OBD Guide
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P0063

HO2S Heater Control Circuit Low Bank 2 Sensor 3

P0063 is an OBD-II diagnostic trouble code meaning: HO2S Heater Control Circuit Low Bank 2 Sensor 3. Common causes: faulty oxygen sensor (lambda probe), open or short circuit in heater wiring. Estimated repair cost: $11–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$11–89 (est.)

Symptoms

  • Check Engine Light Illuminated
  • Increased fuel consumption
  • Unstable engine operation at idle
  • Reduced acceleration dynamics
  • Increased toxicity of exhaust gases
  • Possible misfires

Causes

  • Faulty oxygen sensor (lambda probe)
  • Open or short circuit in heater wiring
  • Corrosion or oxidation of connector contacts
  • Faulty heater circuit fuse
  • Problems in the engine control unit
  • Wiring harness damage
  • Bad sensor ground

How to Fix

  1. Read error codes with a diagnostic scanner
  2. Check oxygen sensor circuit fuses
  3. Inspect the sensor connector for corrosion and damage.
  4. Measure the resistance of the sensor heater (should be 2-14 Ohms)
  5. Check the supply voltage at the sensor connector
  6. Check the wiring from the sensor to the control unit
  7. If necessary, replace the oxygen sensor
  8. Clean the connector contacts and treat with a protective compound
  9. Clear error codes and take a test drive

Related codes

P0053P0054P0059P0060P0135P0141P0155P0161

Error P0063 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0063 code mean?

P0063 is an OBD-II diagnostic trouble code that indicates: HO2S Heater Control Circuit Low Bank 2 Sensor 3

What causes a P0063 error code?

The most common causes of P0063 include: Faulty oxygen sensor (lambda probe); Open or short circuit in heater wiring; Corrosion or oxidation of connector contacts; Faulty heater circuit fuse.

How do I fix a P0063 diagnostic trouble code?

To fix P0063: Read error codes with a diagnostic scanner. Check oxygen sensor circuit fuses. Inspect the sensor connector for corrosion and damage.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0063?

Limited driving only, diagnose soon

How much does it cost to fix P0063?

The estimated repair cost for P0063 is $11–89. Actual cost depends on your vehicle, location, and labor rates.

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