116622/P0238/000568 - Manifold Pressure/Boost Sensor (G31): Signal too High
16490/P0106/000262 - Manifold / Barometric Pressure Sensor (G71) / (F96): Implausible Signal
16712/P0328/000808 - Knock Sensor 1 (G61): Signal too High


These are my codes, I have noticed a boost about 5psi low and vacuum a few Hg off too, and when I turn on my AC the vacuum gets worse. No check engine light though. I tried testing for a boost leak, and heard a hiss but on the front left of the motor but could not locate it precisely. I cranked the car with with no MAF to test it and it ran ultra rough, and I turned off imediatly. any help
3 weeks ago i replaced a knock sensor, but havent had any codes from it since.

 

I am guessing this is a Map sensor failing, any good way to test this?

 

It sure looks like a MAP sensor problem, or an intake line came loose. Check all the lines by tugging on them, if they are all snug. Then replace the MAP.

 

Found an intake line that was loose, had no clamp, I put one on it, cleared codes and drove yesterday. No more code, but my vacuum is still wonky when i put my ac on full blast. (14-15hg) and boost pressure hits goes to 18 not 20 like normal and doesnt really hold, seems like it is spooling slow. I need to get the system smoked to find the leaks. I feel like its leaking, and I have this honk after releasing accelerator, I thought it was my dv, but it still happened after I replaced it with a apr r1 dv.