poor electrical connection

How is the B1446 GMC 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 B1446 GMC code

Labor: 1.0

The cost to diagnose the B1446 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.

Possible Symptoms

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

B1446 GMC Meaning

The Back-up Battery (BUB) provides voltage to the Communication Interface Module (CIM), to be able to successfully place a call in the event of a main battery disconnect during a collision event. The OBDII codes set when the CIM detects that the back-up battery voltage has dropped below the minimum threshold value.

More Information

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