OBD Guide
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P05D6

Driver Mode Select Switch B Circuit High

P05D6 is an OBD-II diagnostic trouble code meaning: Driver Mode Select Switch B Circuit High. Common causes: switch b signal wire short to supply voltage, damage to the insulation of the wiring harness under the instrument panel. Estimated repair cost: $17–67.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–67 (est.)

Symptoms

  • Check Engine Light Is On
  • Fixation in one driving mode without the possibility of changing
  • Incorrect operation of the adaptive transmission or suspension
  • Error or warning on the instrument panel
  • Changed engine response to the gas pedal

Causes

  • Switch B signal wire short to supply voltage
  • Damage to the insulation of the wiring harness under the instrument panel
  • Internal short in mode switch B
  • Connector oxidation leading to stray voltage
  • ECU malfunction (rare)

How to Fix

  1. Read all fault codes and write down associated codes
  2. Disconnect switch B connector and check the voltage on the signal wire - it should drop to zero when the switch is disconnected
  3. If the voltage remains high when the connector is disconnected, look for a short in the wiring harness.
  4. Inspect the harness in the area of the steering column and under the instrument panel for abrasions and short circuits.
  5. Check the serviceability of the switch itself with an ohmmeter
  6. Repair short in wiring or replace mode switch B

Related codes

P05D4P05D5P05D7P05D2P05D3

Error P05D6 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05D6 code mean?

P05D6 is an OBD-II diagnostic trouble code that indicates: Driver Mode Select Switch B Circuit High

What causes a P05D6 error code?

The most common causes of P05D6 include: Switch B signal wire short to supply voltage; Damage to the insulation of the wiring harness under the instrument panel; Internal short in mode switch B; Connector oxidation leading to stray voltage.

How do I fix a P05D6 diagnostic trouble code?

To fix P05D6: Read all fault codes and write down associated codes. Disconnect switch B connector and check the voltage on the signal wire - it should drop to zero when the switch is disconnected. If the voltage remains high when the connector is disconnected, look for a short in the wiring harness.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05D6?

Yes, but get it checked soon

How much does it cost to fix P05D6?

The estimated repair cost for P05D6 is $17–67. Actual cost depends on your vehicle, location, and labor rates.

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