I just bought a 600 and it's idling too high. Cold-start is at 3000 RPMs and idle temp is at 4000 RPMs. I've messed with the throttle cable and still still not lower than 3000 RPM. Red light is on along with F1 code c22. That's the atmospheric pressure sensor. Would a bad AP sensor cause it to run at high RPMs? It has a D&D Exhaust. Should I buy a power commander or will the AP sensor fix the problem?