OBD-II code · Powertrain (generic)
P05DF Brake Pedal Position Sensor B Circuit Intermittent or Erratic
Same as P057E on sensor B. 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 P05DF?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntermittent contact at connector
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.4 h
- Emissions test
- Usually unaffected
- Parts involved
- Brake Pedal Position Sensor B, Brake Pedal Wiring
Related codes
- P057EBrake Pedal Position Sensor A Circuit Intermittent or Erratic
- P05DCBrake Pedal Position Sensor B Circuit Range or Performance
- P05DDBrake Pedal Position Sensor B Circuit Low
- P05DEBrake Pedal Position Sensor B Circuit High
- P05E0Brake Pedal Position Sensor A and B Correlation
- P05E1A/C Refrigerant Pressure Sensor A Circuit Intermittent or Erratic
- P05E2A/C Refrigerant Pressure Sensor B Circuit Intermittent or Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.