eat light

Dont know if anyone has any idea what my problem may ne but here what happening-

-engine and trans light keep coming on randomly can stay on gor a min or 2 but some some times 20 mins, normally switching engine off then on clears light but some times reappear minuites later

- cars very revvy but their seem to be a flat spot between 2,5-3k that getting worse

-Very slugish to turn over and start in the morning even if you wait
for glow plug light to go out

Any suggestions will be of help

Also with fault codes show up on a reader even if lights not on???

Gareth

out