DIY: check engine / service engine soon light from HFC fix
 

Step by step on how to get rid of check engine/service engine soon light after installing high flow cats or test pipes.

-purchase spark plug anti foulers at your local auto parts store
-will need 4 total 2 for each sensor
-18 mm size
-made by HELP brand / part number 42002

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-disconnect the negative terminal on your battery
-take one of the anti foulers and drill out its center using a 1/2 bit
-this will increase its hole size and allow your stock o2 sensor to fit

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-when finished this is what it will look like

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-side by side comparison of the original and now modified non foulers

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-screw the drilled spark plug anti-fouler on top of the original
-be sure to use some kind of anti-seize on the treads. in case you need to remove your fix with ease

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-unscrew your stock o2 sensor and place your cel / ses fix in
-use anti seize on the threads


-o2 Sensor inserted in the modified non fouler

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-unmodified non fouler now installed on modified non fouler

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-original non fouler->Modified non fouler->o2 sensor

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-reinstall your o2 sensor
-reconnect your battery and do a ecu reset

Nice write up :biggthumpup:

Staff, please move this to the DIY thread.

nice detailed write up suby, do check back in about of week of driving and let know if anymore CEL plz. now i MIGHT consider getting some HFC's and the cobb with stage2 map which supports hfc, catback and intakes!!

i had that for over 6 months now and its allllllllll good, first i had just one and it came back every 500-1000 miles just reset and it was good for a month or so, but then i heard about doing two of them and like i said 6 months++ and no problems. and hope it stays that way.

nice thanks for that. also do you have any hesitation problems and such due to the HFC like some others had?

Nice!! and Thanks for DIY.Wow, Sticky plz!!!!!!!!!!!

Lucky I have no CEL light on mine BERK yet.It's been over 1 yr and 2 months now.I will keep mine finger cross.:biggthumpup:

^ mine's only been on for a month, so far no problems but I don't want to have to try and source those here

Same here

good to know, quick question went to discount auto n they have this product 18mm in size but part #42009... Does that make a difference or can i still buy it? Also is it ok to drive with the service engine soon light on?

Stillen sent me the spacers for free after my SES light came on.

yup you gotta call and complain to still and they will send them to you. i think they should already include it with the hfc. but just another way they are trying to cut back, but the stillen one still caused a ses light for my car. so i found this way that works.

good info! thanks.

Good stuff I just installed my berk hfc last week and my engine light is on ima try this when I have time thanks for the diy

Was hesitant to buy HFC's but thanks a bunch for this write up