I recently discovered that my check engine light had no bulb into the cluster.

Anyway, when i did the check engine codes procedure 2 codes came out ... a code 38 and a code 54

For the 38 ... i donno what it is ... anyone have any idea ? couldn`t find it in my code list.
As for the code 54 ... i found out my Crackshaft Speed Fluctuation sensor was not there ... when checking with my mechanic .. he said that my engine does not take this particualr sensor !
His opinion is that either the ECU or the engine have been replaced ...

Any ideas about the above probs guys ?? Helppp me switch that engine check light off !!

Cheers