P204B

Reductant Pressure Sensor Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unpleasant exhaust smell
Possible transition to emergency mode

Causes

Reagent pressure sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Problems with the SCR control unit
Sensor is dirty or damaged

How to Fix

Check the continuity of the reagent pressure sensor circuit
Inspect connectors and contacts for corrosion or damage
Check the functionality of the pressure sensor
If necessary, replace the reagent pressure sensor
Test the system after repair

Related codes

P204A P204C P204D