2002 NISSAN ALTIMA P0507. IDLE CONTROL SYSTEM RPM HIGHER TH

  • Tiny
  • dp2680
  • 2002 Nissan Altima

2002 Nissan Altima 4 cyl Wheel Drive Type unknown Automatic 102500 miles

P0507. Idle control system RPM higher than expected what causes this to happen and what does it mean?

Friday, December 28th, 2007 AT 3:15 PM

4 Answers

  • Tiny
  • blackop555
  • Expert
  • 10,563 posts

First you should clean out your throttle body.

Next is your vehicle surging or just plain idling high? If its idling high turn down the idle adjust screw a tad.

If its surging you should check the IAC and EGR valves.

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Friday, December 28th, 2007 AT 7:49 PM
  • Tiny
  • dp2680
  • Member

I do feel like mine is surging. What is the IAC and EGR valves? What do they do and where are they located. Thank you

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Saturday, December 29th, 2007 AT 7:23 AM
  • Tiny
  • blackop555
  • Expert
  • 10,563 posts

IAC is idle air control it sets the idle for the engine, it is located on the side of the throttle body.

The EGR is exhaust gas recirucaltion, it takes the unburned exhaust gases and reburns them just like the PCV valve, it is located next to the throttle body also.

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Saturday, December 29th, 2007 AT 8:45 AM
  • Tiny
  • lostinmars
  • Member

Cleaning the throttle is the last thing you should do on this car. This is what typically leads to this code.

The idle parameters need to be reset or the throttle body needs replaced. Can only be done by someone with proper software/scan equipment to program it.

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Wednesday, January 23rd, 2008 AT 11:31 PM

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