U045AInvalid Data Received From Parking Assist Control Module A
- Generic OBD-II code · Network
- How the car detects it
- Parking assist module A evaluates the ultrasonic sensors and in newer cars requests steering or braking for automated parking. U045A flags invalid data from it; U0159 is lost contact, U0544 covers module B. GM's brake module tables for the 2019 Cadillac XT4 (19OBDG03D) and 2020 (20OBDG03C) test counter and checksum of the parking brake request, a failure count rising by 2 per error and tripping at 3, within 0.2 s, Type C without MIL; the 2025 EBCM (25OBDG04B) wants 8 bad frames in 16. Ford's 2024 OBD summary rates U045A type 48 as non-MIL on cars with fully aided park assist. FCA TSB 08-011-15 (2014 Cherokee) fixes U045A-86 with new PAM software, Mercedes LI46.35-P-071804 lets E-Class steering units ignore U045A00, and Mazda's CX-5 camera logs U045A:68 after water entered sensor plugs. Park assist drops out.
- What you may notice
- Park assist or automatic parking unavailable
- Parking sensor indicator flashing or false obstacle warnings
- Emergency braking or collision warning message
- Likely causes
- LikelyParking assist module software needing an update
- PossibleWater or corrosion in ultrasonic sensor plugs or the bumper harness
- RareReceiver storing the code as harmless history after a software change
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.