AutoCodes – Generic – P20F5

P20F5 Code - Reductant Consumption Too High

Quick Answer

The Powertrain Control Module (PCM) monitors the Diesel Exhaust Fluid (DEF) consumption by comparing the DEF pressure in the supply line to the known DEF Supply Pump volume. Common causes include Diesel Exhaust Fluid (DEF) Pressure Line Damage or Fittings Restricted, Faulty DEF Supply Pump Assembly. 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: P20F5 indicates Reductant Consumption Too High.
Common causes: Common causes include Diesel Exhaust Fluid (DEF) Pressure Line Damage or Fittings Restricted, Faulty DEF Supply Pump Assembly.
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 24,130

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 P20F5 Description

The Powertrain Control Module (PCM) monitors the Diesel Exhaust Fluid (DEF) consumption by comparing the DEF pressure in the supply line to the known DEF Supply Pump volume. This rationality comparison will detect DEF consumption high or low failures. The PCM will illuminate the MIL light immediately after the diagnostics runs and fails. The DEF injection into the aftertreatment system will be disabled.

OBDII Code P20F5 - Reductant Consumption Too High - AutoCodes.com — P20F5 Code - Reductant Consumption Too High

What does this mean?

What are the Possible Causes of the DTC P20F5?

Diesel Exhaust Fluid (DEF) Pressure Line Damage or Fittings Restricted
Faulty DEF Supply Pump Assembly

How to Fix the DTC P20F5?

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 P20F5 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 P20F5 code?

Need more information on how to fix the P20F5 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P20F5 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P20F5 Dodge — Reductant Consumption Too High
P20F5 RAM — Reductant Consumption Too High

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 P20F5 Code

1. What are the common symptoms of OBDII code P20F5 (Reductant Consumption Too High)?

- The common symptoms include the check engine light being illuminated, reduced engine performance, and potential issues with the vehicle's emission system.

2. What can cause the OBDII code P20F5 to trigger?

- This code can be triggered by issues such as a malfunctioning reductant control module, a faulty reductant pump, or a leak in the reductant system.

3. How serious is the OBDII code P20F5?

- While the code itself may not cause immediate harm to the vehicle, it can lead to increased emissions and potential compliance issues with emission standards.

4. What are some repair tips for addressing the OBDII code P20F5?

- Repair tips may include checking for leaks in the reductant system, inspecting the reductant pump and control module, and resetting the code after repairs are made.

5. Can I continue driving my vehicle with the OBDII code P20F5?

- It is not recommended to continue driving the vehicle with this code as it may lead to increased emissions and potential long-term damage to the emission control system.

6. How can I diagnose the OBDII code P20F5?

- Diagnosing this code typically involves using a professional OBDII scanner to read the code, inspecting the reductant system components, and performing necessary tests to identify the root cause.

7. Are there any common mistakes to avoid when dealing with the OBDII code P20F5?

- Common mistakes to avoid include ignoring the code for an extended period, attempting to reset the code without addressing the underlying issue, and neglecting regular maintenance of the emission system.

8. Is it possible to prevent the OBDII code P20F5 from occurring?

- Regular maintenance of the emission system, timely repairs of any related issues, and using high-quality reductant fluid can help prevent the code from occurring.

9. Can a DIY enthusiast repair the OBDII code P20F5 at home?

- While some basic inspections and maintenance tasks can be performed at home, diagnosing and repairing the root cause of the code may require professional expertise and specialized tools.

10. How much does it typically cost to repair the OBDII code P20F5?

- The cost of repairing this code can vary depending on the underlying issue, the extent of repairs needed, and the labor rates of the service provider. It is advisable to obtain multiple quotes for an accurate estimate.