Engine-Codes.com
Engine-Codes – Dodge – P20B8 Dodge

P20B8 Dodge Code - Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High

Quick Answer

The P20B8 diagnostic trouble code for Dodge vehicles indicates a problem with the Diesel Exhaust Fluid (DEF) Reductant Pump Heater Control Circuit being too high. Common causes include Faulty reductant pump heater, Wiring or connector issues in the control circuit, Corrosion or damage to the DEF system components. 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
P20B8 Dodge indicates Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High.
Common causes
Common causes include Faulty reductant pump heater, Wiring or connector issues in the control circuit, Corrosion or damage to the DEF system components.
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 09, 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 P20B8 Dodge Description

The P20B8 diagnostic trouble code for Dodge vehicles indicates a problem with the Diesel Exhaust Fluid (DEF) Reductant Pump Heater Control Circuit being too high. This system is a crucial part of the vehicle's emissions control system, specifically designed to reduce harmful nitrogen oxide emissions by injecting DEF into the exhaust stream. The reductant pump heater is responsible for maintaining the DEF fluid at the appropriate temperature to ensure proper operation. When this code is triggered, it means that the control circuit for the heater is experiencing a high voltage condition, which can lead to issues with DEF injection and ultimately affect the vehicle's emissions performance.

OBDII Code P20B8 Dodge - Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High
P20B8 Dodge Code - Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High

Common Causes of P20B8 Dodge

  1. Faulty reductant pump heater.
  2. Wiring or connector issues in the control circuit.
  3. Corrosion or damage to the DEF system components.
  4. Software or programming issues with the engine control module.
  5. Environmental factors affecting the DEF system, such as extreme temperatures.

Symptoms of P20B8 Dodge

  1. Check Engine Light illuminated.
  2. Reduced engine power or acceleration.
  3. Increased fuel consumption.
  4. Failed emissions testing.
  5. DEF system warning message on the dashboard.

How to Fix P20B8 Dodge

  1. Use a diagnostic scan tool to retrieve the trouble codes and pinpoint the exact cause of the high voltage condition.
  2. Inspect the reductant pump heater, wiring, and connectors for any signs of damage or corrosion.
  3. Test the resistance of the reductant pump heater to ensure it is within the manufacturer's specifications.
  4. Replace any faulty components, such as the reductant pump heater or damaged wiring, and clear the trouble codes from the vehicle's computer.
  5. Perform a DEF system reset and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P20B8 Dodge

The typical repair costs for addressing the P20B8 code on a Dodge vehicle can range from $200 to $600, depending on the specific cause of the issue and the cost of replacement parts. This estimate includes the cost of parts such as the reductant pump heater, wiring harness, and any necessary diagnostic testing. Keep in mind that labor rates at auto repair shops can vary widely, so it's advisable to check with local shops for a more precise estimate based on your location and vehicle model.

Need more information about the P20B8 Dodge code?

Need more information on how to fix the P20B8 Dodge code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P20B8 Dodge 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 P20B8 Dodge Code

1. What are common symptoms of OBDII code P20B8 in a Dodge related to the Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High?

The most common symptoms include the check engine light illuminating on the dashboard and potential reduced engine performance or efficiency.

2. What are the possible causes of OBDII code P20B8 in a Dodge related to the Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High?

Potential causes may include a faulty reductant pump heater, issues with the heater control circuit, electrical faults, or malfunctioning sensors.

3. Can I continue driving my Dodge with OBDII code P20B8 related to the Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage and potentially affect the vehicle's emissions system.

4. How can I diagnose OBDII code P20B8 in a Dodge related to the Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific fault codes, testing the reductant pump heater and related components, and inspecting the wiring and connectors for any issues.

5. Is it possible to repair OBDII code P20B8 in a Dodge related to the Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High myself?

While some experienced DIYers may be able to tackle this repair, it is recommended to seek professional help, especially when dealing with complex electrical components and emissions systems.

6. Are there any quick fixes or temporary solutions for OBDII code P20B8 related to the Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High?

There are generally no quick fixes for this code, as it often requires proper diagnosis and repair to address the underlying issue causing the high circuit reading.

7. How much does it typically cost to repair OBDII code P20B8 in a Dodge related to the Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High?

The cost of repair can vary depending on the specific cause of the code, but it may involve replacing the reductant pump heater, repairing wiring issues, or addressing other related components. Costs can range from a few hundred to over a thousand dollars.

8. Can a faulty reductant pump heater cause other problems in my Dodge besides triggering OBDII code P20B8?

Yes, a faulty reductant pump heater can potentially cause issues with the vehicle's emissions system, reduce fuel efficiency, and lead to poor engine performance if left unresolved.

9. How often should I check the Diesel Exhaust Fluid system in my Dodge to prevent issues like OBDII code P20B8?

It is recommended to follow the manufacturer's guidelines for regular maintenance and inspections of the Diesel Exhaust Fluid system to prevent issues like OBDII code P20B8 from occurring unexpectedly.

10. Is OBDII code P20B8 related to the Diesel Exhaust Fluid Reductant Pump Heater Control Circuit High a common issue in Dodge vehicles?

While it may not be as common as some other OBDII codes, issues related to the reductant pump heater control circuit can occur in Dodge vehicles, especially in models equipped with diesel engines and emissions control systems.

Discuss the causes and fixes for P20B8 Dodge OBDII Code

Submit a New Comment

Code P20B8 Dodge comments

No comments found for this page.