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Engine-Codes – Generic – P20FB

P20FB Code - Reductant Pump 2 Control Performance

Quick Answer

The P20FB code indicates an issue with the control performance of Reductant Pump 2 in the vehicle's Selective Catalytic Reduction (SCR) system. Common causes include Faulty Reductant Pump 2, Wiring issues or electrical faults, DEF contamination. 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
P20FB indicates Reductant Pump 2 Control Performance.
Common causes
Common causes include Faulty Reductant Pump 2, Wiring issues or electrical faults, DEF contamination.
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 07, 2024
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Code P20FB Description

The P20FB code indicates an issue with the control performance of Reductant Pump 2 in the vehicle's Selective Catalytic Reduction (SCR) system. The Reductant Pump 2 is responsible for supplying the necessary Diesel Exhaust Fluid (DEF) to the SCR system to reduce harmful emissions. When this pump fails to function properly, it can lead to decreased efficiency in emissions control, potentially causing the vehicle to exceed emission limits.

OBDII Code P20FB - Reductant Pump 2 Control Performance
P20FB Code - Reductant Pump 2 Control Performance

Common Causes of P20FB

  1. Faulty Reductant Pump 2
  2. Wiring issues or electrical faults
  3. DEF contamination
  4. Clogged DEF filter
  5. Software or calibration issues

Symptoms of P20FB

  1. Check engine light illuminated
  2. Reduced fuel efficiency
  3. Limp mode activation
  4. Engine misfires
  5. Increased emissions output

How to Fix P20FB

  1. Diagnose the issue by using a scan tool to read the code and determine the exact cause of the problem.
  2. Inspect the Reductant Pump 2 and associated wiring for any visible damage or corrosion.
  3. Test the pump's functionality by checking for power and ground signals and verifying proper fluid flow.
  4. Replace the Reductant Pump 2 if it is found to be faulty, ensuring it is properly calibrated and installed.
  5. Clear the code from the vehicle's memory and perform a test drive to ensure the issue has been resolved.

Cost to Fix P20FB

The cost to repair a Reductant Pump 2 Control Performance issue can vary depending on the specific cause of the problem and the vehicle's make and model. In general, replacing the Reductant Pump 2 itself can range from $200 to $500, with additional costs for labor and any necessary diagnostic tests. Overall, the total repair cost could range from $300 to $800 or more. It is recommended to consult with a qualified mechanic or repair shop for a more accurate estimate based on the individual circumstances of the vehicle.

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Code P20FB Information for Specific Makes

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.

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