P203C
Reductant Level Sensor A Circuit Low
P203C is an OBD-II diagnostic trouble code meaning: Reductant Level Sensor A Circuit Low. Common causes: reagent level sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $50–133.
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
Error P203C by Vehicle Brand
FAQ
What does the P203C code mean?
P203C is an OBD-II diagnostic trouble code that indicates: Reductant Level Sensor A Circuit Low
What causes a P203C error code?
The most common causes of P203C include: Reagent level sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Problems with the SCR control unit.
How do I fix a P203C diagnostic trouble code?
To fix P203C: Check AdBlue level. Inspect the sensor connector and wiring for damage.. Check the resistance and voltage in the sensor circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P203C?
Yes, but get it checked soon
How much does it cost to fix P203C?
The estimated repair cost for P203C is $50–133. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat