OBD Guide
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P06B5

Sensor Power Supply B Circuit High

P06B5 is an OBD-II diagnostic trouble code meaning: Sensor Power Supply B Circuit High. Common causes: break in the power supply wire for sensors of group b (all sensors have lost load), shorting the power line to a circuit with a higher voltage. Estimated repair cost: $6–56.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–56 (est.)

Symptoms

  • Check Engine Light Is On
  • Inflated readings from group B sensors or their complete absence
  • Many related sensor error codes
  • Engine emergency mode
  • Possible physical damage to sensors due to contact with high voltage

Causes

  • Break in the power supply wire for sensors of group B (all sensors have lost load)
  • Shorting the power line to a circuit with a higher voltage
  • Malfunction of the internal sensor power supply stabilizer in the ECU
  • Damage to the harness with contact with the 12V body power wires
  • Non-original sensor with non-standard circuitry

How to Fix

  1. Read codes, identify group B sensors according to the car diagram
  2. Measure the voltage on the Group B power line (expected to be higher than normal)
  3. Disconnect all sensors of group B and re-measure the voltage
  4. If the voltage has returned to normal, connect the sensors one by one and identify the faulty one.
  5. If the voltage remains high, look for contact with an external circuit or check the ECU
  6. Fix the malfunction, reset the codes, check the result

Related codes

P06B3P06B4P06B2P0652P0642

Error P06B5 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06B5 code mean?

P06B5 is an OBD-II diagnostic trouble code that indicates: Sensor Power Supply B Circuit High

What causes a P06B5 error code?

The most common causes of P06B5 include: Break in the power supply wire for sensors of group B (all sensors have lost load); Shorting the power line to a circuit with a higher voltage; Malfunction of the internal sensor power supply stabilizer in the ECU; Damage to the harness with contact with the 12V body power wires.

How do I fix a P06B5 diagnostic trouble code?

To fix P06B5: Read codes, identify group B sensors according to the car diagram. Measure the voltage on the Group B power line (expected to be higher than normal). Disconnect all sensors of group B and re-measure the voltage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06B5?

Do not drive — repair immediately

How much does it cost to fix P06B5?

The estimated repair cost for P06B5 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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