Invalid Data Received From Adaptive Cruise Control Module
The U0418 code means the vehicle's onboard diagnostic system has detected: Invalid Data Received From Adaptive Cruise Control Module. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- hard
- Estimated cost
- $400 - $2,000 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- ACC maintaining wrong following distance
- Phantom braking while using ACC
- ACC speed fluctuating
- Forward collision warning false alarms
- ACC disabling unexpectedly
Probable Causes (Ranked by Likelihood)
- Radar sensor sending corrupted data Very High
- Radar sensor dirty or misaligned High
- CAN bus interference at radar module Moderate
- ACC software glitch Low
Step-by-Step Diagnostic Procedure
-
Clean radar sensor on front bumper
-
Scan ACC module for codes
-
Check radar sensor alignment
-
Test CAN bus signal quality
Frequently Asked Questions
Can I drive with U0418?
Yes, but disable adaptive cruise control and use standard cruise or manual control.
What causes U0418?
Often a dirty radar sensor. Clean the sensor area on the front bumper first.
What is phantom braking?
When the ACC system applies brakes when no obstacle exists, usually from sensor interference.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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