U0405
Invalid Data Received From Cruise Control Module
Network / communication
Generic OBD-II
Low
What it means
U0405 means a module is receiving data from the cruise control module that is out of range or implausible. The practical effect is that cruise control — and any adaptive-cruise or related driver-assist features — may be disabled. Braking, steering, and the powertrain are unaffected, so the car is safe to drive while you sort out the module's wiring, sensors, or software.
Low
Can I keep driving? Yes — cruise control (including adaptive cruise) may be disabled, but normal driving, braking, and steering are unaffected.
Common symptoms
What you'll notice
- Cruise control won't engage or drops out
- Adaptive cruise / driver-assist features disabled
- Cruise or driver-assist warning message on
- Other modules storing 'lost communication' or 'invalid data' codes for the cruise control module
Common causes
Most likely first
- Cruise control module broadcasting out-of-range or implausible values onto the busLikely
- Internal cruise control module fault or corrupted softwareCommon
- Wiring, connector, or ground fault at the module corrupting bus dataCommon
- Input sensor (radar/speed) feeding the module impossible readingsLess often
How to diagnose & fix
Work through it in order
- Scan all modules and record every stored code, including companion communication codes.
- Check cruise control module power, grounds, and connectors.
- Inspect the module and its input wiring for damage or corrosion.
- Verify module software; reflash or replace and program if internally failed, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with U0405?+
Yes. Only cruise control and any adaptive-cruise features are affected. Braking, steering, and the powertrain work normally — you just won't have cruise until it's fixed.
Can I just clear U0405?+
It returns until the fault is repaired. The cruise control module is still reporting invalid data, so the wiring, sensor, or module issue must be addressed.
Related codes
Often seen with U0405
Read & clear U0405 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX