OBD Guide
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P05D1

Driver Mode Select Switch A Circuit Low

P05D1 is an OBD-II diagnostic trouble code meaning: Driver Mode Select Switch A Circuit Low. Common causes: switch a signal wire short to ground, loss of switch power (broken reference wire). Estimated repair cost: $22–167.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–167 (est.)

Symptoms

  • Check Engine light is on
  • Mode selection switch A does not work
  • System fixed in default mode
  • Fault warning message on the information display
  • Complete loss of the ability to change the driving mode via switch A

Causes

  • Switch A signal wire short to ground
  • Loss of switch power (broken reference wire)
  • Internal short circuit of switch A to the body
  • Severe oxidation of connector contacts with large voltage drop
  • Mechanical sticking of the switch (constantly pressed position)

How to Fix

  1. Read frozen frame codes and data with a diagnostic scanner
  2. Inspect switch A: there is no mechanical binding, foreign objects under the button
  3. Check the switch connector for oxidation and contact damage
  4. Disconnect the switch connector and measure the voltage on the reference wire - it should be about 5V
  5. If there is a reference voltage: measure the resistance between the signal wire and ground with the switch off - a short will indicate damage to the wiring
  6. Replace the switch or repair damaged wiring

Related codes

P05D0P05BEP05C9

Error P05D1 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05D1 code mean?

P05D1 is an OBD-II diagnostic trouble code that indicates: Driver Mode Select Switch A Circuit Low

What causes a P05D1 error code?

The most common causes of P05D1 include: Switch A signal wire short to ground; Loss of switch power (broken reference wire); Internal short circuit of switch A to the body; Severe oxidation of connector contacts with large voltage drop.

How do I fix a P05D1 diagnostic trouble code?

To fix P05D1: Read frozen frame codes and data with a diagnostic scanner. Inspect switch A: there is no mechanical binding, foreign objects under the button. Check the switch connector for oxidation and contact damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05D1?

Do not drive — repair immediately

How much does it cost to fix P05D1?

The estimated repair cost for P05D1 is $22–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat