2003 GMC Sierra codes

2003 GMC SIERRA
90,000 MILES • V8 • 4WD • AUTOMATIC
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CHAD24FAN
  • MEMBER
  • 1 POST
Does a K&N Filter cause codes for the MAF sensor on engines?
Feb 15, 2010 at 3:44 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
no but if the duct is open due to a cut or open spot it would. It would be behind the MAF sensor that would cause it. Of course the MAF could be bad as well.
Feb 15, 2010 at 5:17 PM
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