DTC C12B4 Cadillac
Master Cylinder Pressure Sensor Erratic
Master Cylinder Pressure Sensor Erratic
Description
The ignition is ON. Ignition voltage is greater than 10 volts. The brake pedal is not applied.
Cause and Solution
C012A 00, C128E or C128B
Internal sensor failure is detected.
C012A 11
Improper relearn performed
C012A 01 or C12B3
A short to battery is detected on the sensor signal circuit.
C012A 06 or C12B2
A short to ground or open is detected signal circuit.
C012A OF or C12B4
Video Guide
Diagnostic Info
- DTC Code: C12B4
- Brand: Cadillac