P115C BMW Possible Causes
- Collateral fault caused by other intake system components, Valvetronic, turbocharger
- Leaking intake system
- Faulty hot film mass air flow sensor (HFM)
- Hot film mass air flow sensor (HFM) wiring harness is open or short-circuited
- Poor electrical connection in the hot film mass air flow sensor (HFM) circuit
How to Fix BMW Code P115C?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Check Engine Light on (or Service Engine Soon warning light)
P115C BMW Meaning
The mass air flow must be within a valid range under all engine operating conditions. The diagnostic function compares the calculated air mass from the model with the measured air mass. A malfunction is detected when the mass air flow falls below or exceeds a calibrated minimum or maximum respectively for a calibrated period of time.