P204C

Reductant Pressure Sensor Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Low AdBlue level message
Unstable engine operation

Causes

Reagent pressure sensor malfunction
Open or short circuit in the sensor circuit
Low AdBlue level
Pressure sensor dirty
Problems with the SCR control unit

How to Fix

Check the AdBlue level and top up if necessary.
Visually inspect the wiring and connectors of the pressure sensor
Check the resistance and voltage in the sensor circuit
Replace reagent pressure sensor if necessary
Check and, if necessary, update the software of the control unit

Related codes

P204D P204E P204F