Guide To P20DB OBD Error Code Solutions
OBD Code P20DB - Exhaust Aftertreatment Fuel Supply Control Stuck Open
The trouble code
P20DB can be defined as Exhaust Aftertreatment Fuel Supply Control Stuck Open.
The exhaust fuel addition injector assembly is being monitored by the engine
control module. This trouble code would be set by the ECM when the exhaust fuel
addition injector assembly would not be as per the specifications set by the
manufacturer.
Learn More About OBD Error Code P20DB
The engine
control module, powertrain control module or the transmission control module
monitors this circuit depending upon the particular automobile. Is the check
engine light illuminating on the dashboard? Are you experiencing reduced engine
performance along with affected fuel economy? Is there black smoke emitting
from the exhaust pipe? All these are the indications of increased emissions and
affected exhaust system which in this case can be due to bad exhaust gas
temperature sensor, thus causing OBD code P20DB to get stored in the powertrain
control module.
What causes this problem with the Exhaust Aftertreatment Fuel Supply Control Stuck Open?
- Malfunctioning EAS fuel supply pump
- Faulty EAS fuel pressure sensor
- EAS fuel supply control harness might be open or little
- Substandard electrical connection in the EAS fuel supply control circuit
- There might be insufficient DEF in the EAS reservoir
- Quirks in the EAS controller/PCM or programming error
Replace/Repair These Parts To Fix Code P20DB
- Engine Control Module – ECM faults are rare but can be a big problem
as faulty ECM will cause wrong vehicle operations and can also result in wrong
OBD codes getting stored in the system which can also cause misdiagnosis. Thus,
replace faulty ECM components now!
- Powertrain Control Module – Check for PCM error which might be due to
circuit faults that might require complete replacement and reprogramming.
Replace it now!
- Diagnostic Tools – Buy quality diagnostic tools to check and
diagnose OBD code P20DB error with the help of experienced mechanic. Visit us
today!
- Exhaust Gas Recirculation Valve – Bad EGR valve can cause
many performance issues. Common signs include engine performance issues like
decreased power and acceleration, rough idle, and the Check Engine Light coming
on. Thus, replace faulty EGR valve now!
- Diesel Exhaust Fluid Pump – If the DEF pump will not function properly,
it can cause increased emissions in the exhaust system and reduced the
longevity of the filtration elements in the exhaust system. Thus, replace
faulty pump immediately.
- Fuel Injection – This system is responsible
for supplying fuel with certain pressure, thus assisting the fuel delivery
system and engine combustion process. Replace faulty/damaged injectors now!
- Engine Wiring Harness – Damaged, broken or corroded wiring can cause
the fuel delivery system to fail and the components to not work properly. These
are easier to check and replace. Purchase new wiring harness and replace the
faulty one.
Symptoms Of The OBD Error Code P20DB
Willing to know some common symptoms of OBD Trouble Code P20DB? Your wish is our demand. Have a look at them below:
Common Symptoms
- Decrease in the engine performance
- A lot of black smoke from vehicle exhaust
- There might be reduction in fuel efficiency
- Other EAS/SCR associated codes
How To Correct Exhaust Aftertreatment Fuel Supply Control Stuck Open Issue
If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P20DB:
- Repair or replace the quirky EAS fuel supply control circuit
- Rehabilitate the defaults in the EAS fuel supply control harness
- EAS fuel supply pump replacement
- Make sure to restore EAS fuel pressure sensor
- Circuit wiring and connector replacement
- EAS controller and PCM reprogramming should be done
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Easy Diagnosis Of Engine Error OBD Code P20DB
If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:
- Check for SCR controller and DEF related code error that might also get stored in the PCM along with this code, which can solve the problem easily.
- Inspect the air injector sensor and DEF pump area for any corrosion or leakages on the exterior and if found, suspect it to be failed.
- One will require tools like a diagnostic scanner, digital volt/ohmmeter, and automotive stethoscope.
- Connect the OBD scanner and retrieve the entire coded and freeze frame the data. After doing that test run the vehicle again under same circumstances to see if the code returns to make sure which codes are persistent (in case of more than one code).
- Check for damaged, broken and corroded wiring and connector to the sensor circuit and replace them, if required.
- Use the DVOM to test for voltage from the EAS fuel supply system grounds and check for fluctuations. If the readings are not under specified range, suspect for EAS fuel pump failure and replace it immediately.
- If everything seems to work fine, then check for faulty PCM and replace or reprogram as required.
Common Mistakes When Diagnosing The P20DB Code
- Some issues related to the exhaust aftertreatment fuel supply control circuit
- Failure in the powertrain control module
- Issues related to the wiring