P203C

Reductant Level Sensor A Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$50–133 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Low AdBlue level message (even with a full tank)
Increased fuel consumption
Possible problems starting the engine

Causes

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

How to Fix

Check AdBlue level
Inspect the sensor connector and wiring for damage.
Check the resistance and voltage in the sensor circuit
If necessary, replace the reagent level sensor
Check and update the SCR control unit software

Related codes

P203D P203E P2047