OBD Guide
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P012F

Engine Coolant Temperature / Engine Oil Temperature Correlation

P012F is an OBD-II diagnostic trouble code meaning: Engine Coolant Temperature / Engine Oil Temperature Correlation. Common causes: malfunction of the coolant temperature sensor (dtozh), malfunction of the engine oil temperature sensor. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Unstable engine operation
  • Check Engine Light Illuminates
  • Reduced engine efficiency
  • Incorrect temperature readings on the dashboard

Causes

  • Malfunction of the coolant temperature sensor (DTOZH)
  • Malfunction of the engine oil temperature sensor
  • Problems with the wiring harness or sensor connectors
  • Engine oil level is low or very dirty
  • Thermostat malfunction
  • ECU software error

How to Fix

  1. Check the level and condition of the engine oil
  2. Visually inspect temperature sensors and their connections
  3. Check sensor readings using a diagnostic scanner
  4. If necessary, replace the faulty sensor
  5. Check thermostat operation
  6. Update ECU software (if appropriate updates are available)

Related codes

P0115P0116P0117P0118

Error P012F by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P012F code mean?

P012F is an OBD-II diagnostic trouble code that indicates: Engine Coolant Temperature / Engine Oil Temperature Correlation

What causes a P012F error code?

The most common causes of P012F include: Malfunction of the coolant temperature sensor (DTOZH); Malfunction of the engine oil temperature sensor; Problems with the wiring harness or sensor connectors; Engine oil level is low or very dirty.

How do I fix a P012F diagnostic trouble code?

To fix P012F: Check the level and condition of the engine oil. Visually inspect temperature sensors and their connections. Check sensor readings using a diagnostic scanner. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P012F?

Limited driving only, diagnose soon

How much does it cost to fix P012F?

The estimated repair cost for P012F is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat