OBD Guide
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P0940

Hydraulic Oil Temperature Sensor Circuit High

P0940 is an OBD-II diagnostic trouble code meaning: Hydraulic Oil Temperature Sensor Circuit High. Common causes: hydraulic oil temperature sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Incorrect hydraulic oil temperature readings
  • Hydraulic system overheating
  • Unstable transmission operation
  • Check Engine light comes on

Causes

  • Hydraulic oil temperature sensor malfunction
  • Open or short circuit in the sensor circuit
  • Poor contact in connectors
  • Wiring harness damage
  • Problems with the controller

How to Fix

  1. Check hydraulic oil temperature sensor
  2. Inspect the sensor circuit for damage
  3. Check connectors and contacts
  4. Replace sensor if necessary
  5. Test the operation of the system after repair

Related codes

P0930P0941P0942

Error P0940 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0940 code mean?

P0940 is an OBD-II diagnostic trouble code that indicates: Hydraulic Oil Temperature Sensor Circuit High

What causes a P0940 error code?

The most common causes of P0940 include: Hydraulic oil temperature sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in connectors; Wiring harness damage.

How do I fix a P0940 diagnostic trouble code?

To fix P0940: Check hydraulic oil temperature sensor. Inspect the sensor circuit for damage. Check connectors and contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0940?

Yes, but get it checked soon

How much does it cost to fix P0940?

The estimated repair cost for P0940 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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