Check engine light on after MAF unplugged

[smit303]

I pulled air box and disconnected MAF to change headlight bulbs. Now getting check engine light. Will this clear by itself with time, or should I disconnect battery? Will I lose settings by doing this? Wll the truck run crappy for a while? Thanks for any help.

[newdude]

Dumb response but is the plug plugged in all the way? Sometimes if there is a tension issue on the connector it can cause a check engine light.

[smit303]

Yea, I checked and rechecked plug. Will Advanced Auto or somebody like that check and reset light. I'm sure it's because I turned ignition on to check headlights while it was still unplugged.

[02suburbanZ71]

They can scan the code. Try to unplug the battery for 30 min or hold the 2 battery cables together for 30 seconds. Re check all the clamps and unplug the cable and plug it back in

[smit303]

I just started it back up before I tried to the battery unplug, and the check engine light is off. Hopefully it's off for good. Thanks for your help.

[crafferty]

For future reference advance auto parts can reset your codes if they have the right scanner at that particular store.

[pm26]

Beware that on some vehicles (e,g, late 90's Nissans) you cannot clear the engine check light just by disconnecting the battery. It can only be done with a scanner. And that's always the preferable way.

[fondupot]

I had this happen too when I was replacing a headlight a while back. Had to remove the airbox. Was scared I broke the sensor. Had my dealer check it out and said all is fine and they cleared the code.

Edited March 30, 2015 by fondupot

[DAP56]

Mine just came on too following the headlight bulb swap. Hopefully it will clear itself. Man, those sensors are sensitive. Lol

[Silver ice 6.2]

Disconnect the negative cable from the battery first before unplugging wires or sensors

[ajdata]

What was the consensus here? I just replaced my headlights and have the same MAF sensor error

 

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[ajdata]

What was the consensus here? I just replaced my headlights and have the same MAF sensor error

 

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FYI After driving about 10 to 15 miles the light reset itself.

[hendersonc047]

I just replaced my headlights and the engine light came on.... everything is put back together, checked it twice. Can I wait a day to see if it turns off before taking it in?

[Blake A Hill]

Man thanks so much for starting at the red guys. I know it's been a long ass time but I just did the same exact thing and my check engine light is on. I also turn the key to on to check the headlights while the thing was unplugged. I'm expecting it to clear and if it doesn't after a little bit then I will take it to get cleared at AutoZone

[Joseph Griego]

Hi  I just changed my light bulb in my 2015 silverado and my check engine light came on