AutoCodes – BMW – P124D BMW

P124D BMW Code - Nitrogen Oxide Sensor Operational Readiness Signal Not Available During Operation

Quick Answer

The Engine Control Module (ECM) monitors the NOx Sensor. Common causes include Faulty NOx Sensor, NOx Sensor harness is open or shorted, NOx 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: P124D BMW indicates Nitrogen Oxide Sensor Operational Readiness Signal Not Available During Operation.
Common causes: Common causes include Faulty NOx Sensor, NOx Sensor harness is open or shorted, NOx 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 8,697

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 Aug 12, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P124D BMW Description

The Engine Control Module (ECM) monitors the NOx Sensor. The ECM sets the OBDII code when the NOx Sensor is not to factory specifications.

OBDII Code P124D BMW - Nitrogen Oxide Sensor Operational Readiness Signal Not Available During Operation - AutoCodes.com — P124D BMW Code - Nitrogen Oxide Sensor Operational Readiness Signal Not Available During Operation

What does this mean?

What are the Possible Causes of the DTC P124D BMW?

Faulty NOx Sensor
NOx Sensor harness is open or shorted
NOx Sensor circuit poor electrical connection

How to Fix the DTC P124D 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 P124D 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 P124D BMW code?

Need more information on how to fix the P124D BMW code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P124D 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 P124D BMW Code

1. What are the common symptoms of OBDII code P124D in a BMW related to the Nitrogen Oxide Sensor Operational Readiness Signal?

- Common symptoms include the Check Engine Light illuminating, reduced engine performance, and potential failure to pass emissions testing.

2. What could be causing the OBDII code P124D to trigger in a BMW?

- The code P124D can be triggered by issues such as a faulty nitrogen oxide sensor, wiring or connector problems, or ECM (Engine Control Module) issues.

3. How can I diagnose the OBDII code P124D in my BMW?

- Diagnosis usually involves using an OBDII scanner to read the code, inspecting the nitrogen oxide sensor and its connections for any visible damage, and checking the wiring for continuity.

4. Can I continue driving my BMW with the OBDII code P124D present?

- It is advisable to address the underlying issue causing the code as soon as possible to prevent potential damage to the engine or emissions control system.

5. What is the typical repair process for fixing OBDII code P124D in a BMW?

- The repair process may involve replacing the nitrogen oxide sensor, repairing or replacing damaged wiring or connectors, and clearing the code with an OBDII scanner.

6. Are there any DIY tips for resolving the OBDII code P124D in a BMW?

- DIY tips include checking for loose or damaged wiring, ensuring proper sensor connections, and consulting the vehicle's service manual for specific troubleshooting steps.

7. How much does it cost to repair OBDII code P124D in a BMW?

- Repair costs can vary depending on the exact cause of the issue, but they typically range from $200 to $500 for parts and labor.

8. Can a failing nitrogen oxide sensor cause other problems in a BMW?

- A failing nitrogen oxide sensor can lead to decreased fuel efficiency, increased emissions, and potential damage to the catalytic converter if left unresolved.

9. How long does it take to repair OBDII code P124D in a BMW?

- The repair time can vary based on the specific cause of the issue and the availability of parts, but it typically takes a few hours to a full day for a professional technician to address the problem.

10. Is it possible to prevent OBDII code P124D from recurring in my BMW?

- Regular maintenance, including timely sensor inspections and addressing any underlying issues promptly, can help prevent the recurrence of the OBDII code P124D in your BMW.