OBD-II code · Chassis
C0636 Brake Pressure Sensor G Circuit High
Brake pressure sensor G signal voltage above expected range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with C0636?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to battery
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Brake Pressure Sensor G
Related codes
- C053FBrake Pressure Sensor A Circuit High
- C0543Brake Pressure Sensor B Circuit High
- C0572Brake Pressure Sensor C Circuit High
- C0576Brake Pressure Sensor D Circuit High
- C05A0Brake Pressure Sensor E Circuit High
- C05C7Brake Pressure Sensor F Circuit High
- C063ABrake Pressure Sensor H Circuit High
- C063EBrake Pressure Sensor J Circuit High
- C0642Brake Pressure Sensor K Circuit High
- C0646Brake Pressure Sensor L Circuit High
- C064ABrake Pressure Sensor M Circuit High
- C064EBrake Pressure Sensor N Circuit High
- C0633Front Half Shaft Speed Sensor
- C0634Brake Pressure Sensor A/B Correlation
- C0635Brake Pressure Sensor G Circuit/Open
- C0637Brake Pressure Sensor G Circuit Low
- C0638Brake Pressure Sensor G Range/Performance
- C0639Brake Pressure Sensor H Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.