Table of Contents
How do I fix code P20B9?
How To Correct P20B9 Reductant Heater A Control Circuit/Open
- Changing the broken reductant heater ‘A’ control circuit.
- The opening or the shorted circuit of the reductant heater ‘A’ control must be quickly fixed.
- Quickly replacing the dirty diesel exhaust fluid.
- Replacing the broken glow plugs.
What is a reductant heater a control performance?
The reductant heater is a component that is used to prevent diesel exhaust fluid from freezing or crystallizing in low temperatures. It is usually located in the diesel exhaust fluid filter reservoir and/or the reductant injector supply hose(s).
Where is def heater located?
DEF Dosing Line Heater – A DEF dosing line heater is located at the end of the DEF dosing line where it meets the DEF pump. This heater is used to heat the dosing line between the DEF pump and the DEF dosing valve to prevent freezing during vehicle operation.
Where is the DEF heater located?
What is a reductant tank heater?
OBD-II Code P202B is defined as a Reductant Tank Heater Control Circuit Low. Newer diesel vehicles have a Diesel Particulate Filter to reduce soot emissions. This filter uses DEF Fluid to assist in the burning off soot. The Reductant Tank Heater heats the DEF Fluid to the temperature is more efficient.
How do you unfreeze a DEF tank?
Most after-treatment systems have a built-in DEF tank heater that will thaw the fluid during normal vehicle operation. If your vehicle’s SCR has a built-in DEF tank heater, turn the vehicle on to initiate the thawing process.
How do I reset my DEF pump?
To reset the fault, you will need to remove the negative battery cable for about 30 seconds. This will clear any codes that may have been stored in the system. Once you have done this, you can start your truck and fill up the DEF tank.
Where is the DEF level sensor located?
A DEF quality sensor is mounted on the side of the DEF tank. This sensor detects the Urea concentration in the DEF to confirm it is acceptable for effective dosing (approximately 32.5% Urea).
What does the p20b9 code on a thermostat mean?
| What is P20B9 code meaning? The reductant heater and sender assembly contains pickup tube for reductant pump module, an electric heating element, a reductant temperature sensor and an electrode type level sensor. The heating element is directly above pickup tubes inlet filter.
What does the code p20b9 mean on a Honda Accord?
A stored code P20B9 means that the powertrain control module (PCM) has detected no voltage in the control circuit for the on-board reductant heater designated with the letter A. This designation is used where multiple reductant heaters are in use, consult a vehicle specific repair manual to determine which is the A circuit for your application.
What does code p20b9 mean on a DEF tank?
If the PCM detects no voltage on the control circuit for reductant heater A, a code P20B9 will be stored and a malfunction indicator lamp may be illuminated. Reductant heaters may be inside a DEF tank (example shown here):
What should I do if I have stored code p20b9?
A stored code P20B9 should be considered severe and addressed as quickly as possible. The SCR system could be disabled because of it. Catalyst damage could result if the conditions which contributed to the code being stored are not rectified in a timely manner. What are some of the symptoms of the code?