OBD Guide
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P06B3

Sensor Power Supply B Circuit/Open

P06B3 is an OBD-II diagnostic trouble code meaning: Sensor Power Supply B Circuit/Open. Common causes: broken power supply wire for group b sensors, blown group b power fuse. Estimated repair cost: $1–56.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$1–56 (est.)

Symptoms

  • Check Engine Light Is On
  • Multiple simultaneous sensor error codes
  • Unstable engine operation or emergency mode
  • Incorrect or zero readings from group B sensors
  • Difficulty starting or stopping the engine

Causes

  • Broken power supply wire for group B sensors
  • Blown Group B power fuse
  • Short circuit with subsequent activation of the ECU protection
  • Oxidation or poor contact in the ECU connector
  • Malfunction of the internal sensor power supply in the ECU

How to Fix

  1. Read all error codes, identify group B sensors according to the car diagram
  2. Check the power supply fuse for group B sensors
  3. Measure the voltage on the power line with the ignition on
  4. Check the wires from the ECU to the group B sensors for a break
  5. Repair the break, replace the fuse or faulty sensor
  6. Reset error codes and check for restoration of normal operation

Related codes

P06B4P06B5P06B0P0651P0652

Error P06B3 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06B3 code mean?

P06B3 is an OBD-II diagnostic trouble code that indicates: Sensor Power Supply B Circuit/Open

What causes a P06B3 error code?

The most common causes of P06B3 include: Broken power supply wire for group B sensors; Blown Group B power fuse; Short circuit with subsequent activation of the ECU protection; Oxidation or poor contact in the ECU connector.

How do I fix a P06B3 diagnostic trouble code?

To fix P06B3: Read all error codes, identify group B sensors according to the car diagram. Check the power supply fuse for group B sensors. Measure the voltage on the power line with the ignition on. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06B3?

Do not drive — repair immediately

How much does it cost to fix P06B3?

The estimated repair cost for P06B3 is $1–56. Actual cost depends on your vehicle, location, and labor rates.

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