AutoCodes – BMW – P138F BMW

P138F BMW Code - Crankshaft Sensor Synchronization Malfunction

Quick Answer

The Engine Control Module (ECM) monitors the Crankshaft Sensor. Common causes include Faulty Crankshaft Sensor, Crankshaft Sensor harness is open or shorted, Crankshaft 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: P138F BMW indicates Crankshaft Sensor Synchronization Malfunction.
Common causes: Common causes include Faulty Crankshaft Sensor, Crankshaft Sensor harness is open or shorted, Crankshaft 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 5,732

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 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P138F BMW Description

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

OBDII Code P138F BMW - Crankshaft Sensor Synchronization Malfunction - AutoCodes.com — P138F BMW Code - Crankshaft Sensor Synchronization Malfunction

What does this mean?

What are the Possible Causes of the DTC P138F BMW?

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

How to Fix the DTC P138F 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 P138F 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 P138F BMW code?

Need more information on how to fix the P138F BMW code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P138F 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 P138F BMW Code

1. What are the common symptoms of OBDII code P138F in a BMW related to Crankshaft Sensor Synchronization Malfunction?

- Common symptoms include rough idling, engine misfires, stalling, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P138F in a BMW indicating Crankshaft Sensor Synchronization Malfunction?

- The code may be triggered by a faulty crankshaft position sensor, issues with the timing chain, or problems with the engine control module.

3. How can I diagnose the Crankshaft Sensor Synchronization Malfunction associated with OBDII code P138F in my BMW?

- Diagnosis typically involves checking the crankshaft position sensor for proper function, inspecting the timing chain for wear or misalignment, and scanning the engine control module for related error codes.

4. Is it safe to continue driving my BMW with OBDII code P138F related to Crankshaft Sensor Synchronization Malfunction?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine damage and potential safety hazards.

5. Can I reset the OBDII code P138F in my BMW without addressing the underlying Crankshaft Sensor Synchronization Malfunction?

- Resetting the code without fixing the root cause will likely result in the code reappearing once the issue persists, so it is best to address the problem first.

6. What repairs are typically needed to resolve OBDII code P138F in a BMW due to Crankshaft Sensor Synchronization Malfunction?

- Repairs may involve replacing the faulty crankshaft position sensor, addressing timing chain issues, or reprogramming the engine control module.

7. Are there any DIY tips for addressing OBDII code P138F in a BMW related to Crankshaft Sensor Synchronization Malfunction?

- DIY tips include checking the sensor's wiring for damage, ensuring proper alignment of the timing chain, and using specialized diagnostic tools for troubleshooting.

8. How much does it cost to repair OBDII code P138F associated with Crankshaft Sensor Synchronization Malfunction in a BMW?

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

9. Can a mechanic easily fix OBDII code P138F related to Crankshaft Sensor Synchronization Malfunction in a BMW?

- A qualified mechanic with experience in BMW diagnostics should be able to diagnose and repair the issue effectively, ensuring proper synchronization of the crankshaft sensor.

10. Will fixing OBDII code P138F in my BMW eliminate all related performance issues?

- Resolving the Crankshaft Sensor Synchronization Malfunction indicated by this code should address the associated symptoms, improving the overall performance and reliability of the vehicle.