AutoCodes – BMW – P143E BMW

P143E BMW Code - Direct Ozone Reduction Catalyst Temperature Sensor Gradient Too Low

Quick Answer

The Engine Control Module (ECM) monitors the Direct Ozone Reduction Catalyst Temperature Sensor. Common causes include Faulty Direct Ozone Reduction Catalyst Temperature Sensor, Direct Ozone Reduction Catalyst Temperature Sensor harness is open or shorted, Direct Ozone Reduction Catalyst 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: P143E BMW indicates Direct Ozone Reduction Catalyst Temperature Sensor Gradient Too Low.
Common causes: Common causes include Faulty Direct Ozone Reduction Catalyst Temperature Sensor, Direct Ozone Reduction Catalyst Temperature Sensor harness is open or shorted, Direct Ozone Reduction Catalyst 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 20,424

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 Sep 27, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P143E BMW Description

The Engine Control Module (ECM) monitors the Direct Ozone Reduction Catalyst Temperature Sensor. The ECM sets the OBDII code when the Direct Ozone Reduction Catalyst Temperature Sensor is not to factory specifications.

OBDII Code P143E BMW - Direct Ozone Reduction Catalyst Temperature Sensor Gradient Too Low - AutoCodes.com — P143E BMW Code - Direct Ozone Reduction Catalyst Temperature Sensor Gradient Too Low

What does this mean?

What are the Possible Causes of the DTC P143E BMW?

Faulty Direct Ozone Reduction Catalyst Temperature Sensor
Direct Ozone Reduction Catalyst Temperature Sensor harness is open or shorted
Direct Ozone Reduction Catalyst Temperature Sensor circuit poor electrical connection

How to Fix the DTC P143E BMW?

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 P143E BMW 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 P143E BMW code?

Need more information on how to fix the P143E BMW code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P143E BMW code diagnosed by a professional: Find a repair shop in your area

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 P143E BMW Code

1. What are the common symptoms of OBDII code P143E in a BMW?

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

2. What can cause the OBDII code P143E in a BMW?

This code is typically caused by a malfunction in the direct ozone reduction catalyst temperature sensor, which results in a low gradient reading.

3. How serious is the OBDII code P143E in a BMW?

While the code may not cause immediate harm to the vehicle, it can lead to increased emissions and potential damage to the catalytic converter if left unresolved.

4. How can I diagnose the direct ozone reduction catalyst temperature sensor issue causing code P143E?

A thorough inspection of the sensor, its wiring, and connections should be conducted to identify any damage or malfunction. Testing the sensor's output using a diagnostic tool is also recommended.

5. Can I continue driving my BMW with the OBDII code P143E present?

It is not recommended to ignore the code and continue driving, as it can lead to long-term issues with the vehicle's emissions system and overall performance.

6. What are the repair options for OBDII code P143E in a BMW?

Repair options include replacing the direct ozone reduction catalyst temperature sensor, repairing any damaged wiring or connections, and clearing the code with a diagnostic tool.

7. How much does it cost to fix OBDII code P143E in a BMW?

The cost of repair can vary depending on the extent of the issue and the labor rates of the repair shop. On average, replacing the sensor and addressing related issues can range from $200 to $500.

8. Can I prevent OBDII code P143E from occurring in my BMW?

Regular maintenance and inspections of the vehicle's emissions system, including the direct ozone reduction catalyst temperature sensor, can help prevent the code from occurring.

9. Are there any DIY fixes for OBDII code P143E in a BMW?

While some may attempt to replace the sensor themselves, it is recommended to have a professional diagnose and repair the issue to ensure proper functioning of the emissions system.

10. How long does it take to repair OBDII code P143E in a BMW?

The repair time can vary depending on the availability of parts and the complexity of the issue. On average, it may take a few hours to a full day to diagnose and fix the problem.