P203E

Reductant Level Sensor A Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased consumption of AdBlue reagent
Unstable reagent level readings
SCR system error message on instrument panel

Causes

Poor contact in the sensor connector
Open or short circuit in the sensor circuit
Reagent level sensor malfunction
Problems with the SCR control unit
Corroded contacts or damaged wiring harness

How to Fix

Check connections and sensor connector for corrosion or damage.
Check the continuity of the sensor circuit (resistance, short circuit)
Check the functionality of the reagent level sensor
If necessary, replace the reagent level sensor
Reset the error code and check the system after repair

Related codes

P203F P2047 P204D