OBD Guide
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P06D6

Sensor Reference Voltage F Circuit/Open

P06D6 is an OBD-II diagnostic trouble code meaning: Sensor Reference Voltage F Circuit/Open. Common causes: open 5v reference wire in circuit f, insulation damage and wire short to ground. Estimated repair cost: $17–889.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$17–889 (est.)

Symptoms

  • Multiple sensor error codes appearing at the same time
  • Engine transition to emergency mode
  • Check Engine light on
  • Unstable engine operation or inability to start
  • Loss of signal from one or more critical sensors

Causes

  • Open 5V reference wire in circuit F
  • Insulation damage and wire short to ground
  • Internal ECU fault
  • Corrosion or mechanical damage to the ECU connector
  • Sensor malfunction causing an open circuit

How to Fix

  1. Read all error codes and record additional sensor codes
  2. Using the electrical diagram, determine the sensors of the reference voltage circuit F
  3. Measure the voltage at the sensor connectors of circuit F with the ignition on
  4. Check the integrity of the reference voltage wire from the ECU to each sensor
  5. Disconnect sensors one by one to identify the source of the malfunction
  6. If there is no voltage at the ECU output, diagnose the control unit

Related codes

P06D7P06D8P06D9P06D2P0651

Error P06D6 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06D6 code mean?

P06D6 is an OBD-II diagnostic trouble code that indicates: Sensor Reference Voltage F Circuit/Open

What causes a P06D6 error code?

The most common causes of P06D6 include: Open 5V reference wire in circuit F; Insulation damage and wire short to ground; Internal ECU fault; Corrosion or mechanical damage to the ECU connector.

How do I fix a P06D6 diagnostic trouble code?

To fix P06D6: Read all error codes and record additional sensor codes. Using the electrical diagram, determine the sensors of the reference voltage circuit F. Measure the voltage at the sensor connectors of circuit F with the ignition on. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06D6?

Do not drive — repair immediately

How much does it cost to fix P06D6?

The estimated repair cost for P06D6 is $17–889. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat