CEL code P0172
 

Okay, so yesterday I started my car up after work and I got a cel. I pulled the codes this morning and I am getting code P0172 and another code. I forgot to write the other code down and I am at work right now, so I will get the other code this evening to help diagnose the issue(s) (hopefully it's related).

The filter is almost brand new, with less than 1500 miles on it. It's part of my AEM Intake setup. Only other engine mode I have is a header-back exhaust (Invidia catted front pipe and FT86SF V2 cat-back). I have had the catback part of the exhaust on there for about 2 months now, while the front pipe has only been on for about a month. Unless an O2 sensor has gone bad, I can't see the exhaust causing an issue.

Any ideas?

@whitefrs is this the camshaft position sensor code?? I can't remember

According to Torque it's the "System is too rich" code.

camshaft position codes are P03 numbers

your right you are too rich..do you have a tune? or you just bolted everything on?

Bolted everything on, but if anything, the intake should result in >= airflow, and I can't imagine the exhaust would make the car run rich enough to warrant a CEL. Plus, it's been over a month since the last bit of exhaust work. If that was the culprit, wouldn't I have seen a CEL sooner? Regardless, a tune is in the works, so yea... Should I just wait for the tune and not worry about it?

i would go through a process of finding out the problem first put the stock intake on see if it comes back on then switch it back, disconnect the battery restart the system, make sure everything else is on right etc etc, but ya its odd that its running rich i would understand lean more than rich? if not when they tune im sure when they plug it in they will see whats going on? just my opinion

In teh end, the stock intake is probably better anyway, so might as well throw it on and see what happens. I'll do that this evening after work. thanks. =)

EDIT: It will probably be a few months before a tune is in order. At least it's running rich and not lean, so it's not really hurting anything.

hurting your fuel economy lol

While >= airflow is possible, if the MAF sensor scaling is not correct it doesn't know how to properly interpret that airflow and may be reading more airflow then is actually entering the engine making it run rich. This is why putting an aftermarket intake on a MAF tuned car is a gamble.

I see... Well, i pulled the second code. Its P117B. Cant find anything on this code. Any ideas?

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Rich can overheat your cat. Exhaust tuning can definitely affect O2 content of exhaust gas due to pulse effects. If your header is pulling exhaust out less efficiently than the ECU expects you can run rich.

did you go back to stock airbox? just go back to stock airbox and try out like a TRD air filter drop in, best advice I can give ya
or get tuned for your setup!

P117B (Fuel System Abnormal (Di))

Hope this helps. From what I have seen, that code is coming up for people with an aftermarket intake.