Check engine light with K&N Typhoon CAI - ModernCamaro.com - 5th Generation Camaro Enthusiasts
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post #1 of 10 Old 06-20-2013, 11:01 AM Thread Starter
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Check engine light with K&N Typhoon CAI

Just installed a K&N Typhoon CAI on my 2010 v6 LS with 46k miles and after running it for about a week the check engine light has come on. No other mods or tune (yet). Any ideas or is because of the CAI?
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post #2 of 10 Old 06-20-2013, 12:11 PM
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Yes...it's your CAI...K&Ns are well known for throwing CELs.
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post #3 of 10 Old 06-21-2013, 05:09 AM
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Make sure your MAF is not covered in oil from the filter and make sure you have it in the correct way, sometimes people install them facing the wrong way.

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post #4 of 10 Old 06-21-2013, 05:51 AM Thread Starter
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Took it to auto zone to get the code read. P0449 evaporative emmission system was the code. They suggested the gas cap wasnt on tight, but it was/is. Any suggestion?
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post #5 of 10 Old 06-21-2013, 06:34 AM
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Emission issues should be covered under warranty.

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post #6 of 10 Old 06-22-2013, 06:12 AM
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Quote:
Originally Posted by NavyRT View Post
Took it to auto zone to get the code read. P0449 evaporative emmission system was the code. They suggested the gas cap wasnt on tight, but it was/is. Any suggestion?

More likely a bad vent solenoid. Test the circuit for high resistance.

"P0449

The ECM detects the voltage on the EVAP canister vent valve control circuit is between 2.64.6 volts when the driver is commanded OFF. The condition exists for less than 4 seconds or for a cumulative of 30 seconds.
"

I would bet that vent noid is internally shorted across its coil. But its also possible there is a short to a 5v ref line or the PCM is internally bad, but those two are more unlikely.

If its the vent solenoid or wiring, that will be covered under the bumper to bumper (3yr/36k).
If the PCM is at fault, then its covered under 8/80 with the emission warranty.

Last edited by S.Bretz; 06-22-2013 at 06:21 AM.
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post #7 of 10 Old 06-22-2013, 06:22 AM
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If you can access the vent solenoid, it should ohm out in the 20-24 range. If it anything outside that window, then replace it.


You can disconnect the PCM X1 connector and check resistance between pin 19 and the F32U fuse in the underhood junction block (fuse block). It will be a red 10amp fuse. DO NOT JAMM ANYTHING DOWN INTO THE PCM CONNECTOR. YOU WILL WOLLOW OUT THE CONNECTOR. Snip off the lead of a resistor or stick a few STRANDS of wire down there is you do not have the proper probe tool. What ever you stick down there should have little to no resistance sliding in.

Here is a pin out of the X1 connector for the LLT


Last edited by S.Bretz; 06-22-2013 at 06:31 AM.
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post #8 of 10 Old 06-22-2013, 06:40 AM
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Quote:
Originally Posted by Strick View Post
Emission issues should be covered under warranty.

There are few classifications for emissions coverage. For the purpose of the general passenger car, there are two that qualify. E and E2.

E coverage is 2yr/24k miles (or until the bumper to bumper has ended).

E2 is the 8 yr/80k mile warranty. This only covers cat converters and PCM/ECM's....that's it.

Anything emissions related that is not a cat or ecm is covered under 'E.' All evap stuff is covered under 'E;' so that warranty is only good for up to 3yr/36k.
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post #9 of 10 Old 07-14-2013, 05:55 PM
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Quote:
Originally Posted by Envy View Post
Yes...it's your CAI...K&Ns are well known for throwing CELs.
When properly installed at an authorized dealer, doesn't K&N guarantee that their products will not cause CEL's. I thought that they are designed for the specific car they are sold for.
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post #10 of 10 Old 07-14-2013, 06:37 PM
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I don't think the code thrown has anything to do with the K&N... S Bretz has given some great info to test the "problem"...

I would just clear the code and see if it comes back. If you really feel it's the K&N, put the stock air intake back on and drive around for a while and see if it comes back, if not put the K&N back on and see if it turns on again... The K&N should not throw that kind of code. I would expect to see a lean condition code if anything.


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