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Engine-Codes – Generic – P20FD

P20FD Code - Reductant Pump 2 Control Circuit Low

Quick Answer

The diagnostic trouble code P20FD indicates a problem with the reductant pump 2 control circuit being low. Common causes include Faulty reductant pump 2, Wiring issues in the control circuit, Corrosion or damage to electrical connectors. 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
P20FD indicates Reductant Pump 2 Control Circuit Low.
Common causes
Common causes include Faulty reductant pump 2, Wiring issues in the control circuit, Corrosion or damage to electrical connectors.
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 18, 2024
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Code P20FD Description

The diagnostic trouble code P20FD indicates a problem with the reductant pump 2 control circuit being low. The reductant pump is a crucial component of the Selective Catalytic Reduction (SCR) system in diesel vehicles. The SCR system helps reduce harmful emissions by injecting a urea-based solution (DEF - Diesel Exhaust Fluid) into the exhaust stream, which reacts with harmful nitrogen oxides (NOx) to convert them into harmless nitrogen and water vapor.

OBDII Code P20FD - Reductant Pump 2 Control Circuit Low
P20FD Code - Reductant Pump 2 Control Circuit Low

Common Causes of P20FD

  1. Faulty reductant pump 2
  2. Wiring issues in the control circuit
  3. Corrosion or damage to electrical connectors
  4. Issues with the vehicle's onboard computer
  5. Low DEF fluid levels

Symptoms of P20FD

  1. Check Engine Light illuminated
  2. Reduced engine power
  3. Increased emissions
  4. Failed emissions test
  5. Poor fuel efficiency

How to Fix P20FD

  1. Begin by conducting a visual inspection of the reductant pump 2 and its wiring harness to check for any obvious signs of damage or corrosion.
  2. Use a multimeter to test the electrical connections and wiring to ensure proper voltage is reaching the pump.
  3. If the wiring and connections are in good condition, the reductant pump 2 may need to be replaced.
  4. Clear the diagnostic trouble codes from the vehicle's computer using a scan tool and test drive the vehicle to ensure the issue has been resolved.
  5. Refill the DEF tank with a fresh supply of Diesel Exhaust Fluid to ensure proper operation of the SCR system.

Cost to Fix P20FD

The cost of repairing a P20FD code can vary depending on the specific cause of the issue. In general, replacing a faulty reductant pump 2 can cost between $200 and $500, including parts and labor. However, additional costs may be incurred if wiring repairs or other components need to be replaced. It is recommended to consult with a qualified mechanic or dealership to get an accurate estimate based on the vehicle's make and model. Labor rates at auto repair shops typically range from $80 to $150 per hour, but can vary based on location and other factors.

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Code P20FD 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.

Frequently Asked Questions about P20FD Code

1. What does the OBDII code P20FD mean?

P20FD indicates a problem in the reductant pump 2 control circuit, specifically a low voltage or signal issue.

2. What are the common symptoms of a P20FD code?

Symptoms may include the check engine light, reduced engine performance, increased emissions, or issues with the diesel exhaust fluid (DEF) system.

3. What causes the P20FD code to appear?

Common causes include a faulty reductant pump, damaged wiring or connectors in the control circuit, a failed control module, or low DEF levels.

4. Can I drive with a P20FD code?

Driving with this code is possible but not recommended, as it can lead to increased emissions and potentially cause further damage to the DEF system.

5. How do I diagnose a P20FD code?

Diagnosis involves scanning for codes, inspecting the reductant pump and wiring for damage, testing the circuit for proper voltage, and checking DEF levels.

6. How can I fix the P20FD code?

Repairs may include replacing the reductant pump, repairing or replacing damaged wiring or connectors, and ensuring proper DEF levels.

7. Does the P20FD code mean my DEF pump is faulty?

Not always. The issue could be with the wiring, connectors, or control circuit rather than the pump itself.

8. How much does it cost to fix a P20FD code?

Repair costs vary but can range from $100 to $1,000, depending on whether the issue is with wiring, the pump, or other components.

9. Can low DEF levels trigger the P20FD code?

Yes, insufficient DEF levels can sometimes trigger this code, as the pump may not function properly without enough fluid.

10. Will clearing the code fix a P20FD issue?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.

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