OBD-II code · Chassis
C05A1 Brake Pressure Sensor E Circuit/Open
Open circuit on brake pressure sensor E.
Is it safe to drive with C05A1?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWire broken
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
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 E, Sensor Wiring
Related codes
- C0544Brake Pressure Sensor B Circuit/Open
- C05C8Brake Pressure Sensor F Circuit/Open
- C0635Brake Pressure Sensor G Circuit/Open
- C0639Brake Pressure Sensor H Circuit/Open
- C063DBrake Pressure Sensor J Circuit/Open
- C0641Brake Pressure Sensor K Circuit/Open
- C0645Brake Pressure Sensor L Circuit/Open
- C0649Brake Pressure Sensor M Circuit/Open
- C064DBrake Pressure Sensor N Circuit/Open
- C059EBrake Pressure Sensor E Missing Calibration
- C059FBrake Pressure Sensor E Circuit Low
- C05A0Brake Pressure Sensor E Circuit High
- C05A2Brake Pressure Sensor E Range/Performance
- C05A3Wheel Speed Sensors Supply Circuit High
- C05A4Wheel Speed Sensors Supply Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.