: '02 Seville was running fine, now it's not ?

05-05-14, 08:34 PM
I have an '02 Seville with 118K NorthStar. It was running fine, then all of a sudden the next time I started it it just about jumped out of the car ! Started lobbing bad, then idled really high ( 2500 RPM ) threw codes P 0101, 0121, 0300, & possibly 0301. Tried cleaning the MAF sensor & IAC, to no avail, Any help, would be greatly appreciated,

Thanks in advance.

05-05-14, 09:05 PM
Codes without their definitions don't tell us very much. No one has them memorized. Help us help you and always post them along with the codes.

05-07-14, 09:22 AM
Sorry about that. The good thing is that I found the problem. It was the coupler that goes between the throttle body & intake. About an hour & a half to change it & she purrs like a kitten. Problem solved !

05-07-14, 09:27 AM
Plenum duct. Common issue.