P203C

Reductant Level Sensor Circuit Low

DTC P203C, sometimes indicated as P203C00 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing reductant level sensor circuit low.

The reductant level sensor circuit is low when the reductant level sensor signal is below a predetermined level. This may be due to a low reductant level, a fault in the reductant level sensor circuit, or a fault in the reductant level sensor.
To correct this DTC, correct the reductant level, repair the fault in the reductant level sensor circuit, or replace the reductant level sensor.

P203C: Reductant Level Sensor Circuit Low
P203C: Reductant level sensor – circuit low
P203C 00: Reductant level sensor - circuit low

DTC Trouble Code Search

Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

SSM73728 - ENGINE (PWS)
JAGUAR: Issue: the customer is unable to start their vehicle or a warning message displayed on the instrument cluster "re-start will not be possible in xxxx miles". Any of the following dtc's may have been triggered: P203B, P203C, P203D, P215C. Alt

Consumer Complaints for this DTC

2016 CHEVROLET COLORADO

The def module kit was replaced on octubre 7 and the engine light is on again the codes are P203C, P204C and P205C. These codes are related with the def fluid and my truck had the low def message on twice in the last two weeks even though the truck still has def (fluid) in the tank.
FUEL/PROPULSION SYSTEM,