P1373

P1373

Diagnosis information - Control unit DME (DFI)

Valve lift control Bank 2

Diagnostic conditions
- Short test perform

or:
- Oil temperature Engine less than 111 °C (°F)

- Small stroke:
- Engine speed 1,500 ... 3,000 1/min
- Mass air flow
- more than 500 ... more than 100 mg/stroke (depending on: Engine speed)

- Large stroke:
- Engine speed 2,000 ... 5,000 1/min
- Mass air flow
- more than 700 ... more than 300 mg/stroke (depending on: Engine speed)

Possible fault causes
- Dynamic driving style when oil level is near minimum (oil foaming)
- Oil supply too low
--> (e.g. Soiling (Oil circuit), ...)
- Large differences in exhaust backpressure between banks (e.g. due to constricted or blocked passage of an exhaust branch).
- Electronic adjuster for turbocharger detached
- Timing incorrect, a bank (Intake camshaft or Exhaust camshaft)
- Solenoid valve, hydraulic camshaft adjustment Faulty
--> (Mechanical fault or Electrical fault in circuit)
- 1 Oxygen sensor(s) aged or Faulty

Fault setting condition(s)
- Diagnosis detects via the lambda controllers that all the valves on the bank have either not switched to the other lift or have not switched quickly enough during valve lift switchover.