OBD Guide
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P06B1

Sensor Power Supply A Circuit Low

P06B1 is an OBD-II diagnostic trouble code meaning: Sensor Power Supply A Circuit Low. Common causes: short to ground in the circuit of one of the sensors of group a, faulty sensor with breakdown to ground. 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
  • Low readings from group A sensors
  • Unstable engine operation
  • Many associated sensor errors
  • The engine may go into emergency mode

Causes

  • Short to ground in the circuit of one of the sensors of group A
  • Faulty sensor with breakdown to ground
  • Damage to the wiring harness (chaining to body weight)
  • Moisture ingress causing current leakage
  • High contact resistance in the power connector

How to Fix

  1. Read error codes, identify sensors of group A according to the diagram
  2. Measure the voltage on the power line (if P06B1 will be below normal)
  3. Disconnect sensors one at a time - when voltage is restored, the culprit is found
  4. Check the resistance between the power supply and ground of the disconnected sensor
  5. Replace the faulty sensor or repair the short in the wiring
  6. Reset codes and make sure voltage level is normal

Related codes

P06B0P06B2P06B3P0641P0651

Error P06B1 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06B1 code mean?

P06B1 is an OBD-II diagnostic trouble code that indicates: Sensor Power Supply A Circuit Low

What causes a P06B1 error code?

The most common causes of P06B1 include: Short to ground in the circuit of one of the sensors of group A; Faulty sensor with breakdown to ground; Damage to the wiring harness (chaining to body weight); Moisture ingress causing current leakage.

How do I fix a P06B1 diagnostic trouble code?

To fix P06B1: Read error codes, identify sensors of group A according to the diagram. Measure the voltage on the power line (if P06B1 will be below normal). Disconnect sensors one at a time - when voltage is restored, the culprit is found. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06B1?

Do not drive — repair immediately

How much does it cost to fix P06B1?

The estimated repair cost for P06B1 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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