AutoCodes - Generic - U0409

U0409 Code - Invalid Data Received From Alternative Fuel Control Module

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

|U0409 code possible causes

  • Faulty Alternative Fuel Control Module
  • Alternative Fuel Control Module harness is open or shorted
  • Alternative Fuel Control Module circuit poor electrical connection

|How do I fix the U0409 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 U0409 code

Labor: 1.0

The cost of diagnosing the U0409 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 U0409 code possible symptoms?

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

|U0409 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 Alternative Fuel Control Module causing its integrity to be questioned.
OBDII Code U0409 - Invalid Data Received From Alternative Fuel Control Module -

|Need more information with the U0409 code?

Need more information on how to fix the U0409 code? Get Access to Factory Service Manuals

|Need help with a U0409 code?

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|U0409 code comments

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