P1346

P1346

Diagnosis information - Control unit DME (DFI)

Valve lift control Bank 1

Diagnostic conditions

- Small stroke:
- Period since engine was started more than 5 Minute(s)
- Engine speed 1,200 ... 2,200 1/min
- Mass air flow 100 ... 350 mg/stroke

- Large stroke:
- Period since engine was started more than 5 Minute(s)
- Engine speed 1,200 ... 2,400 1/min
- Mass air flow 100 ... 700 mg/stroke

Possible fault causes
- Dynamic driving style when oil level is near minimum (oil foaming)
- Engine oil pressure too high or too low
- Loose contact or corrosion on connectors or lines (Power supply Solenoid valve, hydraulic valve lift control)

Fault setting condition(s)
- Diagnosis detects via the camshafts' vibration behavior that all the valves have either not switched to the other lift or have not switched quickly enough during valve lift switchover.