Common OBDII codes after swap

magnummopar said
not if you have the pcm correctly flashed to turn off extra O2 sensors, emissions and leak detection pump.

You are now running in "limp home" mode, which causes the pcm to stay in open loop ie no O2 control, so you will get lower HP, MPG and a host of other issues. You will need a speed sensor and flash to remove O2 heater relay codes.

Doubt if O2 codes are from oil leak, that would give you a code of O2 volts low, not high. Your pcm must be a CA spec rather than Fed spec. Really surprised you dont have LDP code, Evap leak code and batt temp code...possibly not setting them due to O2 codes keeping it from closed loop. It might not set emissions codes until it coes into closed loop, depending on what year pcm is.

Yes, We're talking about 5.9L swap and what specific codes people have after a magnum swap, not what do codes mean. I can look those up all day long on google.

Wouldn't limp mode make it not shift? or is there more than one kind of limp mode?

I have all 3 o2 sensors installed. One on each side after the manifolds and one downstream ( after the non existent cat ) I'm beginning to wonder if I didn't wire in the 3rd o2 sensor wrong ( I had to extend the wires to reach where I wanted to put it ) maybe I'll just unplug it for now and see how it behaves....did a little research...that p0144 code is sensor shorted to voltage, AND I just looked at it on the car and it IS wired correctly...now I have to go "skinned wire hunting" UGH

From what I've read, the PCM doesn't need the vehicle speed sensor, it uses the output speed sensor in the middle of the trans. The only issue I ever had with the trans is when I forgot to plug in the output sensor during initial testing.

Does it need the VSS for closed loop operation? if so, that's gonna be a deal breaker for closed loop mode unless I can figure out how to use the speed sensor from the 8.8 rear :lol:

Does the after cat sensor problem force it to stay in open loop? I thought only the front 2 controlled that and the #3 was there for cat efficiency readings...

PCM is Fed spec but did have it flashed by the guy in Lantana FL to remove the security. I told him what I was doing with the setup and he said no problem.