AutoCodes - Generic - U040A

U040A Code - Invalid Data Received From Air Conditioning Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|U040A code possible causes

  • Faulty Air Conditioning Control Module
  • Air Conditioning Control Module harness is open or shorted
  • Air Conditioning Control Module circuit poor electrical connection

|How do I fix the U040A code?

Check 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.

|Cost of diagnosing the U040A code

Labor: 1.0

The cost of diagnosing the U040A 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.

|What are U040A code possible symptoms?

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

|U040A code description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. Some devices are constantly receiving information from other devices through serial data communication network. The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Air Conditioning Control Module causing its integrity to be questioned.
OBDII Code U040a - Invalid Data Received From Air Conditioning Control Module -

|Need more information with the U040A code?

Need more information on how to fix the U040A code? Get Access to Factory Service Manuals

|Need help with a U040A code?

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|U040A code comments

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Repair Importance Level: 3
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