Question about kooks/check engine light!!! - Cherokee SRT8 Forum
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post #1 of 14 (permalink) Old 04-07-2007, 03:22 PM Thread Starter
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Question about kooks/check engine light!!!

Hi guys my name is john and I live in williamsburg ,Va.I just had installed catless kooks headers and I have a dashhawk.I know I am going to throw some codes every 100 miles or so but I keep throwing Two different codes
every 30-40 miles.

The first one is for each of the cats.(witch is normal)

The second one is slow responce with 02 sensor.




Is this normal
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post #2 of 14 (permalink) Old 04-07-2007, 09:40 PM
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Re: Question about kooks/check engine light!!!

Not sure.. there are lots here with this experience good luck. Mine go on this week.

FASTmade Ediff & TCM switches, 170 Stant, B&B Catback, Dynamic Heads, FRE Hellfire Cam, Kooks LT's
ARIZONA SPEED & MARINE Vortech SuperCharger Kit, ASM Phenolic Spacers, UniChip,
B&G StageII, UniChip, Kenne Bell Boost a Pump, Walsh Racing Heat Exchanger.

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post #3 of 14 (permalink) Old 04-10-2007, 10:43 PM Thread Starter
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Red face Re: Question about kooks/check engine light!!!

The codes i keep throwingare:

po420-Cats

po153-heated oxygen sensorslow responce

po133- circuit slow responce

po128-unknown

I am just worried I will blow my motor from running the wrong way.

Please any insight???
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post #4 of 14 (permalink) Old 04-10-2007, 10:46 PM
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Re: Question about kooks/check engine light!!!

Quote:
Originally Posted by UDLOSE
The codes i keep throwingare:

po420-Cats

po153-heated oxygen sensorslow responce

po133- circuit slow responce

po128-unknown

I am just worried I will blow my motor from running the wrong way.

Please any insight???

The header/secondary 02 related MIL/CELs do absolutely nothing to performance, tuning, or your motor. They are simply an inconvenience.
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post #5 of 14 (permalink) Old 04-10-2007, 10:53 PM Thread Starter
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Re: Question about kooks/check engine light!!!

Thanks man I really appreciate your help.

Do you know what the po128 means?
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post #6 of 14 (permalink) Old 04-11-2007, 04:07 PM
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Re: Question about kooks/check engine light!!!

Quote:
Originally Posted by UDLOSE
Thanks man I really appreciate your help.

Do you know what the po128 means?

A quick google search said "code PO128; coolant temp below thermostat regulating temp"

Anthony


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post #7 of 14 (permalink) Old 04-11-2007, 04:13 PM
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Re: Question about kooks/check engine light!!!

dont worry guys.... i throw those codes too. just clear them. no harm done just a pain in the a$$

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post #8 of 14 (permalink) Old 04-11-2007, 04:44 PM
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Re: Question about kooks/check engine light!!!

Quote:
Originally Posted by UDLOSE
The codes i keep throwingare:

po420-Cats

po153-heated oxygen sensorslow responce

po133- circuit slow responce

po128-unknown

I am just worried I will blow my motor from running the wrong way.

Please any insight???
Mine throws PO420 & PO430 "Inefficient catalytics"...thats it.

PO153 may indicate the heated sensor is not coming up fast enough. We have heated or self heating 02 sensors that bring it up to temp for quicker warm ups. You may have a bad 02........ or did you happen to install the 02 sensor bung spacer?? If so that could be the problem.
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post #9 of 14 (permalink) Old 04-11-2007, 06:27 PM Thread Starter
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Re: Question about kooks/check engine light!!!

Will this hurt anything or just throw a light??
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post #10 of 14 (permalink) Old 04-11-2007, 06:57 PM
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Re: Question about kooks/check engine light!!!

Quote:
Originally Posted by UDLOSE
Will this hurt anything or just throw a light??
From what I have seen it may cause some slight fuel/air adjustment......but remember the ECU will never let it run much outside of federal emission standards.

If anything when we install headers....cams...heads.....the ecu will always take the engine management back to baseline......so no you wont melt a piston or burn a valve.

If nothing else see if you have a spacer in the 02 sensor bung. Check the 02 sensor.....you might have a bad heater on one of them.
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