AutoCodes – Buick – P200C Buick

P200C Buick 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 Buick 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 319

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

What does this mean?

What are the Possible Causes of the DTC P200C Buick?

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

How to Fix the DTC P200C 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 P200C 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 P200C Buick Code

1. What are common symptoms of OBDII code P200C in a Buick related to Diesel Particulate Filter High Temperature?

- Common symptoms include the Check Engine Light illuminating, reduced engine performance, and possible black smoke from the exhaust.

2. What can cause OBDII code P200C in a Buick related to Diesel Particulate Filter High Temperature?

- The code can be triggered by issues such as a faulty diesel particulate filter, exhaust system leaks, or a malfunctioning temperature sensor.

3. How serious is OBDII code P200C in a Buick related to Diesel Particulate Filter High Temperature?

- Ignoring the code can lead to increased emissions, reduced fuel efficiency, and potential damage to the engine or exhaust system.

4. Can driving with OBDII code P200C in a Buick related to Diesel Particulate Filter High Temperature cause further damage?

- Continuing to drive with the issue can result in further damage to the diesel particulate filter, leading to costly repairs.

5. How can OBDII code P200C in a Buick related to Diesel Particulate Filter High Temperature be diagnosed?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, followed by a thorough inspection of the diesel particulate filter and related components.

6. What are some repair tips for resolving OBDII code P200C in a Buick related to Diesel Particulate Filter High Temperature?

- Repair tips may include cleaning or replacing the diesel particulate filter, repairing any exhaust leaks, and ensuring proper functioning of temperature sensors.

7. Can OBDII code P200C in a Buick related to Diesel Particulate Filter High Temperature be fixed at home?

- While some DIY enthusiasts may attempt to address the issue at home, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. How much does it typically cost to repair OBDII code P200C in a Buick related to Diesel Particulate Filter High Temperature?

- Repair costs can vary depending on the exact cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

9. Is it safe to drive a Buick with OBDII code P200C related to Diesel Particulate Filter High Temperature?

- It is not advisable to drive the vehicle with this issue, as it can lead to further damage and potential safety hazards due to reduced engine performance.

10. How often does OBDII code P200C related to Diesel Particulate Filter High Temperature occur in Buick vehicles?

- While not extremely common, this code can occur in Buick vehicles equipped with diesel engines and diesel particulate filters, especially as these components age.