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Engine-Codes – GMC – P208C GMC

P208C GMC Code - Reductant Pump Control Circuit Low Voltage

Quick Answer

The P208C diagnostic trouble code (DTC) for GMC vehicles refers to the Reductant Pump Control Circuit Low Voltage. Common causes include Faulty reductant pump, Wiring issues in the reductant pump control circuit, Corrosion or damage to electrical connectors. 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
P208C GMC indicates Reductant Pump Control Circuit Low Voltage.
Common causes
Common causes include Faulty reductant pump, Wiring issues in the reductant pump control circuit, Corrosion or damage to electrical connectors.
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
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Code P208C GMC Description

The P208C diagnostic trouble code (DTC) for GMC vehicles refers to the Reductant Pump Control Circuit Low Voltage. This code indicates that the powertrain control module (PCM) has detected a low voltage condition in the reductant pump control circuit. The reductant pump is a crucial component of the selective catalytic reduction (SCR) system, which helps reduce harmful emissions in diesel engines.

OBDII Code P208C GMC - Reductant Pump Control Circuit Low Voltage
P208C GMC Code - Reductant Pump Control Circuit Low Voltage

Common Causes of P208C GMC

  1. Faulty reductant pump
  2. Wiring issues in the reductant pump control circuit
  3. Corrosion or damage to electrical connectors
  4. Defective PCM
  5. Low DEF fluid level

Symptoms of P208C GMC

  1. Check engine light illuminated
  2. Reduced engine power
  3. Poor fuel economy
  4. Failed emissions test
  5. Increased NOx emissions

How to Fix P208C GMC

  1. Diagnose the issue: Use a scan tool to read the DTC and determine the exact cause of the low voltage condition in the reductant pump control circuit.
  2. Inspect wiring and connectors: Check for any damaged or corroded wiring and connectors in the reductant pump control circuit. Repair or replace as necessary.
  3. Test reductant pump: Verify the functionality of the reductant pump by testing its operation and voltage levels. Replace if found to be faulty.
  4. Clear codes and reset PCM: After repairing the issue, clear the DTC and reset the PCM to see if the problem has been resolved.
  5. Verify repair: Test drive the vehicle and monitor for any recurring issues. Ensure that the check engine light does not reappear.

Cost to Fix P208C GMC

The cost of repairing a P208C DTC for a GMC vehicle can vary depending on the specific cause of the issue. In general, the cost of parts for a reductant pump replacement ranges from $200 to $500, while the labor cost can range from $100 to $300. Overall, the total repair cost for addressing a P208C DTC could range from $300 to $800. However, it's important to note that labor rates and diagnostic fees can vary based on location and the type of repair facility. It's recommended to consult with a local auto repair shop for a more accurate estimate.

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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 P208C GMC Code

1. What are the common symptoms of OBDII code P208C GMC (Reductant Pump Control Circuit Low Voltage)?

- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P208C GMC?

- Possible causes include a faulty reductant pump, damaged wiring or connectors in the control circuit, or a malfunctioning powertrain control module (PCM).

3. How can I diagnose the issue related to code P208C GMC?

- Diagnose by checking the reductant pump for proper operation, inspecting the wiring and connectors for any damage, and using a scan tool to analyze the control circuit voltage.

4. What are some repair tips for resolving OBDII code P208C GMC?

- Repair tips include replacing the faulty reductant pump, repairing any damaged wiring or connectors, and resetting the fault codes using a scan tool after completing repairs.

5. Can driving with OBDII code P208C GMC cause further damage to the vehicle?

- Continuing to drive with this code may lead to decreased engine efficiency and potential damage to the emissions control system, so it is recommended to address the issue promptly.

6. Is it safe to ignore OBDII code P208C GMC and continue driving the vehicle?

- Ignoring this code can result in poor engine performance and potential emissions issues, so it is not advisable to ignore it. It's best to have the issue diagnosed and repaired as soon as possible.

7. How much does it typically cost to repair OBDII code P208C GMC?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve parts and labor expenses ranging from $200 to $500 or more.

8. Can I reset OBDII code P208C GMC without fixing the underlying issue?

- While you can reset the code using a scan tool, the underlying issue causing the code will persist. It is recommended to address the root cause of the problem to prevent further issues.

9. Will OBDII code P208C GMC cause my vehicle to fail an emissions test?

- Yes, having this code stored in the vehicle's system may cause it to fail an emissions test due to potential issues with the reductant pump control circuit.

10. How can I prevent OBDII code P208C GMC from recurring in the future?

- To prevent the code from recurring, it's important to perform regular maintenance on the emissions control system, address any issues promptly, and follow the manufacturer's recommended service schedule.

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