What does p20b9 mean on a reductant heater?
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…
How to clear DEF system diagnostic code p20b9?
Took it over to my favorite mechanic and he fixed it by installing a light bulb in place of the heater circuit, clearing the code and requesting a DEF system diagnostic on his scan tool. Total parts about $12 and an hour labour.
How to bypass bypass code p20b9 until delete?
The reductant heater 1 in my 2011 just took a crap with code P20B9 and I tried to bypass it with a 2.2ohm 1 watt metal film resistor. When commanding the the active test on all three heaters, the test for open circuit on heater one all of a sudden kept showing fail and would not clear. Aparrently when commanding test it burned up the resistor.
What causes a heater to set code p20ba?
Code P20BA will set when the either the power or ground circuit voltage is too low or too high when it should not be, or the heater does not operate within the time frame specified by the manufacturer. What are the common causes of code P20BA?
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…
What does the p20b9 code stand for?
P20b9 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.
Why is code p20b9 stored in the DEF tank?
The Reductant Catalyst (SRC) was added to further reduce any NOx was still in the exhaust stream. The Reductant Heater warms the Reductant (DEF) tank to prevent crystallization of the DEF when it’s cold out. If the Reductant Heater does not perform as requested, code P20B9 is stored. No comments yet…
What are the symptoms of a p20bd trouble code?
Symptoms of a P20BD trouble code may include: Diminished engine performance Excessive black smoke from vehicle exhaust Reduction in fuel efficiency What are some of the common causes of the code? Causes for this code may include: Open or shorted circuits in the reductant heater control Defective reductant temperature sensor