AutoCodes – Generic – P20FC

P20FC Code - Reductant Pump 2 Control Circuit Low

Quick Answer

The Powertrain Control Module (PCM) monitors the Diesel Exhaust Fluid (DEF) pressure buildup system to provide correct (overall) performance. Common causes include Faulty Diesel Exhaust Fluid (DEF) Pump, Diesel Exhaust Fluid Pump harness is open or shorted, Diesel Exhaust Fluid Pump circuit poor electrical connection. 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: P20FC indicates Reductant Pump 2 Control Circuit Low.
Common causes: Common causes include Faulty Diesel Exhaust Fluid (DEF) Pump, Diesel Exhaust Fluid Pump harness is open or shorted, Diesel Exhaust Fluid Pump circuit poor electrical connection.
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.

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Code Popularity 2,020

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 18, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P20FC Description

The Powertrain Control Module (PCM) monitors the Diesel Exhaust Fluid (DEF) pressure buildup system to provide correct (overall) performance. If excessive air is detected during pressure buildup, the Purge Pump system draws fluid back into the DEF tank to remove the air. Once the purge is complete the pressure buildup is reinitialized. The Diagnostic Trouble Code (DTC) will be set when the PCM detects less than 3.0 Volts on the DEF Supply Pump Control circuit for 2.0 seconds. This is a two Trip Fault.

OBDII Code P20FC - Reductant Pump 2 Control Circuit Low - AutoCodes.com — P20FC Code - Reductant Pump 2 Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC P20FC?

Faulty Diesel Exhaust Fluid (DEF) Pump
Diesel Exhaust Fluid Pump harness is open or shorted
Diesel Exhaust Fluid Pump circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P20FC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P20FC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P20FC code?

Need more information on how to fix the P20FC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P20FC code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P20FC Dodge — Reductant Pump 2 Control Circuit Low
P20FC RAM — Reductant Pump 2 Control Circuit Low

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 P20FC Code

1. What are the common symptoms of OBDII code P20FC (Reductant Pump 2 Control Circuit Low)?

- Common symptoms include illuminated check engine light, reduced engine performance, and potential failure to pass emissions testing.

2. What are the possible causes of OBDII code P20FC?

- Possible causes include a faulty reductant pump 2, damaged wiring or connectors in the control circuit, or a malfunctioning powertrain control module (PCM).

3. How can I diagnose the root cause of OBDII code P20FC?

- Diagnose the code by using a scan tool to retrieve the specific fault code, inspecting the reductant pump 2 and its wiring for damage, and testing the control circuit components for proper functionality.

4. Can I continue driving with OBDII code P20FC present?

- It is not recommended to drive with the code present, as it can lead to reduced engine performance and potential damage to the emissions control system.

5. How can I repair OBDII code P20FC?

- Repair options include replacing the faulty reductant pump 2, repairing damaged wiring or connectors in the control circuit, or reprogramming the PCM if necessary.

6. Will resetting the code make it go away permanently?

- Resetting the code without addressing the underlying issue will not make it go away permanently. The root cause must be diagnosed and repaired to prevent the code from returning.

7. Can a DIY enthusiast fix OBDII code P20FC at home?

- Depending on the skill level and access to tools, a DIY enthusiast may be able to diagnose and repair OBDII code P20FC at home. However, complex issues may require professional assistance.

8. How much does it typically cost to repair OBDII code P20FC?

- The cost of repairing OBDII code P20FC can vary depending on the root cause and the labor rates of the repair shop. Costs may include parts, labor, and diagnostic fees.

9. Is OBDII code P20FC a common issue in certain car models?

- OBDII code P20FC related to the reductant pump 2 control circuit low is more commonly found in vehicles equipped with diesel engines and Selective Catalytic Reduction (SCR) systems.

10. How can I prevent OBDII code P20FC from occurring in the future?

- To prevent OBDII code P20FC, it is important to perform regular maintenance on the emissions control system, avoid rough driving conditions, and address any warning lights or symptoms promptly.