C0620
Park Assist Module Communication
The chassis control module has detected a communication fault with the park assist module. Parking sensors, surround view and automatic parking functions are unavailable until communication is restored.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: medium
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
Ordered by how often each turns out to be the cause.
- Communication bus faultCommon
- Park assist module failedPossible
- Power supply or ground fault to moduleLess likely
Parts involved
- Park Assist Module
- Communication Bus
- Chassis Control Module
C0620 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.