Chassis
generic / SAE
C0420
Adaptive Cruise Control Module Internal Performance
The adaptive cruise control module has reported an internal performance fault — for example self-test failure, supply voltage out of range or invalid configuration. ACC is disabled.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number4 / 20
Possible causes
- ACC module internal fault high
- Supply voltage out of range medium
- Module configuration invalid after part exchange low
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 300–1800 €
- Estimated time: 0.5–3 h
- Component: acc module
- Component: vehicle power supply
- Component: communication bus
Sources
References
sae:J2012