2000 Nissan Frontier Engine hesitation on warm-up

Tiny
FUSION
  • MEMBER
  • 2000 NISSAN FRONTIER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,210 MILES
Engine hesitates on warm-up (temp gauge moves into normal reading) and runs normal when cools down until it warms up again. Replaced spark plugs, rotor/cap, and fuel filter. Spark plugs were certainly needing replacement. Problem was not fixed so borrowed an Innova 3030 from friend and getting two P0325 readings back which come back after clearing out and starting engine again. See from forums that this indicates knock sensor and see the knock sensor is buried pretty well. Wondering why getting two P0325 readings every time after clearing out and engine is started when it appears there is one sensor.
Saturday, June 5th, 2010 AT 8:02 AM

1 Reply

Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hello,

Ok, you are getting the same code twice. Well in most cases the first code is a Hard code set in the computer the second code usually indicates a Pending code which means that the Knock Sensor is going bad, it has somewhat failed when Cold and works properly when warm.

I recommend replacing it.
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Sunday, June 6th, 2010 AT 8:32 PM

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