P05E7Park Brake Sensor/Switch Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- The engine module reads the park brake status, directly or via another module, because strategies depend on it: a parked diesel filter regeneration only runs with the park brake applied (Navistar), idle shutdown and PTO logic use it, and Ford delays an automatic restart while the electric park brake moves. CARB requires such inputs to be monitored. The only documented user of this code family is Volvo Trucks: since OBD 2021 a second park brake sensor (about 0.5 V applied, 3.5 V released) must agree with the old switch; the engine module reports the fault. No passenger car maker uses it verifiably. P05E7 means the signal jumps briefly without being permanently low or high – changes without operation, while driving or too quickly in a row. The status is then discarded and regeneration or stop-start is blocked.
- What you may notice
- Intermittent check engine or park brake warning
- Running parked regeneration aborts
- Stop-start occasionally blocked
- Likely causes
- LikelyLoose contact or corrosion at connector or splice
- PossibleChafed wire with intermittent short
- PossibleSwitch bouncing or worn
- RareModule connector
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.