OBD Guide
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P0036

HO2S Heater Control Circuit Bank 1 Sensor 2

P0036 is an OBD-II diagnostic trouble code meaning: HO2S Heater Control Circuit Bank 1 Sensor 2. Common causes: faulty oxygen sensor heating element, broken wiring in the heater circuit. Estimated repair cost: $33–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–89 (est.)

Symptoms

  • Check Engine Light Illuminates
  • Increased fuel consumption
  • Unstable engine idling
  • Deterioration in acceleration dynamics
  • Increased toxicity of exhaust gases
  • Possible interruptions in engine operation when warming up

Causes

  • Faulty oxygen sensor heating element
  • Broken wiring in the heater circuit
  • Short circuit in the heater circuit
  • Oxidation or corrosion of sensor connector contacts
  • Oxygen sensor heater relay malfunction
  • Failure of the heater circuit fuse
  • Engine control unit (ECU) malfunction

How to Fix

  1. Connect a diagnostic scanner and read all error codes
  2. Check the oxygen sensor heater circuit fuses and relays.
  3. Measure the resistance of the sensor heating element (should be 2-14 Ohms)
  4. Check the integrity of the wiring from the ECU to the oxygen sensor
  5. Check the supply voltage at the sensor connector (should be 12V)
  6. Inspect the sensor connector for corrosion and oxidation
  7. If necessary, replace the oxygen sensor
  8. Clear error codes and test drive
  9. Recheck the system with a diagnostic scanner

Related codes

P0030P0031P0032P0037P0038P0135P0141

Error P0036 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0036 code mean?

P0036 is an OBD-II diagnostic trouble code that indicates: HO2S Heater Control Circuit Bank 1 Sensor 2

What causes a P0036 error code?

The most common causes of P0036 include: Faulty oxygen sensor heating element; Broken wiring in the heater circuit; Short circuit in the heater circuit; Oxidation or corrosion of sensor connector contacts.

How do I fix a P0036 diagnostic trouble code?

To fix P0036: Connect a diagnostic scanner and read all error codes. Check the oxygen sensor heater circuit fuses and relays.. Measure the resistance of the sensor heating element (should be 2-14 Ohms). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0036?

Limited driving only, diagnose soon

How much does it cost to fix P0036?

The estimated repair cost for P0036 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat