P20E4

Exhaust Gas Temperature Sensor 2/3 Correlation Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Deterioration of vehicle dynamics
Increased fuel consumption
Problems with diesel particulate filter regeneration
Possible transition to emergency mode

Causes

Exhaust temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Problems with the engine control unit
Mechanical damage to wiring

How to Fix

Check the readings of the exhaust temperature sensors with a scanner
Inspect the wiring and sensor connectors
Check sensor resistance
If necessary, replace the faulty sensor
Check the operation of the system after repair

Related codes

P20E5 P20E6 P0544