P2477

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

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

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
Replacing a faulty exhaust gas temperature sensor
Repair or replace damaged wiring

Related codes

P2476 P2478 P2479