OBD Guide
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P0CA8

Hybrid/EV Battery Temperature Sensor M Circuit

P0CA8 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Temperature Sensor M Circuit. Common causes: open or short circuit in sensor wiring, faulty temperature sensor (thermistor). Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Check Engine light comes on
  • Hybrid system power reduction
  • Reduced efficiency and range
  • Battery error message on display
  • Incorrect operation of the battery cooling system

Causes

  • Open or short circuit in sensor wiring
  • Faulty temperature sensor (thermistor)
  • Poor electrical connection or connector corrosion
  • Battery Management Module (BMS) internal failure
  • Damage to the wiring harness near the battery compartment

How to Fix

  1. Visual inspection of the sensor wiring and connectors for damage and corrosion
  2. Checking the resistance and reference voltage on the sensor circuit
  3. Comparing the readings of a faulty sensor with the working ones in the system
  4. Replacing a faulty temperature sensor
  5. Clearing error codes and performing a test run

Related codes

P0CA5P0CA6P0CA7P0CA9

Error P0CA8 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0CA8 code mean?

P0CA8 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Temperature Sensor M Circuit

What causes a P0CA8 error code?

The most common causes of P0CA8 include: Open or short circuit in sensor wiring; Faulty temperature sensor (thermistor); Poor electrical connection or connector corrosion; Battery Management Module (BMS) internal failure.

How do I fix a P0CA8 diagnostic trouble code?

To fix P0CA8: Visual inspection of the sensor wiring and connectors for damage and corrosion. Checking the resistance and reference voltage on the sensor circuit. Comparing the readings of a faulty sensor with the working ones in the system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0CA8?

Yes, but get it checked soon

How much does it cost to fix P0CA8?

The estimated repair cost for P0CA8 is $28–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat