U0405

Invalid Data Received From Cruise Control Module

Q: 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.

Q: 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.

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.

Real-world scan data

Seen in

159

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of U0405 scans

P0405in 38.4% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear U0405 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX