OBD Guide
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P05DE

Brake Pedal Position Sensor B Circuit High

P05DE is an OBD-II diagnostic trouble code meaning: Brake Pedal Position Sensor B Circuit High. Common causes: short circuit of the signal wire of sensor b to the reference voltage or on-board network, internal sensor malfunction with voltage exceeding the upper limit. Estimated repair cost: $33–133.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–133 (est.)

Symptoms

  • Check Engine Light and Security Warnings Illuminated
  • Feeling like the brakes are dragging or the engine is losing traction
  • Incorrect operation or disabling of adaptive cruise control
  • Possible gear shift lock (automatic transmission does not exit P)
  • Brake warning on the instrument panel

Causes

  • Short circuit of the signal wire of sensor B to the reference voltage or on-board network
  • Internal sensor malfunction with voltage exceeding the upper limit
  • Damage to the insulation of the harness with contact between the signal wire and the power wire
  • Incorrect installation of a different type of sensor (incompatible characteristics)
  • ECU malfunction (rare)

How to Fix

  1. Read fault codes and check sensor B data in real time
  2. Measure the voltage on the signal wire of sensor B with the pedal released - it should be close to the lower limit of the range
  3. Disconnect the sensor connector: if the voltage drops to zero, the problem is inside the sensor; if it remains high, there is a short in the harness
  4. Test the signal wire for a short with the reference voltage supply wire
  5. Replace the brake pedal position sensor B if it is confirmed to be faulty
  6. Restore the insulation of the harness or replace the damaged section of the wiring

Related codes

P05DBP05DCP05DDP05DFP05E0P0571P0572

Error P05DE by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05DE code mean?

P05DE is an OBD-II diagnostic trouble code that indicates: Brake Pedal Position Sensor B Circuit High

What causes a P05DE error code?

The most common causes of P05DE include: Short circuit of the signal wire of sensor B to the reference voltage or on-board network; Internal sensor malfunction with voltage exceeding the upper limit; Damage to the insulation of the harness with contact between the signal wire and the power wire; Incorrect installation of a different type of sensor (incompatible characteristics).

How do I fix a P05DE diagnostic trouble code?

To fix P05DE: Read fault codes and check sensor B data in real time. Measure the voltage on the signal wire of sensor B with the pedal released - it should be close to the lower limit of the range. Disconnect the sensor connector: if the voltage drops to zero, the problem is inside the sensor; if it remains high, there is a short in the harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05DE?

Do not drive — repair immediately

How much does it cost to fix P05DE?

The estimated repair cost for P05DE is $33–133. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat