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P20FB RAM Code - Reductant Pump 2 Control Performance

Quick Answer

The P20FB diagnostic trouble code (DTC) indicates a problem with the Reductant Pump 2 Control Performance in the vehicle's selective catalytic reduction (SCR) system. Common causes include Faulty Reductant Pump 2: The pump itself may be defective and not supplying DEF to the SCR catalyst, Wiring Issues: Damaged or corroded wiring connections can prevent the proper operation of the Reductant Pump 2, Control Module Malfunction: A malfunctioning control module that controls the Reductant Pump 2 operation can trigger this code. 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 RAM indicates Reductant Pump 2 Control Performance.
Common causes
Common causes include Faulty Reductant Pump 2: The pump itself may be defective and not supplying DEF to the SCR catalyst, Wiring Issues: Damaged or corroded wiring connections can prevent the proper operation of the Reductant Pump 2, Control Module Malfunction: A malfunctioning control module that controls the Reductant Pump 2 operation can trigger this code.
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 06, 2024
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Code P20FB RAM Description

The P20FB diagnostic trouble code (DTC) indicates a problem with the Reductant Pump 2 Control Performance in the vehicle's selective catalytic reduction (SCR) system. The SCR system is responsible for reducing harmful emissions in diesel engines by injecting a urea-based fluid called diesel exhaust fluid (DEF) into the exhaust stream. The Reductant Pump 2 is a crucial component of this system as it is responsible for supplying the DEF to the SCR catalyst.

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

Common Causes of P20FB RAM

  1. Faulty Reductant Pump 2: The pump itself may be defective and not supplying DEF to the SCR catalyst.
  2. Wiring Issues: Damaged or corroded wiring connections can prevent the proper operation of the Reductant Pump 2.
  3. Control Module Malfunction: A malfunctioning control module that controls the Reductant Pump 2 operation can trigger this code.
  4. DEF Fluid Contamination: Contaminated or low-quality DEF fluid can cause issues with the SCR system.

Symptoms of P20FB RAM

  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: A malfunctioning Reductant Pump 2 can lead to decreased fuel efficiency as the vehicle's emissions control system may not be operating optimally.
  3. Limp Mode: In some cases, the vehicle may go into a reduced power or limp mode to prevent damage to the engine.
  4. Failed Emissions Test: If the SCR system is not functioning correctly, the vehicle may fail emissions testing.

How to Fix P20FB RAM

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific DTC and pinpoint the exact cause of the problem.
  2. Inspect Wiring and Connections: Check the wiring and connections to ensure there are no damages or corrosion that could be affecting the Reductant Pump 2 operation.
  3. Test Reductant Pump 2: Test the functionality of the Reductant Pump 2 to determine if it is the source of the issue.
  4. Replace Reductant Pump 2: If the pump is found to be faulty, replace it with a new unit to restore proper function to the SCR system.
  5. Clear Codes and Test Drive: After completing the repair, clear the DTCs from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P20FB RAM

The typical repair costs for addressing a P20FB DTC related to the Reductant Pump 2 Control Performance can vary depending on the specific cause of the issue. On average, the cost of replacing a faulty Reductant Pump 2 can range from $200 to $600, including parts and labor. However, additional costs may be incurred if wiring repairs or control module replacement is necessary. It is important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. As such, it is recommended to obtain a detailed quote from a trusted mechanic or dealership to get a more accurate estimate for this repair.

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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 P20FB RAM Code

1. What does the OBDII code P20FB mean on a RAM vehicle?

P20FB indicates an issue with the performance of the Reductant Pump 2 Control, which is a component of the diesel exhaust fluid (DEF) system responsible for reducing emissions.

2. What are common symptoms of the P20FB code on a RAM truck?

Symptoms may include a check engine light, DEF system warnings, reduced engine performance, or the vehicle entering limp mode.

3. What causes the P20FB code to appear?

Common causes include a faulty reductant pump, electrical issues like damaged wiring or connectors, a malfunctioning control module, or contamination in the DEF system.

4. Can I drive my RAM truck with the P20FB code active?

Driving with the P20FB code is not recommended, as it may lead to reduced engine performance or emissions system failures. Addressing the issue promptly helps avoid further damage.

5. How do I diagnose the P20FB code on my RAM vehicle?

Diagnosis typically involves using an OBDII scanner to confirm the code, visually inspecting the reductant pump and wiring, checking for module communication errors, and testing the pump's electrical performance.

6. How can I fix the P20FB code on a RAM truck?

Repairs may involve replacing the reductant pump, repairing damaged wiring or connectors, cleaning the DEF system, or reprogramming or replacing the control module.

7. Is the P20FB code covered under warranty on RAM trucks?

This depends on your specific vehicle's warranty terms. Emissions-related components may be covered under federal emissions warranties. Check with your dealer for details.

8. What is the Reductant Pump 2 in the DEF system?

The Reductant Pump 2 is responsible for delivering DEF fluid to the selective catalytic reduction (SCR) system, which reduces nitrogen oxide (NOx) emissions.

9. Can a contaminated DEF tank trigger the P20FB code?

Yes, contamination in the DEF tank can lead to pump or injector malfunctions, which may trigger the P20FB code.

10. What tools are needed to troubleshoot the P20FB code?

You'll need an OBDII scanner, a multimeter to test electrical connections, and possibly diagnostic software specific to RAM vehicles to assess the reductant system.

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