What does code P203F mean?

What does code P203F mean?

The Reductant Level Sensor tells the engine computer (PCM) how much DEF is left in the tank. If the PCM sees that the DEF level is too low, code P203F is set. Additional warnings may be present on the instrument cluster. Failure to add DEF fluid may result in the engine not restarting until more DEF fluid is added.

How do I fix code P203F?

How To Correct P203F Reductant Level Too Low

1. Repair or replace the DEF.
2. Repair or replace DEF sensor.
3. Repair or replace Fuel filler neck.
4. Repair or replace ECM.
5. Repair or replace ECU.
6. Repair or replace discrete level sensor.

What is code P207F?

OBD-II Code P207F is defined as a Reductant Quality Performance. The engine computer (PCM) monitors the Reductant Catalyst System’s use of DEF and its ability to convert NOx to Nitrogen, Carbon Dioxide, and Water. If the Reductant Catalyst fails to perform its job efficiently, code P207F is set.

What is a reductant level sensor?

The Reductant Level Sensor tells the engine computer (PCM) how much DEF is left in the tank. If the PCM detects an implausible signal from the Reductant Level Sensor, code P203D is set. This sensor is usually built into the Reductant Tank.

Will low DEF set a fault code?

No no, a low level will not trigger check engine light! It will however give you countdown to no start. Bad/diluted DEF will give you the errors above, and sometimes a failing NOx sensor. Might want to check the tip of the metering valve into the exhaust.

What is a reductant heater and sender assembly?

The reductant heater and sender assembly level sensor incorporates four stainless steel electrodes. Three electrodes arranged vertically provide a high, middle, and low level signal and the fourth electrode runs the length of the level sensor and acts as a ground. The reductant is a good conductor of electricity.