C0800 07
C0800 07Supply voltage Too High
Fault symptom
ABS warning lamp on
TCS/ESP warning lamp comes on.
Messages shown in SID.
Steering column lock not working.
On-board diagnosis
Type of diagnosis:
Continuous
Enable criteria:
Ignition ON.
Fault criteria:
Battery voltage exceeds 18.5 V for 0.5 s.
System reaction to a fault:
No ABS function
No TCS/ESP function
Checking the wiring harness
Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.
Diagnostic help
The DTC can be generated if a 24V battery charger is used to charge the battery or if another vehicle with 24V battery, e.g. a truck, has been used to help start the car.