Possible fault causes
- Dynamic driving style when oil level is near minimum (oil foaming)
- Oil supply too low
→(e.g. dirty (oil circuit)...)
- Large differences in exhaust backpressure between banks (e.g. due to constricted or blocked passage of an exhaust branch).
- Wrong timing, one bank (intake camshaft or exhaust camshaft)
- Solenoid valve for hydraulic valve lift control faulty
→(mechanical fault or electrical fault in circuit)
- 1 oxygen sensor aged or faulty
- For engines with VTG turbocharger:
- Actuating rod for boost pressure adjuster disengaged