P1378

P1378

Diagnosis information - DME V8 DFI

Valve lift control cylinder X - small lift

NOTE:
- Diagnosis detects uneven running for the specified cylinder.
- Uneven running is calculated from the expected and actual crankshaft acceleration due to combustion.
- Uneven running is interpreted as a misfire or valve lift fault, depending on type.

Diagnostic conditions
- Full-load acceleration

Possible fault causes
- Fuel injector faulty or borderline
(opens too late / not long enough / not enough / leaking)
- Valve lifter of the specified cylinder faulty
(intake valve of the specified cylinder gets stuck during the small lift)