OBD-II code · Network (extended)
U3024 Control Module Input Power Circuit B - Ignition Input On/Start Circuit Correlation
Control Module Input Power Circuit B - Ignition Input On/Start Circuit Correlation: the value does not correlate with the related sensor or expected pattern.
Is it safe to drive with U3024?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWiring or relay fault
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Module Power B, Ignition Input
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.