P1373

P1373

Diagnosis information - Control unit DME (DFI)

Valve lift control Bank 2

Diagnostic conditions
- Short test perform
or:
- Oil temperature Engine < 111 °C (°F)
- Small stroke:
- Engine speed 1200 ... 3000 1/min
- Mass air flow
- > 300 ... > 175 mg/stroke (depending on : Engine speed)
- < 600 mg/stroke

- Adjustment Intake camshaft > 11°

- Large stroke stroke:
- Engine speed 1500 ... 5000 1/min
- Mass air flow
- > 800 ... > 325 mg/stroke (depending on : Engine speed)

Possible fault causes
- Oil supply too low
-->e.g. Soiling (Oil circuit), Scavenging restrictor Faulty (Cylinder head)
- Large differences in exhaust backpressure between banks (e.g. due to constricted or blocked passage of an exhaust branch).
- Timing incorrect, a bank (Intake camshaft or Exhaust camshaft)
- Solenoid valve, hydraulic camshaft adjustment Faulty
-->(Mechanical fault or Electrical fault in circuit)

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.