Engine warning light on after head gasket changed

[thechod]

Hi

on an avensis verso vvti gls 53 plate (2 litre petrol automatic)

after changing head gasket engine warning light is on constant and when accelerating it flashes

seems to drive well but maybe a little more vibration through steering wheel at idle

what could be the cause?

 

 

[HartmannX]

Talk to the person that changed the headgasket. And read out the error codes is first step...

 

Sendt fra min SM-G920F med Tapatalk

 

 

[thechod]

in process of getting error codes .

 

[thechod]

well it seems i have air fuel ratio error codes on  both banks, sensor 1's and had one for misfire on cylinder 4 

so 2 new a/f sensors and one new coil pack 

 

 

[thechod]

while im here,

do i have to ever chainge the timing chain

 or

how often do i have to inspect it

would i inspect it via listening or opening cylinder head 

and how often to change automatic gearbox oil