AutoCodes – GMC – P200C GMC

P200C GMC Code - Diesel Particulate Filter High Temperature

Quick Answer

The diesel exhaust aftertreatment system consists of an under hood pre-catalyst and an underbody catalyst. Common causes include Perform the Diesel Particulate Filter Service Regeneration, Replace Diesel Particulate Filter (DPF). 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: P200C GMC indicates Diesel Particulate Filter High Temperature.
Common causes: Common causes include Perform the Diesel Particulate Filter Service Regeneration, Replace Diesel Particulate Filter (DPF).
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 701

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 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 P200C GMC Description

The diesel exhaust aftertreatment system consists of an under hood pre-catalyst and an underbody catalyst. The underbody catalyst also consists of the main diesel oxidation catalyst and the coated Diesel Particulate Filter (DPF). One of the main purposes of the DPF is to collect particulates from the engine exhaust in order to minimize discharge of soot to the atmosphere. The soot particles accumulate in the channels of the DPF and are burned off at regular intervals through a process called regeneration. This prevents the DPF from clogging. The Engine Control Module (ECM) commands the DPF regeneration after calculating various vehicle conditions such as DPF pressure difference, exhaust gas temperature, engine oil quality, engine speed, etc. Excessive accumulation of the soot in the DPF can cause a drop in the engine performance. During regeneration, additional fuel is injected via multiple post injections in order to increase the exhaust gas temperature. During this period, the DPF temperature is raised to approximately 600°C (1112°F) and the accumulated soot is oxidized or burned off into carbon dioxide (CO2).
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the particulate filter has degraded beyond a calibrated threshold.

OBDII Code P200C GMC - Diesel Particulate Filter High Temperature - AutoCodes.com — P200C GMC Code - Diesel Particulate Filter High Temperature

What does this mean?

What are the Possible Causes of the DTC P200C GMC?

Perform the Diesel Particulate Filter Service Regeneration
Replace Diesel Particulate Filter (DPF)

How to Fix the DTC P200C GMC?

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 P200C GMC 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 P200C GMC Code

1. What are the common symptoms of OBDII code P200C GMC (Diesel Particulate Filter High Temperature)?

- Common symptoms include reduced engine power, poor fuel economy, black smoke from the exhaust, and the illumination of the check engine light.

2. What are some possible causes of OBDII code P200C GMC (Diesel Particulate Filter High Temperature)?

- Possible causes include a faulty diesel particulate filter (DPF), exhaust system leaks, sensor issues, engine misfires, or a malfunctioning temperature sensor.

3. How can I diagnose the OBDII code P200C GMC (Diesel Particulate Filter High Temperature)?

- Diagnosis typically involves scanning the vehicle's onboard computer for the specific trouble code and performing a thorough inspection of the DPF system, sensors, and exhaust components.

4. What are some repair tips for addressing OBDII code P200C GMC (Diesel Particulate Filter High Temperature)?

- Repair tips may include cleaning or replacing the DPF, repairing any exhaust leaks, testing and replacing faulty sensors, checking for engine misfires, and ensuring proper regeneration of the DPF.

5. Can I continue driving my vehicle with the OBDII code P200C GMC (Diesel Particulate Filter High Temperature)?

- It is not recommended to continue driving the vehicle with this code, as it can lead to further damage to the DPF system and engine components. Seek professional diagnosis and repairs promptly.

6. How much does it typically cost to repair OBDII code P200C GMC (Diesel Particulate Filter High Temperature)?

- The cost of repairs can vary depending on the specific issue causing the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Can I clear the OBDII code P200C GMC (Diesel Particulate Filter High Temperature) with a simple reset?

- While clearing the code with a reset may temporarily turn off the check engine light, the underlying issue causing the code will persist. It is best to address the root cause of the problem.

8. How often should the diesel particulate filter (DPF) be inspected and maintained to prevent OBDII code P200C GMC (Diesel Particulate Filter High Temperature)?

- It is recommended to have the DPF system inspected and maintained as per the manufacturer's guidelines, typically every 30,000 to 50,000 miles, to prevent issues like high temperature warnings.

9. Are there any preventive measures to avoid encountering OBDII code P200C GMC (Diesel Particulate Filter High Temperature)?

- Regular maintenance, such as using high-quality diesel fuel, driving at highway speeds to aid DPF regeneration, and avoiding short trips, can help prevent issues leading to this trouble code.

10. Is it possible to bypass or delete the diesel particulate filter (DPF) to avoid OBDII code P200C GMC (Diesel Particulate Filter High Temperature)?

- Bypassing or deleting the DPF is not recommended, as it can lead to legal issues, environmental harm, and potential damage to the engine and emission control systems. It is best to address the root cause of the code through proper repairs.