OBD Guide
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P05E4

Park Brake Sensor/Switch Circuit Low

P05E4 is an OBD-II diagnostic trouble code meaning: Park Brake Sensor/Switch Circuit Low. Common causes: short circuit of the signal wire of the switch to the car body, moisture entering the switch connector with the formation of a conductive path to ground. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Check Engine Light Is On
  • Parking brake indicator stays on when the brake is released
  • Disabling the Hill Start Assist function
  • In EPB systems - unstable operation of the parking brake
  • Fault warning on the information display

Causes

  • Short circuit of the signal wire of the switch to the car body
  • Moisture entering the switch connector with the formation of a conductive path to ground
  • Breakage of the power wire while maintaining a short circuit of the signal wire
  • Internal short in the parking brake switch itself
  • Damage to the harness insulation in the area of the parking brake mechanism

How to Fix

  1. Read fault codes and check related brake system codes
  2. Measure the voltage on the signal wire of the switch with the ignition on in both brake positions
  3. Disconnect the switch connector: if the voltage rises, there is a short circuit inside the switch
  4. If the voltage remains low when the connector is disconnected, test the wire for a short to ground.
  5. Inspect the harness in the area of the parking brake lever and drive mechanism
  6. Replace the switch or repair the wiring based on the test results

Related codes

P05E3P05E5P0571P0572

Error P05E4 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05E4 code mean?

P05E4 is an OBD-II diagnostic trouble code that indicates: Park Brake Sensor/Switch Circuit Low

What causes a P05E4 error code?

The most common causes of P05E4 include: Short circuit of the signal wire of the switch to the car body; Moisture entering the switch connector with the formation of a conductive path to ground; Breakage of the power wire while maintaining a short circuit of the signal wire; Internal short in the parking brake switch itself.

How do I fix a P05E4 diagnostic trouble code?

To fix P05E4: Read fault codes and check related brake system codes. Measure the voltage on the signal wire of the switch with the ignition on in both brake positions. Disconnect the switch connector: if the voltage rises, there is a short circuit inside the switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05E4?

Limited driving only, diagnose soon

How much does it cost to fix P05E4?

The estimated repair cost for P05E4 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat