OBD Guide
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P06B2

Sensor Power Supply A Circuit High

P06B2 is an OBD-II diagnostic trouble code meaning: Sensor Power Supply A Circuit High. Common causes: break in the load part of the sensor power supply circuit (all sensors are disabled), shorting the sensor power line to a wire with a higher voltage. Estimated repair cost: $6–222.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–222 (est.)

Symptoms

  • Check Engine Light Is On
  • Inflated readings from group A sensors
  • Many related error codes
  • Unstable engine operation or emergency mode
  • Possible physical damage to sensors due to prolonged high voltage

Causes

  • Break in the load part of the sensor power supply circuit (all sensors are disabled)
  • Shorting the sensor power line to a wire with a higher voltage
  • Malfunction of the sensor power supply stabilizer in the ECU
  • Damage to the wiring harness with contact with the body power circuit
  • Non-original sensor that disrupts the normal operation of the circuit

How to Fix

  1. Read error codes, identify group A sensors
  2. Measure the voltage on the power line (if P06B2 is above normal)
  3. Disconnect all sensors in group A and measure the voltage again
  4. If the voltage has returned to normal, connect the sensors in series to find the faulty one.
  5. If the voltage remains high with all sensors disconnected, the problem is in the ECU or the wiring to it.
  6. Fix the malfunction, reset the codes, check the result

Related codes

P06B0P06B1P06B5P0642P0652

Error P06B2 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06B2 code mean?

P06B2 is an OBD-II diagnostic trouble code that indicates: Sensor Power Supply A Circuit High

What causes a P06B2 error code?

The most common causes of P06B2 include: Break in the load part of the sensor power supply circuit (all sensors are disabled); Shorting the sensor power line to a wire with a higher voltage; Malfunction of the sensor power supply stabilizer in the ECU; Damage to the wiring harness with contact with the body power circuit.

How do I fix a P06B2 diagnostic trouble code?

To fix P06B2: Read error codes, identify group A sensors. Measure the voltage on the power line (if P06B2 is above normal). Disconnect all sensors in group A and measure the voltage again. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06B2?

Do not drive — repair immediately

How much does it cost to fix P06B2?

The estimated repair cost for P06B2 is $6–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat