AutoCodes – Generic – P200E

P200E 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 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 10,279

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

What does this mean?

What are the Possible Causes of the DTC P200E?

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?

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 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.

Need more information about the P200E code?

Need more information on how to fix the P200E code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P200E code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P200E Buick — Catalyst System High Temperature
P200E Cadillac — Catalyst System High Temperature
P200E Chevrolet — Catalyst System High Temperature
P200E Ford — Catalyst System Over Temperature Bank 1
P200E GMC — Catalyst System High Temperature

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 Code

1. What does the OBD-II code P200E mean?

P200E indicates that the catalyst system is experiencing excessively high temperatures, which can damage the catalytic converter and related components.

2. What are the common symptoms of a P200E code?

Symptoms may include the check engine light turning on, reduced engine performance, poor fuel efficiency, and a noticeable burning smell from the exhaust.

3. What causes the P200E code to appear?

Common causes include a malfunctioning oxygen sensor, excessive fuel entering the exhaust system, a clogged catalytic converter, or ignition timing issues.

4. Can driving with a P200E code damage my vehicle?

Yes, driving with this code can lead to damage to the catalytic converter or other exhaust components due to prolonged high temperatures.

5. How is the P200E code diagnosed?

A mechanic will typically use an OBD-II scanner to confirm the code, inspect the oxygen sensors and catalytic converter, and check for issues with fuel delivery or ignition timing.

6. How do I fix the P200E code?

Repairs may involve replacing faulty sensors, repairing exhaust leaks, cleaning or replacing the catalytic converter, or addressing fuel system issues.

7. Can a faulty oxygen sensor cause the P200E code?

Yes, a malfunctioning oxygen sensor can provide incorrect readings, leading to improper fuel mixture and high exhaust temperatures.

8. Is a P200E code related to a failing catalytic converter?

It can be; a clogged or damaged catalytic converter may contribute to high temperatures in the exhaust system.

9. How much does it cost to repair a P200E code?

Repair costs vary but may range from $100 for sensor replacements to over $1,000 if the catalytic converter needs replacement.

10. Can I fix the P200E code myself?

If you have experience and the proper tools, you might replace sensors or clean components, but diagnosing the root cause often requires professional assistance.