Guide To P20CF OBD Error Code Solutions

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Check engine light flashing on? Don’t know the reason behind it? It could be due to the error code P20CF. Here’s all that you need to know about the error code P20CF. This OBD-II code powertrain control module (PCM) failure is also specified as a exhaust aftertreatment fuel injector A stuck open. The diesel exhaust fluid (DEF) aids greatly while converting the leftover exhaust particles to harmless gases. Therefore, to burn off those particles, an increased temperature is required in the exhaust system. The injection of DEF Fluid when put into the exhaust stream elevates the diesel particulate filter (DPF) up to temperature. Only then the system is able to perform the task of converting the toxic NOx to nitrogen, carbon dioxide and water. The code P20CF displays as soon as the DEF fails to function according to the requirements.

Positioned on the outlet of the turbocharger sub-assembly is the exhaust fuel addition injector assembly. The low pressure is transmitted to the exhaust fuel addition injector assembly through the feed pump located in the supply pump assembly. As the engine control

module sends a signal, fuel is added by the exhaust fuel addition injector assembly. This injector is further used for two distinct controls known as the particulate matter (PM) forced regeneration and PM reduction.

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

• Damaged exhaust aftertreatment fuel injector
• The harness in the exhaust aftertreatment fuel injector is disconnected or short circuited
• A deficient electrical connection running in the exhaust aftertreatment fuel injector circuit

1. Powertrain control module - It is because of a malfunction in the powertrain control module you will observe a fall in the overall performance of the system. Mend or restore your PCM now from Parts Avatar.
2. Diesel exhaust fluid pump - Get your error code fixed instantly with new diesel exhaust fluid pump in order to get rid of problems like potential damage to components, including DEF dosing pump and diesel particulate filter and malfunctions with the machine’s SCR system. Parts Avatar is just the right place that provides superior quality diesel exhaust fluid pump across the country.
3. Exhaust aftertreatment fuel injector - Are you noticing an increased fuel consumption? A fall in the overall operations of the engine? Yes, all that is triggered due to an erroneous exhaust aftertreatment fuel injector.
4. Fuel injector - Weary and defective fuel injectors can often be problematic. They can stimulate problems like failed emissions and rough engine performance. So to add some spark to your ride you definitely need the perfect quality fuel injectors offered at Parts Avatar. Isn’t that just the perfect deal?
5. Diesel particulate filter - Clogged diesel particulate filter? Well, it not only triggers the error code P20CF but also problems with the engine note change and an increased engine idle. Log into Parts Avatar if you want to get your diesel particulate filter changed or repaired.
6. Ohmmeter - For diagnosing the error code, one might need high grade diagnostic tools. Tune into Parts Avatar for your new ohmmeter, if you want to save your hard earned money being spent on unnecessary after repairs.
7. DEF injector - Facing the problems caused due to the error code P20CF? An inferior quality DEF injector can always be hazardous for the system also it is one of the primal causes behind the occurring of the error code P20CF. Apart from the error code, it also leads to problems like excessive smoke emission from the vehicle’ exhaust. Tune into Parts Avatar for supreme quality DEF injectors at economical prices.

Interested in knowing the symptoms to obd code P20CF? If yes, then you have arrived at the right place. We at PartsAvatar have listed out few common symptoms associated with this fuel injector problem.

Common Symptoms

• A significant fall in the engine performance
• Black smoke emitting from the vehicle exhaust
• Decreased fuel efficiency
• Various other codes related to EAS/SCR

Wish to correct this error code with your vehicle? Do you know what all you should do to make your car free from this code? Well, don’t worry! We are here to guide you:

• A damaged exhaust aftertreatment fuel injector should be repaired or replaced
• Measures should be taken to fix a bad electrical connection running in the exhaust aftertreatment fuel injector circuit
• The corroded or disconnected harness in the exhaust aftertreatment fuel injector should be mended or restored right away

Apart from the fuel injector, you might need to undergo few more replacements. You might need PCM, diesel exhaust fluid, exhaust aftertreatment fuel injector, fuel injector, diesel particulate filter, EAS, ohmmeter, DEF injector and many other parts. Where to get them from? Well, if you want quality parts, then we can prove to be your dream destination.

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

To start with, we advise you to use a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a source of vehicle specific diagnostic information to perform an accurate diagnosis of the code P20CF. It is essential to site a technical service bulletin (TSB) that collates the vehicle year, make/model along with the engine size, code/s stored, and symptoms exhibited. This proves to extremely helpful in extracting information while treating and diagnosing the error code P20CF. Next, a visual investigation should be performed of the EAS wiring harnesses and the connectors. All the wirings and connectors that are corroded or defective should be changed or repaired as per the requirements.

Continue by connecting the scanner into the vehicle diagnostic connector to restore all the stored codes and relevant freeze frame data. It is advised to register this information down before the codes are cleared. Perform a test drive of the vehicle till the PCM enters the readiness mode or the code reappears. If you observe the PCM entering the readiness mode, the code is an intermittent one (tougher to diagnose). It may require the conditions to worsen even before the actual treatment can be performed.

In case the code reappears, a vehicle information source to get the diagnostic flow charts, connector pin-out charts, connector face views, as well as component testing procedures and specifications will be required to proceed further. The vehicle information source should also be used to mark the exact location of the EAS fuel injector. The DVOM should be used to test the (voltage drop) power supply connecting the EAS control system. All the fuses should only be tested with the circuits loaded to avoid misdiagnosis. If you find the required power (battery voltage) and ground circuits are discovered, utilize the scanner to actuate the EAS fuel injector (solenoid) and probe output control circuit voltage.

Also, it should be noted that, if the voltage is not sufficient, a damaged controller (having a programming error) should be suspected. If the voltage falls within the parameters, the DVOM should be used to test the EAS fuel injector. A failed injector should be suspected if it fails to fall within the manufacturer’ specification. One should also be careful about the following: the EAS fuel injector is just a solenoid based injector that performs the function of spraying the reductant fluid into the exhaust and the ground circuits should be seen while the voltage drop testing.

Common Mistakes When Diagnosing the P20CF Code

Here we have listed a few common mistakes that should be avoided while performing the procedure:

• A defect in the DEF injector
• A malfunctioning powertrain control module (PCM)
• Wiring issues in the system