Invalid Data Received From Cruise Control Module
The U0405 code means the vehicle's onboard diagnostic system has detected: Invalid Data Received From Cruise Control Module. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $400 (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
- Cruise control surging or hunting speed
- Cruise control disengages unexpectedly
- Speed not holding at set point
- Adaptive cruise following distance erratic
- Cruise control warning light on
Probable Causes (Ranked by Likelihood)
- Cruise control module receiving corrupted speed data Very High
- Vehicle speed sensor signal intermittent High
- Brake switch sending erratic signals Moderate
- Throttle position sensor data inconsistency Moderate
Step-by-Step Diagnostic Procedure
-
Monitor vehicle speed sensor data for dropouts or spikes
-
Check brake light switch adjustment and operation
-
Verify throttle position sensor readings are smooth
-
Inspect wiring to the cruise control module
-
Check for related speed sensor or throttle codes
Frequently Asked Questions
Can I drive with code U0405?
Yes, but avoid using cruise control until repaired. Drive manually to maintain safe speed control.
What causes U0405?
Most often caused by a failing vehicle speed sensor or an incorrectly adjusted brake light switch that sends intermittent signals to the cruise module.
Is U0405 expensive to fix?
Usually $100 to $400. Brake switch adjustment or replacement is inexpensive. Speed sensor replacement costs more depending on location.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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