OBD Guide

U046C

Invalid Data Received From A/C Compressor Control Module

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Air conditioner won't turn on
  • Unstable operation of the air conditioning system
  • Check Engine light comes on
  • Increased fuel consumption
  • Loss of power when turning on the air conditioner

Causes

  • Malfunction of the air conditioning compressor control module
  • Damage to the wiring harness to the module
  • Poor contact in connectors
  • Software error in the module
  • Module power problems

How to Fix

  1. Check the connections and connectors of the control module
  2. Test the integrity of the wires to the module
  3. Check the power supply and ground of the module
  4. Scan the module for errors
  5. If necessary, replace the compressor control module

Related codes

Error U046C by Vehicle Brand