P202F- OBD Trouble Code

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If you are looking for information with regards to the P202F error code, then you are at the right place. Keep reading further. This is a general wiring issue and is known as the reductant/regeneration supply control circuit range/ performance. The DEF helps in the conversion of the remaining exhaust particles into harmless gases. To burn off these particles, the exhaust system’s temperature has to be increased. As the DEF is injected into the exhaust stream, the DPF will raise the temperature as expected where the dangerous NOx is then converted into nitrogen, carbon dioxide, and water. The error code P202F will be set, if the DEF injector does not function properly.

The reduction of the exhaust emission is done by the catalyst system though there might be some applications which are well-equipped with NOx trap. The EGR systems will always go one step ahead and help in the reduction of NOx. But, today’s powerful and larger diesel engines fail to meet the strict federal US emission standards all alone along with the EGR, DPF/ catalytic converter and NOx. For one such scenario, SCR systems were started.

A reductant compound or DEF is inserted into the SCR system into the exhaust which is placed in front of the DPF, NOx trap or the catalytic converter through the reductant injection valve. The temperature of the filtration element will be raised by the correctly times DEF injection and it will allow it to work efficiently. This will improve the longevity of the filtration element and the exhaust emission which is sent into the atmosphere will be low. Either the PCM or the stand-alone controller which interrelates with the PCM is operated and controlled by the SCR system. Some way or the other, the O2, NOx and the exhaust temperature is monitored by the controller in order to find out the exact timing for the DEF injection. Accurate DEF injection is needed to preserve the exhaust temperature within the suitable parameters and improvise the pollutant filtration.

What causes this problem with the Reductant/Regeneration Supply Control Circuit Range/Performance?

• The reductant supply pump might be defective or it is overloaded.
• The reductant supply controls might have an open or shorted circuit.
• The SCR controller might be poor or there might be a programming error in the PCM.

1. Diesel particulate filter - If your DPF is faulty, it will send in too much fuel to the fuel mixture. Replacing the faulty DPF is one easy way to get rid of the P202F error code.
2. Powertrain control module - The engine will fail to start or the fuel economy will be poor if the powertrain control module is faulty. Get them replaced as soon as possible so that you can get rid of the P202F error code.
3. Engine Control Module - Malfunctioning of the engine control module can arise due to power relay or voltage issues. Changing the defective engine control module can help you to get rid of the P202F error in your vehicle.
4. Exhaust gas recirculation - One of the common symptoms for a faulty EGR is a rough idle. Replacing the damaged EGR can help you to avoid the P202F error code from getting stored.
5. Catalytic converter - One common reason for a damaged catalytic converter is the misfiring of the spark plug. Replace the defective catalytic converter with a new one from PartsAvatar to avoid the P202F error code.

Interested in knowing the symptoms to OBD code P202F? 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:

• Fuel efficiency is lowered.
• You will see more black smoke from the exhaust of the vehicle.
• The engine performance is diminished.
• Diagnostic trouble codes relating to SCR.

After you know the symptoms of your vehicle’s problem, it becomes easy to detect it and get started with solving it. So, next on our list is a few common steps to correct this issue with your vehicle’s.

• The defective reductant supply pump must be fixed.
• The reductant supply control might have an open or shorted circuit which has to be repaired.
• The faulty SCR controller/PCM must be replaced.

If you need any parts to fix this problem you can easily find them with us. Not only that we also have in stock the best in range auto parts and that too at the most budget-friendly prices ever online. Whether you need a diesel particulate filter, filter, powertrain control module, control, ECM, EGR, catalytic converter, oil control pressure, you can simply rely on us for quality auto parts.

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

• The ECM/PCM along with the engine system will initiate the P202F code solenoid valve so as to control the oil pressure to the engine mechanism that is fixed in the valve system to change the valve timing between high and low.
• If there is an open or short circuit in the engine solenoid valve, a DTC will be stored in the vehicle.

      Step 1

• As a very first step, you have to test the reductant tank supply pump with the help of a DVOM as per the manufacturer’s specification.
• You have to consider the components to be defective which does not test within the extremely acceptable parameters.

      Step 2

• With the help of a vehicle source diagnostic information and DVOM, the voltage of the reductant supply pump has to be tested which is usually a battery voltage while the pump is initiated.
• The scanners can be used to manually start the pump if the present situation does not permit activation.

      Step 3

• If the reductant supply pump is properly working, then the input and output signal circuit from the fuse panel, PCM and ignition switch has to be tested with the help of a DVOM.
• Before you test with the help of a DVOM, every controller has to be separated.

Common Mistakes When Diagnosing the P202F Code

• Defective DEF injector.
• The wires might cause trouble if they are damaged.
• Problematic powertrain control module.