P204D

Reductant Pressure Sensor Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$50–133 (est.)

Symptoms

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

Causes

Reductant pressure sensor malfunction
Short circuit in the sensor circuit
Broken or damaged wiring harness
Problems with the SCR control module
Reductant pump malfunction

How to Fix

Check the integrity of the sensor electrical circuit
Test the reductant pressure sensor
Check connectors and connections for corrosion
Inspect the wiring harness for damage
If necessary, replace the reducer pressure sensor

Related codes

P204E P204F P205D