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Check engine light on after MAF unplugged

smit303

By smit303
in Troubleshooting & Recalls

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smit303 Enthusiast

smit303

Posted
Posted

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 Senior Enthusiast

newdude

Posted
Posted

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 Enthusiast

smit303

Posted
  • Author
Posted

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 Senior Enthusiast

02suburbanZ71

Posted
Posted

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 Enthusiast

smit303

Posted
  • Author
Posted

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.

  • Like 1
crafferty Senior Enthusiast

crafferty

Posted
Posted

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

  • Like 1
pm26 Senior Enthusiast

pm26

Posted
Posted

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.

  • Like 1
fondupot Senior Enthusiast

fondupot

Posted
Posted (edited)

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 by fondupot
  • Like 2
  • 5 months later...
DAP56 Enthusiast

DAP56

Posted
Posted

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

  • 4 months later...
ajdata Enthusiast

ajdata

Posted
Posted

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

 

Sent from my Nexus 6P using Tapatalk

ajdata Enthusiast

ajdata

Posted
Posted

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

 

Sent from my Nexus 6P using Tapatalk

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

  • 3 years later...
hendersonc047 Enthusiast

hendersonc047

Posted
Posted

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?

  • 4 months later...
Blake A Hill New Member

Blake A Hill

Posted
Posted

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

  • 10 months later...

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