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Engine-Codes – Generic – P20EB

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

Quick Answer

The code P20EB indicates that the Reductant Control Module Power Relay De-Energized Performance Too Late. Common causes include Faulty Power Relay: A malfunctioning power relay that controls the reductant system can trigger this code, Wiring Issues: Any issues with the wiring connected to the power relay or reductant control module can cause this code to appear, Software Glitch: A software glitch in the vehicle's onboard computer system may lead to the delayed performance of the power relay. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P20EB indicates Reductant Control Module Power Relay De-Energized Performance Too Late.
Common causes
Common causes include Faulty Power Relay: A malfunctioning power relay that controls the reductant system can trigger this code, Wiring Issues: Any issues with the wiring connected to the power relay or reductant control module can cause this code to appear, Software Glitch: A software glitch in the vehicle's onboard computer system may lead to the delayed performance of the power relay.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P20EB Description

The code P20EB indicates that the Reductant Control Module Power Relay De-Energized Performance Too Late. This means that there is an issue with the power relay that controls the reductant system in the vehicle. The reductant system is responsible for reducing harmful emissions by injecting a urea-based solution into the exhaust stream to convert nitrogen oxides into nitrogen and water.

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

Common Causes of P20EB

  1. Faulty Power Relay: A malfunctioning power relay that controls the reductant system can trigger this code.
  2. Wiring Issues: Any issues with the wiring connected to the power relay or reductant control module can cause this code to appear.
  3. Software Glitch: A software glitch in the vehicle's onboard computer system may lead to the delayed performance of the power relay.
  4. Defective Reductant Control Module: If the reductant control module itself is defective, it can cause issues with the power relay.

Symptoms of P20EB

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Reduced Fuel Efficiency: The vehicle may experience decreased fuel efficiency due to the reductant system not functioning properly.
  3. Increased Emissions: The vehicle may emit higher levels of harmful pollutants due to the reductant system not operating efficiently.
  4. Poor Performance: The vehicle may exhibit poor acceleration or overall performance as a result of the issue with the reductant control module.

How to Fix P20EB

  1. Diagnose the Issue: Use a diagnostic scanner to read the fault codes and pinpoint the exact cause of the problem.
  2. Inspect Power Relay and Wiring: Check the power relay and associated wiring for any signs of damage or corrosion. Replace any faulty components.
  3. Test Reductant Control Module: Test the reductant control module to ensure it is functioning correctly. Replace if necessary.
  4. Clear Fault Codes: After making the necessary repairs, clear the fault codes from the vehicle's computer system to reset the check engine light.
  5. Test Drive: Take the vehicle for a test drive to ensure that the issue has been resolved and that the reductant system is functioning properly.

Cost to Fix P20EB

The cost of repairing the Reductant Control Module Power Relay De-Energized Performance Too Late code can vary depending on the specific cause of the issue and the make and model of the vehicle. In general, the cost of parts for this repair can range from $100 to $300, while labor costs can range from $100 to $200. This means that the total cost of the repair can be anywhere from $200 to $500. It is important to note that these are rough estimates, and actual costs may vary based on location and other factors. It is recommended to consult with a professional mechanic for a more accurate cost estimate.

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Code P20EB Information for Specific Makes

  • P20EB Ford — Reductant Control Module Power Relay De-Energized Performance Too Late
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P20EB Code

1. What are the common symptoms of OBDII code P20EB?

- Common symptoms include reduced engine performance, poor fuel efficiency, and the illumination of the check engine light.

2. What could cause the OBDII code P20EB to trigger?

- The code may be triggered by a faulty reductant control module power relay, issues with the reductant control module power supply, or wiring problems.

3. How serious is the OBDII code P20EB?

- While the code itself may not cause immediate harm to the vehicle, it can lead to decreased engine performance and increased emissions if left unresolved.

4. Can I continue driving my vehicle with the OBDII code P20EB?

- It is generally not recommended to continue driving the vehicle with this code present, as it can affect fuel efficiency and overall engine performance.

5. How can I diagnose the OBDII code P20EB?

- Diagnosing this code typically involves using a scan tool to retrieve the code, checking for any other related codes, and conducting a thorough inspection of the reductant control module and associated components.

6. What are some possible repair tips for OBDII code P20EB?

- Repair tips may include checking and replacing the reductant control module power relay, inspecting the wiring for any damage, and ensuring proper power supply to the module.

7. Can I reset the OBDII code P20EB myself?

- While you can clear the code using a scan tool, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

8. How much does it typically cost to repair the OBDII code P20EB?

- Repair costs can vary depending on the specific cause of the code, but they may range from $100 to $500 for parts and labor.

9. Will the OBDII code P20EB cause my vehicle to fail an emissions test?

- Yes, if the issue triggering the code is not resolved, it can lead to increased emissions and potentially cause the vehicle to fail an emissions test.

10. Is there any preventative maintenance to avoid OBDII code P20EB?

- Regularly inspecting and maintaining the reductant control module, power relay, and associated wiring can help prevent issues that may trigger this code.

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