AutoCodes – BMW – P124C BMW

P124C BMW Code - Nitrogen Oxide Sensor Operating Readiness Signal Not Available At Start

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: P124C BMW indicates Nitrogen Oxide Sensor Operating Readiness Signal Not Available At Start.
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 3,221

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 P124C 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 P124C BMW - Nitrogen Oxide Sensor Operating Readiness Signal Not Available At Start - AutoCodes.com — P124C BMW Code - Nitrogen Oxide Sensor Operating Readiness Signal Not Available At Start

What does this mean?

What are the Possible Causes of the DTC P124C BMW?

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

How to Fix the DTC P124C 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 P124C 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 P124C BMW code?

Need more information on how to fix the P124C BMW code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P124C 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 P124C BMW Code

1. What are the common symptoms of OBDII code P124C in a BMW?

The common symptoms of OBDII code P124C in a BMW include poor engine performance, decreased fuel efficiency, and the illumination of the Check Engine light.

2. What causes the OBDII code P124C in a BMW?

The OBDII code P124C in a BMW is typically caused by a malfunction in the nitrogen oxide sensor or a wiring issue related to the sensor.

3. How can I diagnose the OBDII code P124C in my BMW?

Diagnosing the OBDII code P124C in your BMW involves using an OBDII scanner to retrieve the code and then inspecting the nitrogen oxide sensor and its wiring for any visible damage or issues.

4. Can I continue driving my BMW with the OBDII code P124C?

It is not recommended to continue driving your BMW with the OBDII code P124C, as it can lead to further damage to the vehicle and potentially cause harm to the environment.

5. How can I repair the OBDII code P124C in my BMW?

To repair the OBDII code P124C in your BMW, you may need to replace the nitrogen oxide sensor or repair any damaged wiring associated with the sensor.

6. Is the OBDII code P124C related to emissions control in a BMW?

Yes, the OBDII code P124C in a BMW is related to emissions control, specifically indicating that the nitrogen oxide sensor operating readiness signal is not available at start.

7. Can a DIY enthusiast fix the OBDII code P124C in a BMW?

While some DIY enthusiasts may be able to troubleshoot and repair the OBDII code P124C in a BMW, it is recommended to seek professional help for accurate diagnosis and repair.

8. How much does it cost to fix the OBDII code P124C in a BMW?

The cost to fix the OBDII code P124C in a BMW can vary depending on the underlying issue, but it may involve replacing the nitrogen oxide sensor or repairing wiring, potentially costing a few hundred dollars.

9. Will resetting the Check Engine light resolve the OBDII code P124C in a BMW?

Simply resetting the Check Engine light will not resolve the OBDII code P124C in a BMW. It is important to diagnose the root cause of the issue and address it accordingly.

10. Are there any preventative maintenance tips to avoid the OBDII code P124C in a BMW?

Regularly servicing your BMW, including checking and maintaining the emissions control system, can help prevent issues like the OBDII code P124C from occurring.