P20AE

Reductant Metering Unit Temperature Sensor Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Possible transition to emergency mode
Increased NOx emissions

Causes

Open or short circuit in the sensor circuit
Reductant temperature sensor malfunction
Poor contact in the sensor connector
Wiring harness damage
Problems with the SCR control unit

How to Fix

Check the integrity of the sensor circuit
Inspect connectors and connections for corrosion
Check the resistance of the temperature sensor
Replace the reductant temperature sensor if necessary
Check the operation of the SCR system after repair

Related codes

P20EE P20E9 P20E8