AutoCodes – Generic – P208D

P208D Code - Reductant Pump Control Circuit High

Quick Answer

The reductant pump assembly contains a diaphragm pressure pump, a pressure sensor, a purge valve, an outlet filter and an internal heating element. Common causes include Faulty Reductant Pump, Reductant Pump harness is open or shorted, Reductant 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: P208D indicates Reductant Pump Control Circuit High.
Common causes: Common causes include Faulty Reductant Pump, Reductant Pump harness is open or shorted, Reductant 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 19,040

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 Jul 26, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P208D Description

The reductant pump assembly contains a diaphragm pressure pump, a pressure sensor, a purge valve, an outlet filter and an internal heating element. The reductant pressure sensor provides feedback to Powertrain Control Module (PCM), which regulates system pressure by controlling pump speed using pulse width modulation. When PCM requests reductant injection, the reductant injector opens and the pump operates, filling reductant pressure line and injector and purging air from the system. When all air is purged, injector closes and pump builds pressure to 73 psi. (500 kPa). The system is then primed and injector provides DEF to the SCR catalyst as determined by PCM.
When the vehicle is shut down, PCM closes injector and actuates reductant purge valve, causing the pump to reverse flow and bleed down pressure on reductant pressure line. The PCM then opens injector to allow gas to enter reductant pressure line, which in turn allows the pump to purge all remaining DEF from the system and return it to reductant tank. The PCM closes injector and returns purge valve to forward position. The PCM commands glow plug control module to provide voltage to reductant pump assembly internal heating element when reductant temperature approaches 12°F (-11°C).

OBDII Code P208D - Reductant Pump Control Circuit High - AutoCodes.com — P208D Code - Reductant Pump Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P208D?

Faulty Reductant Pump
Reductant Pump harness is open or shorted
Reductant Pump circuit poor electrical connection

How to Fix the DTC P208D?

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 P208D 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 P208D code?

Need more information on how to fix the P208D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P208D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P208D Buick — Reductant Pump Control Circuit High Voltage
P208D Cadillac — Reductant Pump Control Circuit High Voltage
P208D Chevrolet — Reductant Pump Control Circuit High Voltage
P208D Dodge — Diesel Exhaust Fluid Reductant Pump Control Circuit Low
P208D Ford — Reductant Pump Control Circuit High
P208D GMC — Reductant Pump Control Circuit High Voltage
P208D RAM — Diesel Exhaust Fluid Reductant Pump 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 P208D Code

1. What are the common symptoms of OBDII code P208D (Reductant Pump Control Circuit High)?

The common symptoms of P208D include the Check Engine Light illuminating on the dashboard, reduced engine performance, and potential issues with the reductant system.

2. What causes the OBDII code P208D to trigger?

P208D is triggered when the powertrain control module (PCM) detects a high voltage in the control circuit of the reductant pump, indicating a potential electrical issue with the pump or its circuitry.

3. How serious is the OBDII code P208D (Reductant Pump Control Circuit High)?

While P208D may not cause immediate drivability issues, it is important to address this code promptly to prevent potential damage to the reductant pump and ensure proper emission control system operation.

4. Can I continue driving with OBDII code P208D present?

It is generally not recommended to ignore OBDII codes like P208D, as unresolved issues can lead to more severe problems over time. It is advisable to have the vehicle diagnosed and repaired as soon as possible.

5. How can I diagnose and repair OBDII code P208D?

Diagnosing P208D involves testing the reductant pump circuit, checking for loose or damaged wiring, inspecting the pump itself, and verifying the operation of related components. Repair often involves fixing wiring issues, replacing the reductant pump, or addressing faulty connectors.

6. Are there any DIY tips for fixing OBDII code P208D?

While some basic troubleshooting like checking for loose connections or blown fuses can be done by DIY enthusiasts, diagnosing and repairing P208D may require specialized tools and expertise. It is best to consult a qualified mechanic for proper diagnosis and repair.

7. Will resetting the Check Engine Light resolve OBDII code P208D?

Simply resetting the Check Engine Light will not fix the underlying issue causing P208D. The code may return if the root cause is not addressed. It is crucial to diagnose and repair the problem to prevent further issues.

8. How much does it typically cost to repair OBDII code P208D?

The cost of repairing P208D can vary depending on the cause of the issue, labor rates, and parts needed. It is advisable to obtain quotes from different repair shops to get an accurate estimate for the repair.

9. Can extreme weather conditions contribute to triggering OBDII code P208D?

Extreme weather conditions such as excessive heat or moisture can potentially affect the electrical components of the reductant pump system, leading to issues that may trigger code P208D. Ensure proper maintenance and protection of the vehicle in such conditions.

10. Is OBDII code P208D specific to certain vehicle makes and models?

While OBDII codes are standardized, the specific description of code P208D may vary slightly between different vehicle manufacturers. It is essential to consult the vehicle's service manual or a diagnostic tool for accurate information tailored to your specific make and model.