my itr had recently converted to b20/vtec. everything's fine except for engine check light. my mechanic checked the error code, it suggests few errors,
1. barometer error
2. idle control valve
3. throttle position error
but the engine's running fine. btw, its been converted to obd1. both obd1 & 2 gives the same error code.

checked my set-up below.

please help.

 

what head???? its prolly vacume lines from the ficv for number 2
number one get a multimeter and check it out if it does not work by just repluging it in.