P1174 BMW Possible Causes
- Intake leak
- Faulty oxygen sensor
- Faulty mass air flow (MAF) sensor
How is BMW P1174 Code Repair Done?
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)
P1174 BMW Meaning
P1175 is a condition where there is a lean fuel balance or more air than fuel ratio, what determines the lean fuel condition is the O2 sensor, it’s more a condition where the O2 detected more air and the engine management cannot adapt. Check for vacuum leaks, particularly at the mass air flow (MAF) sensor air duct boot.