Error Code P20D5: What It Means & What To Do?

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The prime symptom of the OBD code P20D5 is the increased emissions in the exhaust system. This not only increases pollutant emissions, but will also hamper the performance of the vehicle with affected utilization of the fuel delivery system. If the EAS fuel injector performance is out of bounds, OBD code P20D5 gets stored in the PCM.

OBD code P20D5 means Exhaust Aftertreatment Fuel Injector B Stuck Open Issue.

If your diesel powered vehicle has stored a code P20D5, it means that the powertrain control module (PCM) has detected no voltage in the control circuit for the exhaust aftertreatment fuel injector, designated B. The designation B indicates that multiple reductant injectors are in use.

What causes this problem with the Exhaust Aftertreatment Fuel Injector B Stuck Open?

• Damaged EAS fuel injector issue
• Open or shorted circuits in the EAS fuel injector control system
• Bad SCR controller/PCM or programming error

1. Engine Control Module – Most of the time it is difficult to intercept the ECM faults and thus must be checked for thoroughly. There can be a problem with the circuit or the software might have malfunctioned. Thus repair, replace or reprogram the component as per requirement.
2. Powertrain Control Module – If the PCM is faulty, it can stores wrong OBD codes and can lead to misdiagnosis. This can happen due to misinterpretation of data received from the various sensors and components which also affects the vehicle’s performance. Thus replace it immediately.
3. Diagnostic Tools – Use factory grade diagnostic tools to resolve OBD code P20D5 error. Buy new diagnostic tools and equipment for us.
4. Diesel Particulate Filter – The diesel particulate filter acts as an important component in managing the particulate emission in the exhaust system. If the filter is damaged, it may lead to increased emissions and pollutants through the tailpipe. Thus, replace damaged filter now!
5. Diesel Exhaust Fluid Heater – If the diesel exhaust fluid heater is faulty, it will not be able to aid in conversion of harmful nitrous oxide compounds to nitrogen, carbon dioxide and water vapours to control emissions. Thus, replace it immediately.
6. Exhaust System - Your exhaust system begins at the engine with the purpose of removing toxic gases and fumes from your vehicle. The components are a series of pipes, catalytic converters, sensors, mufflers, and often a resonator, as well as other emission devices. Thus, replace damaged exhaust system now!
7. Fuel Injection – Damaged, corroded, leaky or clogged fuel injector will restrict fuel entry into the chamber and thus cause lean condition, hampering the overall performance. Replace it now!

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P20D5 here:

Common Symptoms

• Reduction in fuel efficiency
• Excessive black smoke from vehicle exhaust
• Diminished engine performance
• Other SCR related codes

Want to correct the Trouble Code P20D5? Read these points mentioned below:

• Diesel Exhaust Fluid Heater replacement
• Diesel Particulate Filter replacement
• Exhaust System replacement
• Exhaust aftertreatment fuel injector replacement
• Faulty wiring and connector issue
• PCM repair and reprogramming

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of PCM, Diesel Exhaust Fluid, Exhaust Aftertreatment Fuel Injector, Fuel Injector, Diesel Particulate Filter, EAS, Ohmmeter, DEF injector and many more. Now all your problems would vanish within no time.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• Hook up a scan tool to the DLC port and check for any codes present.
• Note the codes and freeze frame data from all the codes.
• Clear the stored codes from the ECU.
• Perform a road test under similar conditions as the freeze frame data indicated.
• Check that the P20D5 is the code that has come back after the test drive.
• A visual inspection will be done looking for signs of exhaust leaks or damaged wiring for either the sensor itself of the harness.
• Inspect the EAS fuel injector for voltage output and replace, it any fault is found.
• Using a multimeter, the OHMs will be checked to the exhaust gas temperature sensor.
• The vehicle will be ran and the presence of exhaust leaks will be checked.

Common Mistakes When Diagnosing the P20D5 Code

• Faulty Powertrain Control Module (PCM)
• Failed DEF injection system
• Failed Reductant Injection control system
• Wiring harness and connector issue