CEL is on (code 27), HEAVY steering, ABS light is on, will not shift out of park without using the override, AC blows cool/warm. All of this has happened after I took out the IAC and cleaned it. Before I cleaned it no ABS light, could shift out of park, and the steering was normal, BUT the trac light was on, code 27, same AC problem. Am I looking in the right direction at the IAC? I don't see how an o2 sensor (code 27) could be causing all these problems. ANY help would be appreciated