[jsteves1313]

I recently pulled the codes for my check engine light problem and they were:

po135, po141, po155, po161- o2 heater circuit malfuntion, both banks and sensors. These codes were pulled when I had a stock exhaust on. I just purchase a pypes "the beast" exhaust. What do I have to do to get rid of these codes with this exhaust?

po403- Exhaust Gas Recirculation Circuit Malfunction. Do I have to buy a new EGR valve or is it something else regarding the circuit?

po446-Evaporative Emission Control System Vent Control Circuit Malfunction.
po443-Evaporative Emission Control System Purge Control Valve Circuit Malfunction . I have no idea what these codes mean or do. If anyone has any ideas on how to get rid of all these codes, please let me know. Thanks!!

[Stang6899]

Get a SCT tuner and turn off the o2 sensor

[Stang6899]

Ok I lied you can fix it by getting a tuner but you can also fix it by getting a 24" o2 sensor extensions. Read the what it says at the bottom of the product.


http://www.pypesexhaust.com/sys-mustang.html

[99mustang232]

the evap purge valves are notorious for failure, if you do a couple of searches on here you should come across some good posts....

[AtlanticBlue99]

Did you replace all of the oxygen sensors? These are common maintenance codes. Just replace bad parts with new ones.

Originally Posted by Stang6899 Ok I lied you can fix it by getting a tuner but you can also fix it by getting a 24" o2 sensor extensions. Read the what it says at the bottom of the product.

that would in no way help his problem. he does not need O2 extenders, he needs MIL Eliminators to correct sense the voltage of the rear pair of O2 sensors. the front pair only require O2 Extenders on a LT headers setup.

Get MIL eliminators or a tune to turn off the rear pair since you have no cats. Then listen to 99mustang232 about the evap purge valve.