I can't remember if I told you guys this in the past threads but i'm also still having a problem with a 02 heater circuit code. p0135. I can't figure it out. I've bought 3 02 sensors and all anyone can tell me is that it is an 02 problem. I had it diagnosed and that guy told me to buy one from jeep(cost a pretty penny). I'm lost. I feel i can't move forward without that fixed. Air sierra never had this problem so I'm guessing that it isn't because of not having the pre-cat. i'm still trying to figure out the intercooler as well. and i already have bigger injectors. 27# vs. 22#. i can smell how rich it is when i'm idling.
Thoughts? Ideas?
P0135 Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) - not sure why you would get that, maybe a bad ground but dunno to be honest.
if it runs rich at idle is either the O2 sensor or you should get a too large afr correction factor error code (means the PCM cannot adjust the afr that much, so the fuel trim is outside the acceptable range) - one thing is to do a full computer reset (not sure how you do it on your year of vehicle), the other thing is the FTC1 will allow you to adjust the MAP sensor output to match the required fuel quantity (tricking the PCM in thinking it needs less fuel by reporting a lower MAP reading) and in that case the fuel trim should come back within the normal range.
EDIT: an ODB2 scanner will allow you to monitor the fuel trims, that is one of the ways the Split Second recommends tuning your unit - check the Underdog Racing Development engine tuning guide on their site.
