KOEO codes.

[SASHO91]

Pulled them a minute ago...

stored codes...
157-MAF
542-seconadary fuel circuit

i was reading up on the 157.... seems like a dirty MAF could throw this... allthough im pretty sure mine is clean... i will clean it again...

and the 542... just blow that one off? thats what i can gather from other posts....

the codes are new.... as in when i replaced the W/P i had the Battery off for a day....

 

[SeanMc]

I blew off my 542 for a while. Decided to go get something to eat one day, car stalled and wouldn't start. It was fun pushing it 1/4 mile over speed bumps back to my house.

 

[SASHO91]

would that be fuel pump related? or a completly seperate circuit?

 

[etc1006]

Yeah, I'm kind curious now... I have 542 and 543, one is to the computer and the other is to ground IIRC...

 

[Rockledge]

542 and 543 are fuel pump circuit related. However, an MTX stall event can and often does trip a 542 code.

Both codes together would be more indicative of a true FP circuit problem. If one or both codes are present and the car seems to be running fine, then erase the codes and see if they comne back.

 

[SASHO91]

see, problem is... I dont recall stalling the car between now and when i replaced the w/p a few days ago....

would hard starting throw that code....

and im sure my hard starting has to do with my leaky cam seal.. (CID/Exhaust)