MY AIRBAG LIGHT AND CHECK ENGINE LIGHT RECENTLY ...

  • Tiny
  • tiajohnson
  • 2006 Nissan Titan
  • 114,236 miles

My Airbag light and check engine light recently came on in my truck. I took it to be diagnostic and 2 codes came up. P0240 (Threshold Bank1) and P0430 (Threshold Bank2). Can you let me know what that means please? Thank you in advance.

Friday, December 7th, 2012 AT 3:59 PM

4 Answers

  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,717 posts

It is an indicator that the fuel/air mixture or ratio is at the limit of what the engineers have determined safe for that platform. It may be caused by an intake air leak or some other issue that would skew the mixture. Fuel trim numbers should indicate the addition or subtraction of fuel from the mixture and help begin the diagnosis.

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Friday, December 7th, 2012 AT 4:08 PM
  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,717 posts

http://www.2carpros.com/trouble_codes/obd2/P0200
http://www.2carpros.com/trouble_codes/obd2/P0400

I answered with a knee jerk and after researching these codes I found the first to be for turbocharger boost sensor and the other for catalytic converter efficiency, see the above links

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Friday, December 7th, 2012 AT 4:14 PM
  • Tiny
  • tiajohnson
  • Member

Can it be sensors. And do you know where it would be located on the truck?

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Friday, December 7th, 2012 AT 4:29 PM
  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,717 posts

I believe the fault codes present are possibly only partially correct as the car is not turbocharged. And the cat converter code could be a one time only thing. Clear the faults and see if they return.

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Friday, December 7th, 2012 AT 4:36 PM

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