Engine-Codes.com
Engine-Codes – Generic – P20D8

P20D8 Code - Exhaust Aftertreatment Fuel Supply Control Performance

Quick Answer

The P20D8 diagnostic trouble code (DTC) indicates a problem with the exhaust aftertreatment fuel supply control performance. Common causes include Faulty fuel supply control module, Clogged DEF injector, Wiring or electrical issues. 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
P20D8 indicates Exhaust Aftertreatment Fuel Supply Control Performance.
Common causes
Common causes include Faulty fuel supply control module, Clogged DEF injector, Wiring or electrical issues.
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 08, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P20D8 Description

The P20D8 diagnostic trouble code (DTC) indicates a problem with the exhaust aftertreatment fuel supply control performance. This code is typically found in diesel vehicles that are equipped with a selective catalytic reduction (SCR) system, which is responsible for reducing harmful nitrogen oxide emissions. When this code is triggered, it means that the vehicle's onboard computer has detected an issue with the fuel supply control system for the exhaust aftertreatment system.

OBDII Code P20D8 - Exhaust Aftertreatment Fuel Supply Control Performance
P20D8 Code - Exhaust Aftertreatment Fuel Supply Control Performance

Common Causes of P20D8

  1. Faulty fuel supply control module
  2. Clogged DEF injector
  3. Wiring or electrical issues
  4. Low DEF fluid level
  5. Contaminated DEF fluid

Symptoms of P20D8

  1. Check engine light illuminated
  2. Reduced engine performance or power
  3. Increased fuel consumption
  4. Poor acceleration or throttle response
  5. Smoke or unusual exhaust odor

How to Fix P20D8

  1. Perform a diagnostic scan to confirm the P20D8 code and identify the specific underlying issue.
  2. Inspect the fuel supply control module and wiring for any damage or corrosion. Repair or replace as necessary.
  3. Check the DEF injector for clogs or leaks. Clean or replace the injector if needed.
  4. Verify the DEF fluid level and quality. Top up the fluid or flush and refill if contaminated.
  5. Clear the DTC and reset the vehicle's onboard computer to see if the issue has been resolved.

Cost to Fix P20D8

The typical repair costs for addressing a P20D8 code can vary depending on the specific cause of the issue. In general, the cost of parts for this repair can range from $100 to $500, with labor costs adding another $100 to $300. Keep in mind that labor rates can vary between different auto repair shops, so it's recommended to obtain quotes from multiple sources to ensure a fair price. Additionally, the cost of DEF fluid may also need to be factored into the overall repair cost.

Need more information about the P20D8 code?

Need more information on how to fix the P20D8 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P20D8 code diagnosed by a professional: Find a repair shop in your area

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 P20D8 Code

No Frequently Asked Questions about P20D8 Code found.

Discuss the causes and fixes for P20D8 OBDII Code

Submit a New Comment