I have been running my cams for about two weeks now and im very happy with them except for these two codes that will not go away.

P0340-some thing about the camshaft sensor A curcuit.
P0420-no cat i believe.

can anyone help me out?
i have the test pipe on the car before the cams with out any CEL.
thanks justin

 

Might want to double check the bolt on the Camshaft sensor. Make sure it's nice and tight. But before doing that clear the code and see if you get it again. I can't see any harm if you get the code again to your motor.

 

P0340: Sounds like you forgot to plug in the cam sensor and tried cranking your engine. No biggie. The car won't run without a cam signal.
P0420: Your rear O2 sensor is reading a "dirty" exhaust flow fooling the ECU into thinking your cat is worn out. Get an O2 emulator

 

i did clear the codes with my datalogger, they came back on after a few miles. should i reset my ECU? the P0420 is bugging me because i got the helix test-pipe with mech. fix and it worked fine, untill the cams were installed. do you guys think its just the extra gas being released for the new cams?

 

stupid question: i wont screw up my reflash when i reset my ECU???? lol

 

The reflash will be fine with a reset! Good luck resolving the code.

 

With your cams installed your egt's go down which makes your exhaust flow cooler so this could be impacting your 02 signal to trigger the rear cell. The calibration is off. Just a thought right off the top of my head for that to all the sudden come on, if it comes back on after the reset.

 

double check if the asymetrical cup that gets connected to the end of the camshaft is 180 degree out of phase. the narrow extension on the cup should be pointing to 10 o'clock. also check the cam angle sensor ground wire.

hope this help.

-ob4

 

i have the 420 code with turbo back exhaust w/ Catco Cat, walbro 255, and intake

Any ideas?

 

is your reflash setup for the cams? or did you get it reflashed with the addition of the cams i mean
Dave

 

420 code?!? Oh wait... heh not that code.

Umm, if you're seeing a P0420 CEL then your rear O2 sensor is reading too much oxygen in the exhaust stream. Have you been flashed for the above mods?

 

the flash was done last. im happy to report that the cel has gone off for about 65 miles now. crossing my fingers. im still going to have my mech. look over the cam sensor soon. thanks guys