Question about 2004 Nissan Frontier

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2004 Nissan Frontier Service Engine Soon light came on

P0321 and P1456 are the codes that come up. I can't notice any difference in performance. What should I begin checking first and is it ok to continue driving this truck ?

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P0321 Ignition/Distributor Engine Speed Input Circuit Range/Performance. P1456 Leak Detected In EVAP Control System. Sounds like a vaccuum leak somewhere. I would clear these codes out and see if they come back first. Then if they do I would check to see if you have a vacuum line loose or broken off. If they codes stay off it would be ok to keep driving the truck, but if they came back I would definately get it looked at.

SIncerely,

JC

Posted on Nov 15, 2008

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