how do i reset the check engine light after the fix

5

Asked by Nov 01, 2015 at 12:48 PM about the 2004 Ford F-150 Lariat SuperCrew

Question type: Maintenance & Repair

12 Answers

495

Bi-directional scanner

2 of 2 people found this helpful.
100,345

A scan tool is the easiest way, but you can also reset it by removing all of the ECM and KAM fuses for a few minutes before putting them back in, you will loose any presents you may have made like radio stations etc. The 3rd way is to disconnect a battery cable, and wait a few minutes before putting it back on, but people have had problems with newer vehicles turning on the antithieft systems, so if you opt for this plan make sure you know how to deactivate it before hand. HTH

1 of 1 people found this helpful.
70,255

If the repairs solved the problem the light will go out on it's own. To speed up this process keep your gas tank between 3/4 and 1/4 full. No more and no less. That way the computer can run all the diagnostics. If it's still on after a week of normal driving there's something else going on. HTH. -Jim

1 of 1 people found this helpful.
20,160

If you purchased the part at a national auto parts chain, they have bi-directional scanners. Just ask them to clear all the codes.

1 of 1 people found this helpful.
495

Disconnecting all the electricity to an ECM will never "erase" codes in an OBD-2 system. A lightning bolt might do it, if it's a direct hit, but modern ECMs are designed to not allow any owner or parts house to do it without a bi-directional scanner. The last ECMs that dumped data by disconnecting the battery were the old systems that were pretty much fazed out around 1994-5.

5 of 5 people found this helpful.
100,345

I have to disagree with you there JPV, even my 05 Yukon will reset back to factory settings if all the power is removed and allowed to sit for a few minutes, I have even rechecked with my scanner just to make sure the codes are gone, but a scanner is still the best way to do it.

495

I see. Kinda odd though.... not disbelieving you, but I've been an MVPC/INSTALLER-INSPECTOR in California for many years ... over 47 ... and this as been debated a lot. However, having never seen that happen myself, and not had any close associates say they saw it either. .........., makes me wonder why this might not be able to replicate on any vehicles I worked on in days past. I just finished a '98 Suburban today that the customer repeatedly tried to erase his codes like that. It didn't work for him either, but i'm keeping a slightly open mind on this yet

1 of 1 people found this helpful.
100,345

JPV the biggest mistake they make is not removing the KAM power so the code stays put.

1 of 1 people found this helpful.
70

I have a 2002 f150 my eng. lighte keeps come on what wood it be

7 of 7 people found this helpful.
15

my f150 4.6 check engine light stays on. sometimes it flashes while driving on the highway. I know it's a misfire. I am considering changing the spark plugs. has anyone else had this issue? Did changing the spark plugs work?

1 of 1 people found this helpful.
10

If its flashing, it means its a major misfire. Could be the plugs, but doubtful. Is more than likely a shot ignition coil or a bad injector. Seeing as how we dont have distributors.

1 of 1 people found this helpful.

My 09 f150 was doing the same thing until a few min ago. It needed new pugs. Ichanged the plugs and woohoo!!! No ore skip while accelerating. No more flashing eng light. now, i just need to get the eng light turne off.

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 183,060 nationwide F-150 listings starting at $1,000.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    8,930
  • #2
    dandyoun
    Reputation
    4,540
  • #3
    tennisshoes
    Reputation
    3,060
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,125 Great Deals out of 167,340 listings starting at $1,995
Used GMC Sierra 1500
900 Great Deals out of 65,452 listings starting at $1,995
Used Ford F-250 Super Duty
378 Great Deals out of 44,647 listings starting at $1,799
Used Dodge Ram 1500
371 Great Deals out of 10,941 listings starting at $1,500
Used Toyota Tundra
463 Great Deals out of 32,298 listings starting at $1,999
Used Toyota Tacoma
620 Great Deals out of 42,904 listings starting at $1,500
Used Ford Mustang
730 Great Deals out of 38,316 listings starting at $895
Used Nissan Titan
201 Great Deals out of 19,847 listings starting at $3,495
Used Chevrolet Colorado
277 Great Deals out of 31,498 listings starting at $1,995
Used Chevrolet Silverado 2500HD
313 Great Deals out of 29,149 listings starting at $2,995
Used Ford F-350 Super Duty
312 Great Deals out of 24,103 listings starting at $2,488
Used Chevrolet Tahoe
652 Great Deals out of 39,508 listings starting at $1,000
Used Ford Explorer
857 Great Deals out of 63,389 listings starting at $995

Used Cars For Sale

2018 Ford F-150 Lariat SuperCrew For Sale
211 listings starting at $38,884
2017 Ford F-150 Lariat SuperCrew For Sale
3 Great Deals out of 1,160 listings starting at $33,360
2016 Ford F-150 Lariat SuperCrew For Sale
113 listings starting at $32,995
2015 Ford F-150 Lariat SuperCrew For Sale
9 Great Deals out of 267 listings starting at $30,995
2014 Ford F-150 Lariat SuperCrew For Sale
9 Great Deals out of 150 listings starting at $16,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.