help me troubleshoot

[jick.cejoco]

need a suggestion what is the possible problem of nissan patrol 3.0di 2005 model when i start the engine there's a noisy sound like fuel knock and also it has a check engine, what is the possible problem?

ado,
does it have thick black smoke coming off the tail pipe when youfirst start and the noise is heard?
jick

[speed unlimited]

Regarding the power lock Check the actuator malfunction or busted inside the left panel of the door and check wire connection.