Guide To P202E OBD Error Code Solutions

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The P202E diagnostic error code is also known as the reductant injection valve circuit range/performance. The remaining exhaust particles is converted to harmless gases where the diesel exhaust fluid assists in conversion. The temperature of the exhaust system has to be high, in order to burn off these exhaust particles. When the DEF is injected into the exhaust stream, it will raise the diesel particulate filter up to the required temperature, where the harmful NOx is converted into nitrogen, carbon dioxide, and water. The P202E error will be set if the DEF injector malfunctions.

The P202E error code is known as reductant injector- circuit range/performance bank 1 unit 1. This error will be set in the vehicle if the PCM determines the voltage in the control circuit which is out of the predictable or suitable range. This error code generally means that reductant injector is poorly performing than expected and the injection is either less or too much, or the reductant is not being injected into the exhaust system due to the issues in the control circuit, as opposed which means that the injector has malfunctioned. Bank 1 signifies the reductant injector as well as it controls circuit on the exhaust system of the bank of cylinders which has the cylinder 1.

What causes this problem with the Reductant Injection Valve Circuit Range/Performance Bank 1 Unit 1?

• The wires or the electrical connectors of the reductant injector control circuit might be broken, separated, shorted or even eroded.
  
• Damaged reductant injector.
• The reductant temperature sensor might be faulty.
• The reductant temperature thermostat might be damaged at the location where it is fitted.
• Failure of the other control units or the PCM might be damaged. This is an extremely very rare case which is to be noted carefully and therefore the problem has to be sought elsewhere before changing any control unit.

1. Reductant injection valve - Check if the reductant injection valve is broken or damaged? If so replace them as soon as possible.
2. Diesel exhaust fluid - If the diesel exhaust fluid is poor, then the malfunctioning of the machine SCR’s system will take place. Replace it as soon as possible.
3. Exhaust system - If there is a loud roaring noise in the vehicle, then it’s high time to replace the faulty exhaust system and get rid of the P202E error code.
4. Diesel particulate filter - Does your engine fail to start? Does your engine find it very hard to start or accelerate? Then the DPF can be faulty. Change it quickly.
5. DEF Injector - The P202E error can be avoided if the defective DEF injector is immediately fixed by replacing it with a new one from PartsAvatar.
6. Powertrain control module - If the sensor circuit is shorted it will overload the engine and damage the PCM module. If you find the powertrain control module to be damaged get the replacement from Parts Avatar.
7. Engine wiring connector - The engine wiring connectors might get easily eroded if the temperature is high. Changing the damaged engine wiring connectors is very important so as to avoid the P202E error in the vehicle.
8. Exhaust pressure sensor – If there are any leaks or if the tube is clogged or blocked, then the exhaust pressure sensor can be defective. Replace it as quickly as possible.

If you are facing OBD error code P202E, then there are significant common symptoms that can be felt or observed. We have worked out a list here to help you out in understanding this problem better.

Common Symptoms

• Fuel efficiency is reduced.
• The vehicle exhaust will emit excessive black smoke
• The engine performance is lowered.
• Other trouble codes associated with SCR.

Here are some ways with the help of which you will be able to correct the OBD Code P202E:

• Fixing the broken or damaged wires and connectors of the reductant injector control circuit.
• Changing the damaged reductant injector.
• The reductant temperature sensor must be replaced.
• The defective reductant temperature thermostat must be altered.
• Replacing the broken PCM.

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have a high-grade valve, diesel exhaust fluid, exhaust system, filter, injector, powertrain control module, injector, wiring, exhaust pressure sensor.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P202E code to be stored:

• This is a general type of trouble code, where the mechanic will use a scanner to carefully look for any stored error code.
• He will then connect the scanner to the diagnostic port of the vehicle and recover all stored codes and freeze frame data as it can help him with further diagnosis.
• For this P202E error code, initially, the mechanic will carefully inspect the wires or the electrical connectors of the reductant injector control circuit.
• Any possible damage in this component has to be fixed immediately.
• As a next step, the mechanic will visually examine some of the components like the reductant injector, reductant temperature sensor and the reductant temperature thermostat for any possible damages or defects.
• These components will be replaced if they are found to be faulty.
• Finally, the mechanic will check for any possible faults in the powertrain control module and replace them quickly if there are damaged.
• After every of the diagnostic procedure is carefully done, the mechanic will reset the error code and then test drive the vehicle again.
• This will help him to know if the error code in the vehicle still occurs and also, helps him to locate the area as to where the fault occurred.

Common Mistakes When Diagnosing the P202E Code

• Malfunctioning of the DEF injector.
• The electrical wire faces some issue.
• The powertrain control module might be faulty.

P201A - Reductant Injection Valve Circuit Range/Performance Bank 2 Unit 1