P0030 and p0135 after header install

[Tony_z]

So yeah like the thread title says I got codes p0030 and p0135 after header install. Is this common I have cleared them and they won't come back unless I start the car when it's cold. Any ideas it did have code p0053 also but that didn't come back after I checked wires . Could a upstream o2 gone bad ?

[Steve1018]

Is the engine misfiring? If it is check all of your plug wires or it is possible a plug got damaged during install. As for the P0135, Drivers upstream 02 heater circuit either got damaged, you have a bad harness extension or the 02 sensor is damaged/faulty

[Tony_z]

Car runs with no misfires but I just got a tune and seems that while idling for a while at a stop it'll start feeling like it wants to bog down I've check the o2 extensions for burns or damage but they are good . It it possible the o2 could've been damaged from the header install. Would a p0030 be caused by a spark plug?
Could it be possible the o2 extension is bad?

[Steve1018]

P0300 is a misfire code, if it isn't currently misfiring it could just be a stored history code. You would need a scan tool to see misfire data to verify.

If you have a test light unplug the sensor and put the light across the Grey/White and Pink/Black wires on the vehicle side. Turn the key on and see if the light comes on. If it does you have a bad sensor, if not you have a harness problem, a popped O2 heater fuse, or in rare cases a bad PCM

[Tony_z]

No not p0300 it's p0030 it's a same type of code 02 bank 1 sensor 1

[Steve1018]

My bad, I did read that wrong. It is another code due to the heater circuit. Same test will find it.

[Tony_z]

Thanks for the response I'll give that a try tomorrow . Is it common for an o2 to go bad from a header install ? Or do you happen to know what codes lt headers usually spit out

[Steve1018]

No problem. The only codes the headers alone usually cause are insufficient activity codes, that is fixed with tuning. These codes are a hard circuit fault, if I had to guess a wire got damaged somewhere during install.

[Steve1018]

Originally Posted by dynosteve

Tune fixes all of this sir

A tune deletes the upstream heater circuits?

[Tony_z]

That's a good question

[Tony_z]

Originally Posted by dynosteve

no only the downstream, the up stream always have to stay functional no matter what, if you have a up stream sensor coding fault you will have either a connection issue or a 02 sensor gone bad or a bad hego warmer curcuit or fuse, i have also seen over the years people get the passenger and drivers side swapped by mistake as well

Oh ok so there different parts I'll check that out