OBD Guide
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P00B4

Radiator Coolant Temperature Sensor Circuit High

P00B4 is an OBD-II diagnostic trouble code meaning: Radiator Coolant Temperature Sensor Circuit High. Common causes: open circuit in the sensor wiring harness, high resistance in the sensor circuit. Estimated repair cost: $33–89.

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

Symptoms

  • Incorrect temperature readings on the dashboard
  • Engine overheating
  • Radiator fan does not turn on
  • Increased fuel consumption
  • Poor engine idling

Causes

  • Open circuit in the sensor wiring harness
  • High resistance in the sensor circuit
  • Radiator coolant temperature sensor malfunction
  • Short circuit in the circuit
  • Problems with the sensor connector
  • ECU malfunction

How to Fix

  1. Check the condition of the wiring harness and sensor connector
  2. Measure the resistance of the radiator coolant temperature sensor
  3. Check the voltage in the sensor circuit
  4. Replace radiator coolant temperature sensor if necessary
  5. Check and replace wiring harness if necessary
  6. Scan the system for other errors

Related codes

P0113P0112P0128

Error P00B4 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P00B4 code mean?

P00B4 is an OBD-II diagnostic trouble code that indicates: Radiator Coolant Temperature Sensor Circuit High

What causes a P00B4 error code?

The most common causes of P00B4 include: Open circuit in the sensor wiring harness; High resistance in the sensor circuit; Radiator coolant temperature sensor malfunction; Short circuit in the circuit.

How do I fix a P00B4 diagnostic trouble code?

To fix P00B4: Check the condition of the wiring harness and sensor connector. Measure the resistance of the radiator coolant temperature sensor. Check the voltage in the sensor circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P00B4?

Limited driving only, diagnose soon

How much does it cost to fix P00B4?

The estimated repair cost for P00B4 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat