P0136 & P0156 - After New Sensors

[281CI96Coupe]

Yeah, I am having a weird problem with the car. It drives strong, doesn't suck up gas most days, i guess since it been mid 20's and 30's. Everything seems great, but I am getting these rear sensor codes. I dont know what gives? I dont know if my UPR catted X is giving me problems, but I had the same type of code before with the old sensors on the new pipe as well but it was only 136.

My conclusion is that, either my MAF might be dirty and the mixture of Air to Fuel could be slightly off, or the pipe is letting to much raw gas get pass the hi-flow cats which is setting off these codes. I haven't clean the connection of the pig tail connections on both sides, but these are the only thing I can think of. The car is strong, good throttle response not sluggish, just keep giving me a CEL.

On a side note, when the light is turned off, it takes a while for it to come back. It doesn't come on the next day.
P0136 Downstream Heated Oxygen Sensor circuit fault - Bank No. 1.
P0156 Downstream Heated Oxygen Sensor circuit fault - Bank No. 2.








-Nate

 

[nyuk98gt]

281CI96Coupe:

Solution: MIL eliminators! The cats are not getting hot enough to satisfy the minimum limit of the downstream O2 sensors. This is often a problem with aftermarket catted pipes. M/E's will fix that problem and it won't come back. (If you search for Bassani and CEL you'll find some threads on this topic. No flame intended towards the Bassani owners, just posting what I have read over the years).

HTH,

Chris

 

[281CI96Coupe]

I thought that too, but the MIL's i had with the pipe was making car run too rich. Or maybe should i just get Steeda MIL's? I had the generic UPR MIL's.

 

[Notchbck93]

So who makes a good MIL eliminator that won't cause future problems and other stang bangers have logged a fair sum of miles with good results?

 

[281CI96Coupe]

I heard praises about steeda.