OBD-II code · Network
U01BA Lost Communication With Park Lock/Pawl Control Module
ECU lost communication with park lock/pawl control module (electronic parking pawl, common on automatic and EV gearboxes).
Is it safe to drive with U01BA?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyModule unpowered
- 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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Park Lock Module, Can Bus
Related codes
- U01B7Lost Communication With Switch Input Module A
- U01B8Lost Communication With Switch Input Module B
- U01B9Lost Communication With Switch Input Module C
- U01BBLost Communication With Battery Charger Control Module B
- U01BCLost Communication With Charge Air Cooler Coolant Pump B
- U01BDLost Communication With DC/DC Converter Control Module C
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.