P20EA OBD Error Code: Problem & Solutions

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The trouble code P20EA can be elucidated as Reductant Control Module Power Relay De-Energized Performance Too Early Issue. This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made from 1996 up to present. It’s also more common among Audi, Citroen, Chevrolet, Ford, Hyundai, Nissan, Peugeot, and Volkswagen vehicles. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model, powertrain configuration type, to another. This trouble code indicates that there is an issue with the reductant control power relay.

The reductant delivery system includes a pump which pumps reductant from a tank an injector which injects reductant into the exhaust gas, and a heater for heating the reductant in the tank. A control system includes an ECU which controls the pump, the injector and the heater as a function of sensed temperatures.

The battery voltage the applied to the appropriate PCM circuits with the help of the power relay. This type of relay is a contact type that activates with a signal wire from the ignition switch. To avoid voltage spikes and possible controller damage, the relay must gradually de-energized. Of the power relay to the reductant control module de-energizes too quickly, OBD code P20EA gets stores in the system.

What causes this problem with the ECM/PCM Power Relay De-Energized Performance - Too Early?

• Damaged Reductant Control Module Power Relay
• Faulty wiring and harness to Reductant Control Module Power Relay
• Poor connection to the Reductant Control Module Power Relay circuit

1. Engine Control Module - It is not always the components, but the ECM that can also be faulty. It can cause misinterpretation of correct data thus leading to wrong operational decisions which will affect the transmission and overall engine performance. Thus, replace faulty module and reprogram it now!
2. Powertrain Control Module - Powertrain Control Module can also be faulty in rare cases and thus needs through checks for system and software errors. Thus, check and replace it, if required.
3. Diagnostic Tool - It is always advisable to use correct tools and equipment while resolving any OBD code issue as even small mistakes can lead to wrong diagnosis. Thus, always take help from a professional who has the knowledge and experience to such tools in efficient manner. Buy new quality diagnostic tools from us today!
4. Electronic Control Unit – ECU monitors the temperature differences in the boost converter with the help of the temperature sensors to prevent the converter from overheating and malfunctioning. Thus, replace faulty ECU immediately.
5. Exhaust Gas Recirculation Valve - Did you just see check engine light flashing on your dashboard? If the computer would detect some fault with the automobile’s EGR valve circuit, then it would set up the check engine light so that the driver is notified about the fault. Don’t waste time and get them replaced or else this fault code can turn up.
6. Diesel Exhaust Fluid Pump - The diesel exhaust fluid pump needs to work properly if the transmission system has to perform. If it is not functioning, the transmission may slip and cause harsh shifts too. Thus, replace faulty pump now and buy a new one from us!

If you are facing OBD error code P20EA, 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

• Check engine light can start flashing up
• Sometimes there might be no visible symptoms present
• DEF function regeneration

Want to correct the Trouble Code P20EA? Read these points mentioned below:

• Repair or replace the loose, broken or corroded wiring
• Rehabilitate the defaults in the reduction pump circuit
• You must fix the defective or corroded connectors
• Make sure to mend the faulty exhaust system parts
• Replacement of the Reductant control module
• Power relay replacement
• Carefully adjust the faults in the exhaust gas temperature sensor (EGTS)
• Recondition the non-functioning terminals

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Do you wish to diagnose P20EA error code easily? Here are some steps which you should follow in order to diagnose this fault code:

• Initial step is to visually examine the wiring for faults, frays, or wires that have melted.
• Visually inspect the connector for damage, frays, or corrosion. Make sure to mend the defective wiring or connectors as per the requirement.
• The mechanic should retest the system to make sure that the wiring and connectors are in good working condition.
• The mechanic or the technician will use a diagnostic scanner or code reader like DVOM to visually scan for the error codes in the vehicle.
• After performing a careful inspection, every of the stored codes and freeze frame data are retrieved as it can help down the way for further diagnosis process.
• He will know that an intermittent condition persist, if the code does not return instantly.
• Intermittent conditions are very tough to diagnose, and they need time to get worse before they can be diagnosed correctly.
• Check the circuitry of the exhaust gas temperature sensor EGTS)/exhaust gas pressure sensor (EGPS) near where the hot exhaust constituents are close to wiring and connectors.
• Rehabilitate the defaults in the circuitry. The entire system should be retested to make sure that the circuitry of the exhaust gas temperature sensor and pressure sensor are in good working condition.
• After that it is essential to examine the resistance of the EGTS/EGPS. The specifications of the resistance are decided by the manufacturer, but are typically 150 ohms. A resistance reading of below 50 ohms would indicate that there is need to replace the defective sensor.
• A heating component should be used to examine the resistance with the volt/ohmmeter. The level of the resistance would decline when the heating component is added and would rise when the sensor would cool.
• If this would not happen, then it would indicate that there is a need to restore the faulty EGTS/ EGPS.
• The voltage of the EGTS /EGPS, at the electrical connector should be checked properly. Keep in mind that the reading of the voltage should be at 5-volts.
• Now if the voltage reading of the EGTS/EGPS would not be at 5-volts, then you should inspect the continuity between the PCM and the signal wire.
• There would be a need to replace or reprogram the PCM if there is continuity.
• There might be some flaws in the reductant injection air controller if no voltage is present on the sensor connector.
• If the mechanic finds out that there is no voltage present in the sensor connector, then it would that there are some quirks in it. Reprogram the defective reductant injection air controller.
• Check for the proper functioning if the power control module and the power relay that might need replacement and reprogramming.
• The P20EA trouble code would start appearing due to problematic reductant pump circuit that might need immediate repair or replacement. Thus, optimal replacements are in order.

Common Mistakes When Diagnosing the P20EA Code

• Reductant control module power relay damaged
• PCM/ECM faults
• Most mechanics simply neglect to examine the wiring, connectors and terminals for damage

P20EB - Reductant Control Module Power Relay De-Energized Performance - Too Late