I have a 97 GSR with only 29k miles. I went to go do a vehicle inspections test and didn't get very far.

Fault Codes: P0453
Description: -
P0453: Evaporative Emission Control System Pressure Sensor High Input.

I thought I would pass it no problem, but I was shocked when I got stuck with a fail so fast. Some guy told me it might be because of my Aftermarket Exhaust. The only mod I know of thats on it is a RS-Akimoto Short Ram intake. And the wiring has been messed with since there was a tachometer in the car before.

Any help would be appreciated. Thanks in advance.