OBD-II code · Network
U0318 Software Incompatibility with Power Steering Control Module
A control module has detected that its software version does not match the electric power steering module. Steering may stay functional but become heavy if the EPS goes into a fallback mode.
Is it safe to drive with U0318?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyEPS software/calibration mismatch
- PossibleUsed EPS module fitted from different vehicle
- Less likelyGateway module routing CAN messages incorrectly
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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Power Steering Module, Control Module
Related codes
- U0320Software Incompatibility With Power Steering Control Module
- U0315Software Incompatibility with ABS Control Module
- U0316Software Incompatibility with Park Brake Control Module
- U0317Software Incompatibility with Brake System Control Module
- U0319Software Incompatibility with Anti-Lock Brake System Control Module
- U031ASoftware Incompatibility With Transmission Range Control Module
- U031BSoftware Incompatibility With DC/DC Converter Control Module A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.