OBD Guide
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P06D3

Sensor Reference Voltage E Circuit Low

P06D3 is an OBD-II diagnostic trouble code meaning: Sensor Reference Voltage E Circuit Low. Common causes: circuit e wiring short circuit to ground, internal sensor fault with short circuit. Estimated repair cost: $9–67.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$9–67 (est.)

Symptoms

  • Multiple sensor error codes simultaneously
  • Unstable operation and floating engine speeds
  • Incorrect sensor readings on the diagnostic scanner
  • Switching to emergency mode with power limitation
  • Check Engine light on

Causes

  • Circuit E wiring short circuit to ground
  • Internal sensor fault with short circuit
  • Moisture in the ECU connector or wiring harness
  • Damaged reference wire insulation
  • Faulty internal ECU reference voltage

How to Fix

  1. Check the voltage at the reference voltage terminal E with the ignition on (normal is about 5 V)
  2. Determine the list of circuit E sensors from the vehicle wiring diagram
  3. Turn off the E circuit sensors one by one, monitoring the voltage change
  4. If a culprit sensor is detected, check its internal resistance and replace it
  5. Check the wiring for abrasions and short circuits to the body
  6. If the voltage remains low with all sensors disabled, diagnose the ECU

Related codes

P06D2P06D4P06D5P0641P0651

Error P06D3 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06D3 code mean?

P06D3 is an OBD-II diagnostic trouble code that indicates: Sensor Reference Voltage E Circuit Low

What causes a P06D3 error code?

The most common causes of P06D3 include: Circuit E wiring short circuit to ground; Internal sensor fault with short circuit; Moisture in the ECU connector or wiring harness; Damaged reference wire insulation.

How do I fix a P06D3 diagnostic trouble code?

To fix P06D3: Check the voltage at the reference voltage terminal E with the ignition on (normal is about 5 V). Determine the list of circuit E sensors from the vehicle wiring diagram. Turn off the E circuit sensors one by one, monitoring the voltage change. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06D3?

Do not drive — repair immediately

How much does it cost to fix P06D3?

The estimated repair cost for P06D3 is $9–67. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat