AutoCodes – Generic – P115C

P115C Code - Mass Or Volume Air Flow 'A' Air Mass Too Low Compared To Model

Quick Answer

The mass airflow must lie within a valid range during all engine operating conditions. Common causes include Collateral fault caused by other components in the intake system, Valvetronic, turbocharger, Intake system leaking, Faulty Hot Film Mass (HFM) Air Flow Sensor. 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
P115C indicates Mass Or Volume Air Flow 'A' Air Mass Too Low Compared To Model.
Common causes
Common causes include Collateral fault caused by other components in the intake system, Valvetronic, turbocharger, Intake system leaking, Faulty Hot Film Mass (HFM) Air Flow Sensor.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 18,022
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 30, 2020
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Code P115C Description

The mass airflow must lie within a valid range during all engine operating conditions. The diagnostic function compares the air mass calculated from the model with the measured air mass. A malfunction is detected when the mass airflow respectively falls below or exceeds a calibrated minimum or maximum for a calibrated period of time.
OBDII Code P115C - Mass Or Volume Air Flow 'A' Air Mass Too Low Compared To Model - AutoCodes.com
P115C Code - Mass Or Volume Air Flow 'A' Air Mass Too Low Compared To Model

What are the Possible Causes of the DTC P115C?

  • Collateral fault caused by other components in the intake system, Valvetronic, turbocharger
  • Intake system leaking
  • Faulty Hot Film Mass (HFM) Air Flow Sensor
  • Hot Film Mass (HFM) Air Flow Sensor harness is open or shorted
  • Hot Film Mass (HFM) Air Flow Sensor circuit poor electrical connection

How to Fix the DTC P115C?

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 P115C 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 P115C code?

Need more information on how to fix the P115C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P115C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • P115C BMW β€” Mass Or Volume Air Flow 'A' Air Mass Too Low Compared To Model
  • P115C MINI β€” Mass Or Volume Air Flow 'A' Air Mass Too Low Compared To Model
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 P115C Code

1. What are the common symptoms of OBDII code P115C?

- Common symptoms include reduced engine power, poor fuel economy, rough idling, and potential stalling.

2. What are the possible causes of OBDII code P115C?

- The code P115C can be triggered by a faulty mass airflow sensor, intake air leaks, clogged air filter, or issues with the fuel system.

3. How serious is OBDII code P115C?

- While the code may not cause immediate danger, ignoring it can lead to poor engine performance and reduced fuel efficiency over time.

4. How can I diagnose OBDII code P115C?

- Diagnosing the code typically involves checking the mass airflow sensor, inspecting for air leaks, testing the air filter, and examining the fuel system.

5. What are some repair tips for resolving OBDII code P115C?

- Repair tips may include cleaning or replacing the mass airflow sensor, fixing any air leaks, replacing the air filter, and ensuring proper fuel system operation.

6. Can I drive my vehicle with OBDII code P115C?

- It is not recommended to drive the vehicle with the code unresolved, as it can lead to further damage and decreased performance.

7. How much does it cost to fix OBDII code P115C?

- The cost of fixing the code can vary depending on the root cause, but it may range from a simple DIY fix to a more expensive repair at a mechanic.

8. How long does it take to repair OBDII code P115C?

- The repair time can vary based on the specific issue causing the code, but it may take anywhere from a few minutes to a few hours to resolve.

9. Can OBDII code P115C be triggered intermittently?

- Yes, the code can sometimes be triggered intermittently, especially if the underlying issue is related to a sensor or intermittent problem.

10. Will resetting the OBDII system clear code P115C?

- Resetting the OBDII system may temporarily clear the code, but it will likely return if the underlying issue is not addressed.

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