Turbo Oil Supply Line Restricted
2001-2005 BMW 325i E46 2.5L I6 🇨🇦
Description
The oil supply line to the turbocharger is restricted, reducing oil flow for bearing lubrication and cooling. This will cause premature turbo failure.
Symptoms
- Turbo whine or whistling changing pitch
- Smoke from turbo area
- Reduced turbo performance
- Elevated turbo bearing temperature
- Oil smell from engine bay
- Turbo shaft play increasing
Common Causes
- Oil supply line carbon buildup
- Oil supply banjo bolt screen clogged
- Kinked or collapsed oil supply line
- Incorrect oil supply gasket blocking hole
- Sludge in oil feed gallery
Diagnostic Steps
- Check oil flow at turbo feed line
- Inspect oil supply banjo bolt and screen
- Check oil return line for restriction
- Monitor turbo bearing temperature if possible
- Inspect turbo shaft for play
Repair Notes
Clean or replace turbo oil supply line. Replace banjo bolt screen if clogged. Inspect turbo bearings for damage. Address oil sludge cause.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P3037 on Other Vehicles
Common Questions
What does code P3037 mean on a 2001-2005 BMW 325i E46?
P3037 stands for "Turbo Oil Supply Line Restricted". The oil supply line to the turbocharger is restricted, reducing oil flow for bearing lubrication and cooling. This will cause premature turbo failure.
What are the symptoms of P3037 on a BMW 325i E46?
Common symptoms of P3037 include: Turbo whine or whistling changing pitch, Smoke from turbo area, Reduced turbo performance, Elevated turbo bearing temperature, Oil smell from engine bay, Turbo shaft play increasing.
What causes P3037 on a 2001-2005 BMW 325i E46?
Common causes of P3037 include: Oil supply line carbon buildup, Oil supply banjo bolt screen clogged, Kinked or collapsed oil supply line, Incorrect oil supply gasket blocking hole, Sludge in oil feed gallery.