Engine-CodesRAM – P208B RAM

P208B RAM Code - Diesel Exhaust Fluid Reductant Pump Range/Performance

Quick Answer

The P208B code refers to a Diesel Exhaust Fluid (DEF) Reductant Pump Range/Performance issue. Common causes include Faulty reductant pump, Clogged DEF lines, DEF contamination. 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
P208B RAM indicates Diesel Exhaust Fluid Reductant Pump Range/Performance.
Common causes
Common causes include Faulty reductant pump, Clogged DEF lines, DEF contamination.
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.
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P208B RAM Description

The P208B code refers to a Diesel Exhaust Fluid (DEF) Reductant Pump Range/Performance issue. The reductant pump is responsible for supplying the DEF fluid to the exhaust system to reduce harmful emissions. When this code is triggered, it indicates that there is a problem with the pump's range or performance, which can lead to inadequate DEF supply and inefficient emission reduction.

OBDII Code P208B RAM - Diesel Exhaust Fluid Reductant Pump Range/Performance
P208B RAM Code - Diesel Exhaust Fluid Reductant Pump Range/Performance

Common Causes of P208B RAM

  1. Faulty reductant pump
  2. Clogged DEF lines
  3. DEF contamination
  4. Wiring issues
  5. Malfunctioning DEF quality sensor

Symptoms of P208B RAM

  1. Reduced engine power
  2. Illuminated check engine light
  3. Poor fuel economy
  4. Increased emissions
  5. Difficulty starting the vehicle

How to Fix P208B RAM

  1. Diagnose the specific cause of the issue using a diagnostic scanner to retrieve the trouble codes and perform further testing if necessary.
  2. Inspect the reductant pump, DEF lines, and quality sensor for any visible damage or blockages.
  3. Clean or replace the reductant pump if it is malfunctioning.
  4. Clear the trouble codes and reset the system to see if the issue has been resolved.
  5. Test drive the vehicle to ensure that the problem has been fixed and that the check engine light does not reappear.

Cost to Fix P208B RAM

The typical repair costs for a Diesel Exhaust Fluid Reductant Pump Range/Performance issue can vary depending on the specific cause of the problem. In general, the cost of replacing a faulty reductant pump can range from $200 to $600, including parts and labor. Additional costs may apply if other components need to be repaired or replaced. It is recommended to consult with a professional mechanic to get an accurate estimate based on the vehicle's make and model. Labor rates at auto repair shops can vary, so it's advisable to inquire about specific rates in your area.

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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 P208B RAM Code

What does the OBDII code P208B mean in a RAM vehicle?

P208B indicates a performance or range issue with the Diesel Exhaust Fluid (DEF) reductant pump, which is responsible for delivering DEF to the exhaust system for emissions control.

What are the common symptoms of P208B in a RAM truck?

Symptoms may include the check engine light, poor engine performance, reduced fuel efficiency, and warnings related to the DEF system or emissions control.

What causes the P208B code to trigger on a RAM vehicle?

Common causes include a faulty DEF reductant pump, clogged DEF lines, low-quality DEF fluid, electrical issues like damaged wiring or connectors, or a malfunctioning pressure sensor.

Can I drive my RAM truck with the P208B code active?

Driving with this code may lead to reduced engine performance and eventually trigger a "limp mode" condition. Prolonged driving without repair can worsen emissions problems or cause further damage.

How can I diagnose the P208B code in a RAM truck?

Diagnosis involves checking the DEF pump and lines for blockages, inspecting wiring and connectors for damage, testing the reductant pressure sensor, and ensuring the DEF fluid is clean and meets specifications.

How is the P208B code typically repaired in a RAM vehicle?

Repairs may include replacing the DEF reductant pump, cleaning or replacing DEF lines, repairing damaged wiring, replacing the pressure sensor, or draining and refilling the DEF tank with proper fluid.

Can low-quality DEF fluid cause the P208B code?

Yes, contaminated or low-quality DEF fluid can clog the system or disrupt the pump’s performance, leading to this code.

How much does it cost to repair the P208B code in a RAM truck?

Repair costs can vary widely, ranging from $200 for minor fixes like cleaning lines or replacing sensors to over $1,000 for a new DEF pump or extensive system repairs.

Is the P208B code covered under warranty for RAM trucks?

Depending on the age and mileage of the vehicle, emissions-related components like the DEF pump may be covered under the manufacturer’s emissions warranty.

What maintenance can help prevent the P208B code in a RAM truck?

Regularly using high-quality DEF fluid, inspecting the DEF system for leaks or damage, and ensuring timely servicing of the emissions system can help prevent this code.

Discuss the causes and fixes for P208B RAM OBDII Code

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