AutoCodes – Buick – P208D Buick

P208D Buick Code - Reductant Pump Control Circuit High Voltage

Quick Answer

The selective catalytic reduction system reduces Oxides of Nitrogen (NOx) emissions by injecting a metered amount of reductant into the exhaust gas stream entering the selective catalytic reduction catalyst. Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor Assembly 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 Buick indicates Reductant Pump Control Circuit High Voltage.
Common causes: Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor Assembly 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.

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Code Popularity 373

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
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Code P208D Buick Description

The selective catalytic reduction system reduces Oxides of Nitrogen (NOx) emissions by injecting a metered amount of reductant into the exhaust gas stream entering the selective catalytic reduction catalyst. Within the selective catalytic reduction catalyst, the reductant reacts with the NOx to form nitrogen, carbon dioxide, and water vapor. Upstream and downstream NOx sensors provide the Engine Control Module (ECM) and the Reductant Control Module via serial data. The Reductant Control Module varies the amount of reductant added by varying the reductant injector duty cycle in response to changes in engine-out NOx levels. The Reductant Control Module supplies system voltage to the reductant pump motor. The Reductant Control Module controls the solenoid by grounding the control circuit. The Reductant Control Module can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage. The Diagnostic Trouble Code (DTC) will be set when the Reductant Control Module detects a short to voltage in the control circuit.

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

What does this mean?

What are the Possible Causes of the DTC P208D Buick?

Faulty Reductant Pump and Sensor Assembly
Reductant Pump and Sensor Assembly harness is open or shorted
Reductant Pump and Sensor Assembly circuit poor electrical connection
Faulty Reductant Control Module

How to Fix the DTC P208D Buick?

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 Buick 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.

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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 P208D Buick Code

1. What are the common symptoms of OBDII code P208D in a Buick related to the Reductant Pump Control Circuit High Voltage issue?

- Common symptoms may include a check engine light, reduced engine performance, and potential issues with the vehicle's emissions system.

2. What are the possible causes of the OBDII code P208D indicating a Reductant Pump Control Circuit High Voltage problem in a Buick?

- Potential causes can include a faulty reductant pump, problems with the reductant pump control module, wiring issues, or a malfunctioning sensor.

3. How can I diagnose the source of the OBDII code P208D in my Buick that points to a Reductant Pump Control Circuit High Voltage fault?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the reductant pump and related components, checking wiring connections, and conducting voltage tests.

4. Is it safe to continue driving my Buick with the OBDII code P208D for the Reductant Pump Control Circuit High Voltage issue?

- It is generally not recommended to drive the vehicle with this code present, as it can lead to potential damage to the emissions system and affect the vehicle's performance.

5. Can I reset the OBDII code P208D in my Buick related to the Reductant Pump Control Circuit High Voltage problem, or does it require immediate repair?

- While you can clear the code temporarily, it is important to address the underlying issue causing the fault to prevent further complications and ensure proper vehicle operation.

6. What are some repair tips for resolving the OBDII code P208D in a Buick due to a Reductant Pump Control Circuit High Voltage issue?

- Repair tips may include checking and replacing the reductant pump, inspecting and repairing wiring connections, resetting the system, and ensuring proper reinstallation of components.

7. How much does it typically cost to repair the OBDII code P208D in a Buick indicating a Reductant Pump Control Circuit High Voltage fault?

- The cost of repair can vary depending on the specific issue causing the fault, but it may involve expenses for parts, labor, and diagnostic services from a qualified mechanic.

8. Can a DIY enthusiast fix the OBDII code P208D related to a Reductant Pump Control Circuit High Voltage issue in a Buick, or is professional assistance necessary?

- While some DIYers may be able to address simple issues like checking connections or replacing components, complex repairs involving the emissions system are best handled by a professional mechanic.

9. How frequently does the OBDII code P208D occur in Buick vehicles due to a Reductant Pump Control Circuit High Voltage issue?

- The occurrence of this code can vary depending on factors such as vehicle age, maintenance history, and driving conditions, but it is not uncommon in vehicles with emissions system problems.

10. Are there any preventive measures Buick owners can take to avoid encountering the OBDII code P208D related to a Reductant Pump Control Circuit High Voltage fault?

- Regular maintenance, timely inspections of the emissions system, avoiding rough driving conditions, and addressing any warning signs promptly can help prevent the occurrence of this code.