OBD Guide
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P2743

Transmission Fluid Temperature Sensor B Circuit High

P2743 is an OBD-II diagnostic trouble code meaning: Transmission Fluid Temperature Sensor B Circuit High. Common causes: open or short circuit in tft b sensor circuit, faulty tft sensor b. Estimated repair cost: $17–56.

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

Symptoms

  • Difficulty shifting gears
  • Incorrect operation of torque converter locking
  • Increased fuel consumption
  • Check Engine Light Is On
  • Transmission overheating (in rare cases)

Causes

  • Open or short circuit in TFT B sensor circuit
  • Faulty TFT sensor B
  • Poor contact in TFT sensor connector B
  • Wiring harness damage
  • Engine control unit (ECU) malfunction (rare)

How to Fix

  1. Check the level and condition of the transmission fluid.
  2. Check the TFT B sensor wiring and connectors for damage or corrosion.
  3. Measure the resistance of TFT sensor B. Compare the readings to the manufacturer's specifications.
  4. Check the voltage in the TFT sensor B circuit.
  5. Replace TFT sensor B if faulty.
  6. Check the ECU for damage or corrosion.

Related codes

P2740P2741P2742P2744

Error P2743 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P2743 code mean?

P2743 is an OBD-II diagnostic trouble code that indicates: Transmission Fluid Temperature Sensor B Circuit High

What causes a P2743 error code?

The most common causes of P2743 include: Open or short circuit in TFT B sensor circuit; Faulty TFT sensor B; Poor contact in TFT sensor connector B; Wiring harness damage.

How do I fix a P2743 diagnostic trouble code?

To fix P2743: Check the level and condition of the transmission fluid.. Check the TFT B sensor wiring and connectors for damage or corrosion.. Measure the resistance of TFT sensor B. Compare the readings to the manufacturer's specifications.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P2743?

Yes, but get it checked soon

How much does it cost to fix P2743?

The estimated repair cost for P2743 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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