Where is the reductant tank heater?

The reductant heater and sender assembly heating element is located directly above the pickup tube inlet filter.

What does a reductant tank heater do?

The Reductant Tank Heater heats the DEF Fluid to the temperature is more efficient. If the engine control module (PCM) detects the Reductant Tank Heater is not operating properly, it will set code P202B.

How do I fix code P20B9?

How To Correct P20B9 Reductant Heater A Control Circuit/Open

  1. Changing the broken reductant heater ‘A’ control circuit.
  2. The opening or the shorted circuit of the reductant heater ‘A’ control must be quickly fixed.
  3. Quickly replacing the dirty diesel exhaust fluid.
  4. Replacing the broken glow plugs.

How do you test a DEF tank heater?

Zitat von Youtube: Now we're asked to disconnect the harness to the acm. And check resistance through each leg of the circuit. Basically this continuity test is intended to check the integrity of the circuit or harness.

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.

What is a reductant heater a control performance?

OBD-II Code P20BA is defined as a Reductant Heater “A” Control Circuit Performance. 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.

Where is the 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.

Why are the reductant tank pump and lines heated?

The heating element (6) is used to prevent the fluid from freezing while the engine is running. With the engine off, the heating element will not engage and the fluid will be allowed to freeze if the ambient temperature is below the fluid’s freezing point.

What does code P20B9 mean?

Diagnostic trouble code (DTC) P20B9 stands for “Reductant Heater “A” Control Circuit/Open.” This code sets when the reductant heater doesn’t perform as expected. The P20B9 engine code can also be triggered if the powertrain control module (PCM) doesn’t detect voltage in the reductant heater A’s control circuit.

What temp does DEF freeze?


Diesel Exhaust Fluid or DEF Fluid

Whether in storage tanks or in equipment, DEF can freeze and possibly cause issues. As temperatures drop below 12°F, DEF will begin to solidify and not work as intended.