U031E code meaning
Software Incompatibility With Parking Assist Control Module B
What U031E means
Parking assist control module B is a second park aid unit, found where front and rear sensors are split between controllers or an automatic parking controller sits beside the distance warning; which unit gets the letter B is decided by each maker. U031E is set when a partner module rejects the software or setup of module B, mostly after a replacement or an incomplete update. No manufacturer documents U031E publicly. FCA illustrates how such units react to bad calibration data: on 2015–2016 Jeep Renegade with ParkSense or parallel and perpendicular park assist, the park assist module stored B1000-46, the cluster announced that ParkSense was not available, and only a reflash at stable voltage helped (08-078-16). U0243 is lost contact, U0544 invalid data, U031D covers module A. Distance warnings or self-parking stay off.
U031E at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U031E
- Park assist unavailable message in the cluster
- No warning tones from front or rear sensors
- Automatic parking function cannot be started
Common causes of U031E
- Most likelySecond parking module replaced or taken from another car without programming
- PossibleModule variant does not match the fitted sensor set or parking option
- Less likelySoftware update of the parking module interrupted or incomplete
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Parking assist module bControl module software
What each part of U031E means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 1E | The exact fault in that area. |
What to do next
- Note U031E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U031E
What does U031E mean?
U031E means "Software Incompatibility With Parking Assist Control Module B". Parking assist control module B is a second park aid unit, found where front and rear sensors are split between controllers or an automatic parking controller sits beside the distance warning; which unit gets the letter B is decided by each maker. It is a generic code, so it means the same on every make.
Is it safe to drive with U031E?
U031E does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U031E fail an emissions test?
U031E is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U031E to fix?
Difficulty: workshop only. A typical repair takes 0.3 to 1.5 hours of work. This is a job for a workshop.
Will U031E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.