The diagnostic trouble code P2056 indicates that the reductant injector that is located on bank 2 of the exhaust (system) has an open circuit.
What is a reductant injector?
The reductant injector is used to reduce emissions gases exiting the exhaust by injecting either air or chemicals depending on the usage and vehicle. When the ECU detects the fault in the reductant injector circuit, it will set the P2047 code and the Check Engine Light will be displayed on the dashboard.
What is code P202E?
The P202E error code is known as reductant injector- circuit range/performance bank 1 unit 1. This error will be set in the vehicle if the PCM determines the voltage in the control circuit which is out of the predictable or suitable range.
What is a reductant valve?
OBD-II Code P2047 is defined as a Reductant Injection Valve Circuit/Open. Diesel Exhaust Fluid (DEF) is used to assist in converting leftover exhaust particles to harmless gases. In order to burn off those particles, the temperature of the exhaust system needs to increase.
What is reductant level?
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.
What module controls the reductant tank?
PCM
The PCM controls the reductant heating element based off of input from the reductant temperature sensor. The reductant heater is designed to create enough liquid DEF to maintain system functionality in cold climates, it may not thaw all of the DEF in the 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 does reductant pressure too low mean?
OBD-II Code Powertrain Control Module (PCM) failure is defined as a Reductant Pressure Too Low. Diesel Exhaust Fluid (DEF) is used to assist in converting leftover exhaust particles to harmless gases. In order to burn off those particles, the temperature of the exhaust system needs to increase.
How do you fix reductant pressure too low?
How To Correct Reductant Pressure Too Low Issue
- You must fix the defective reductant pump.
- Make sure to mend the faulty reductant injector.
- It is essential to restore the flawed reductant purge valve.
- Repair or replace the quirky reductant pressure line.
- Rehabilitate the defaults in the reductant pressure sensor.
What is a reductant pump?
The Reductant Pump transfers the DEF (Diesel Exhaust Fluid) from the tank to the DEF Injector. If the Reductant Pump fails to perform as requested by the engine computer (PCM), code P208A will be stored.