hey guys today i got my car and took it out to go to the hangouts as i do. im driving on the freeway and suddengly i decide to step on it as i do im in the middle of the run as i notice a light goes on i let go and its the service engine soon light i was like great what now i was driving it in full AT mode which i never do anyways my revs start to move up and down as i switch from full AT to manual mode i had install my test pipes like two weeks ago but nothing happened when i got them installed it was running great what do you guys think it is NEED HELP REALLY BAD PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

The SES light is probably unrelated to moving your AT from the auto to manual mode or vica versa. The change in rpm is because the AT will change gears from D (5th) in the auto mode to 4th in the manual mode at freeway speeds.

 

Ok thanks and about the lights do u think is the test pipes i got them installed at least 2 week to 3 weeks ago do u think that might be the issue with them.

 

Some people do have probs with tests and lights. Just buy and install some spark plug non-foulers. You will have to drill out the hole in them and that should fix your problem. I can't remember the hole size. Do a search on here for the non-fouler and you will find the post.

 

I got them but the thing is that when i took it to the guy the idiot didnt install them and he said it would be ok now i have to install them ill see what i do. I took it out already the codes where P0 420 two of them and then a P0430 it said Catalyst efficency threshold bank 1 for P0420 and bank 2 for P0430. Is that what does code mean.

 

P0420 = THREE WAY CATALYST SYS - BANK 1
P0430 = THREE WAY CATALYST SYS - BANK 2

DTC P0420, P0430 THREE WAY CATALYST FUNCTION

The ECM monitors the switching frequency ratio of air fuel ratio (A/F) sensor 1 and heated oxygen sensor 2 (or heated oxygen sensors 1 and 2 for 2003 & early 2004 engines).

A three way catalyst 1 with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.

When the frequency ratio of air fuel ratio (A/F) sensor 1 and heated oxygen sensor 2 (or heated oxygen sensors 1 and 2) approaches a specified limit value, the three way catalyst 1 malfunction is diagnosed.