Network, generic

U0243 Lost Communication With Parking Assist Control Module B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Camera/park module hung by software, recovers after a power reset or update
Module B without power or ground (fuse, connector)
Bus wiring or connector to the module damaged or corroded
Module B internally faulty

Symptoms

  • 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

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–1,200
Time0.2–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

parking assist module bcan bus

Related codes

U0159U0544

References: static.nhtsa.gov, static.nhtsa.gov, en.wikipedia.org.