AutoCodes – GMC – P200E GMC

P200E GMC Code - Catalyst System High Temperature

Quick Answer

The diesel exhaust aftertreatment system consists of an under hood pre-catalyst and an underbody catalyst. Common causes include Faulty Catalytic Temperature Sensor, Catalytic Temperature Sensor harness is open or shorted, Catalytic Temperature Sensor 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: P200E GMC indicates Catalyst System High Temperature.
Common causes: Common causes include Faulty Catalytic Temperature Sensor, Catalytic Temperature Sensor harness is open or shorted, Catalytic Temperature Sensor 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 524

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 P200E 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 P200E GMC - Catalyst System High Temperature - AutoCodes.com — P200E GMC Code - Catalyst System High Temperature

What does this mean?

What are the Possible Causes of the DTC P200E GMC?

Faulty Catalytic Temperature Sensor
Catalytic Temperature Sensor harness is open or shorted
Catalytic Temperature Sensor circuit poor electrical connection

How to Fix the DTC P200E 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 P200E 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 P200E GMC Code

1. What are the common symptoms of OBDII code P200E (Catalyst System High Temperature) in a GMC vehicle?

- Common symptoms include decreased engine performance, reduced fuel efficiency, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P200E in a GMC, indicating a Catalyst System High Temperature issue?

- The code P200E can be triggered by issues such as a failing catalytic converter, a faulty oxygen sensor, or a malfunctioning exhaust system component.

3. How can I diagnose the OBDII code P200E in my GMC related to the Catalyst System High Temperature problem?

- Diagnosis typically involves using an OBDII scanner to retrieve the fault code, conducting a visual inspection of the exhaust system, and testing the oxygen sensors and catalytic converter.

4. Is it safe to continue driving my GMC with the OBDII code P200E (Catalyst System High Temperature) illuminated?

- It is not recommended to continue driving with this code illuminated, as it can lead to further damage to the catalytic converter and potentially result in more expensive repairs.

5. What are some repair tips for resolving the OBDII code P200E in a GMC with a Catalyst System High Temperature issue?

- Repair tips may include replacing the catalytic converter, repairing or replacing faulty oxygen sensors, checking for exhaust leaks, and ensuring proper engine maintenance.

6. Can a DIY enthusiast tackle the repair of the OBDII code P200E in a GMC with a Catalyst System High Temperature problem?

- While some aspects of the repair may be DIY-friendly, diagnosing and fixing issues related to the catalytic converter and exhaust system may require professional expertise and specialized tools.

7. How much can I expect to pay for repairing the OBDII code P200E (Catalyst System High Temperature) in a GMC?

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

8. Will resetting the Check Engine Light resolve the OBDII code P200E in a GMC with a Catalyst System High Temperature issue?

- Resetting the Check Engine Light may temporarily turn off the warning, but it will not fix the underlying problem causing the code P200E.

9. Are there any preventative maintenance steps I can take to avoid encountering the OBDII code P200E related to Catalyst System High Temperature in my GMC?

- Regularly servicing your vehicle, addressing any engine performance issues promptly, and ensuring proper maintenance of the exhaust system can help prevent the occurrence of this code.

10. Can the OBDII code P200E (Catalyst System High Temperature) in a GMC be related to other underlying issues besides the catalyst system?

- While the code primarily points to catalyst system high temperature problems, it is essential to perform a thorough diagnosis to rule out related issues with the engine, sensors, or exhaust system.