OBD Guide
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P2477

Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 4

P2477 is an OBD-II diagnostic trouble code meaning: Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 4. Common causes: open or short circuit in the wiring to the egt sensor, poor electrical contact in the sensor connector. Estimated repair cost: $50–133.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$50–133 (est.)

Symptoms

  • Unstable engine idling
  • Increased fuel consumption
  • Check Engine Light Illuminates
  • Reduced engine power
  • Possible errors in the operation of the catalytic converter

Causes

  • Open or short circuit in the wiring to the EGT sensor
  • Poor electrical contact in the sensor connector
  • Malfunction of the exhaust gas temperature sensor itself
  • Corroded contacts or damaged wire insulation
  • Problems with the engine control unit connector

How to Fix

  1. Visual inspection of sensor wiring and connectors for damage and corrosion
  2. Checking the resistance and voltage in the sensor circuit using a multimeter
  3. Checking EGT sensor readings using a real-time diagnostic scanner
  4. Replacing a faulty exhaust gas temperature sensor
  5. Repair or replace damaged wiring

Related codes

P2476P2478P2479

Error P2477 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P2477 code mean?

P2477 is an OBD-II diagnostic trouble code that indicates: Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 4

What causes a P2477 error code?

The most common causes of P2477 include: Open or short circuit in the wiring to the EGT sensor; Poor electrical contact in the sensor connector; Malfunction of the exhaust gas temperature sensor itself; Corroded contacts or damaged wire insulation.

How do I fix a P2477 diagnostic trouble code?

To fix P2477: Visual inspection of sensor wiring and connectors for damage and corrosion. Checking the resistance and voltage in the sensor circuit using a multimeter. Checking EGT sensor readings using a real-time diagnostic scanner. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P2477?

Yes, but get it checked soon

How much does it cost to fix P2477?

The estimated repair cost for P2477 is $50–133. Actual cost depends on your vehicle, location, and labor rates.

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