I'm trying to start up an NA VX220 after som modifications.
I have checked all connectors and sprayed them with electronic cleaner but I still get the error codes P1515 and P1523 and the engine won't run.
I got this occasionally before too.
I need to mention that the writing harness was taken out, and in again.
Also checked the ground on the ECU.
Anybody have a clue ?
Something is also making a boxing sound in the engine bay sometimes.
Appreciate all help :-D