U0243 code meaning
Lost Communication With Parking Assist Control Module B
What U0243 means
Parking assist module B is a second parking controller beside the main one, which J2012 covers with U0159. Stellantis uses the code by name: on 2021–2023 Jeep Grand Cherokee and 2022–2023 Wagoneer and Grand Wagoneer the cluster and the module listed as ETM store U0243-00 for lost contact with the central vision park assist module (CVPAM), which handles the surround view cameras, while body, steering and blind spot modules log U0159 (case S2208000172). Customers see a blue screen in the camera views. The first step is to pull fuse F48 (10 A) for five seconds so the module restarts; software arrived through recall 56A. Stellantis adds that the scan tool shows the CVPAM as PAM. Without module B, camera views and parking aids drop out; driving is unaffected. Data errors from B are U0544.
U0243 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.2 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0243
- Blue or blank screen in surround, front or rear camera view
- Parking aid unavailable message
- U0159 stored in several other modules at the same time
Common causes of U0243
- Most likelyCamera/park module hung by software, recovers after a power reset or update
- PossibleModule B without power or ground (fuse, connector)
- PossibleBus wiring or connector to the module damaged or corroded
- Less likelyModule B internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Parking assist module bCAN bus
What each part of U0243 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 43 | The exact fault in that area. |
What to do next
- Note U0243 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 U0243
What does U0243 mean?
U0243 means "Lost Communication With Parking Assist Control Module B". Parking assist module B is a second parking controller beside the main one, which J2012 covers with U0159. It is a generic code, so it means the same on every make.
Is it safe to drive with U0243?
U0243 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0243 fail an emissions test?
U0243 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 U0243 to fix?
Difficulty: medium. A typical repair takes 0.2 to 3 hours of work. This is a job for a workshop.
Will U0243 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.