P20B0

Reductant Metering Unit Temperature Sensor Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased fuel consumption
Activation of emergency operation
Unstable engine idling

Causes

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

How to Fix

Check the integrity of the wiring and connectors of the sensor
Check the resistance of the temperature sensor
Check reference voltage and signal circuit
If necessary, replace the reductant temperature sensor
Scan the system for additional trouble codes

Related codes

P20A4 P20B1 P20B2