p0455

I just purchased a 2000 4.0 TJ that had its catayltic converter and muffler stolen. The previous owner added a glass pack muffler and did not replace the catalytic converter. One CEL code (P0455) is showing when I scan. I replaced the gas cap since the oring was very cracked and the CEL is...

So i replaced my o2 sensors with the NGK sensors about 7k miles ago. Didn’t have codes for a while, but just checked it today and I’m pulling codes P0031, p0051, & p0136 (all related to o2 sensors). I’m also pulling codes for p0303 (cylinder 3 misfire) and p0455 (evaporation emission system...

Hi. New to the forum. Purchase used 2001 Wrangler SE 2,5L 5 speed. 106K miles. CEL was on but I guess I overlooked since the body and frame were solid. Issue: Very rough idle when cold. Gets a little better when warm. Auto zone CEL codes are P0303, P0132, P0304, P0138, P0455, P0303...

My 2001 TJ (4.0L) gave me a "P0455 Evaporative Emission Control System Leak Detected (gross leak)" code yesterday. It happened about 10 minutes into a drive. I had driven the vehicle about a half tank since the last fill-up. The gas cap was secured (it's old so it might have worn out and need to...