OBD Guide
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P0189

Fuel Temperature Sensor B Circuit Intermittent

P0189 is an OBD-II diagnostic trouble code meaning: Fuel Temperature Sensor B Circuit Intermittent. Common causes: damage to fuel temperature sensor wiring harness b, poor connection or corrosion in sensor connectors. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Unstable idle
  • Increased fuel consumption
  • Reduced engine power
  • Difficulty starting the engine (especially in cold weather)
  • Check Engine Light Illuminates

Causes

  • Damage to fuel temperature sensor wiring harness B
  • Poor connection or corrosion in sensor connectors
  • Malfunction of the fuel temperature sensor B itself
  • Circuit Grounding Problems
  • ECU malfunction (rare)

How to Fix

  1. Check the integrity of the fuel temperature sensor wiring harness B
  2. Check the sensor and ECU connectors for corrosion or damage.
  3. Test resistance of fuel temperature sensor B (compare with manufacturer specifications)
  4. Check the reference voltage and grounding in the sensor circuit
  5. If necessary, replace fuel temperature sensor B
  6. Clear error codes and check if P0189 returns

Related codes

P0187P0188P0190P0191

Error P0189 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0189 code mean?

P0189 is an OBD-II diagnostic trouble code that indicates: Fuel Temperature Sensor B Circuit Intermittent

What causes a P0189 error code?

The most common causes of P0189 include: Damage to fuel temperature sensor wiring harness B; Poor connection or corrosion in sensor connectors; Malfunction of the fuel temperature sensor B itself; Circuit Grounding Problems.

How do I fix a P0189 diagnostic trouble code?

To fix P0189: Check the integrity of the fuel temperature sensor wiring harness B. Check the sensor and ECU connectors for corrosion or damage.. Test resistance of fuel temperature sensor B (compare with manufacturer specifications). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0189?

Limited driving only, diagnose soon

How much does it cost to fix P0189?

The estimated repair cost for P0189 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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