READING CODES PO340 AND PO300

  • Tiny
  • zuky
  • Member

Thanks, Think maybe the plug that connects to sensor? It was kinda oiled from pan, or just untape the sheild around it and start looking for bad spot?

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Wednesday, September 12th, 2012 AT 7:17 PM
  • Tiny
  • saturntech9
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  • 28,246 posts

The wires end to end from the sensor to the pcm and see which wire it is. Use low scale resistance setting on your meter.

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Wednesday, September 12th, 2012 AT 10:48 PM
  • Tiny
  • zuky
  • Member

Okay I found both wires at sensor plug were bare in same spot next to each other, I made new plug retested and everything is normal for ckp, the code lite went out for ckp and I took it for ride and reset cmp waited to see if ceck eng. Lite to come on and it did, its now reading the po505 code, idle is surging from 1200rpm to 2oo2 after warm up.

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Friday, September 14th, 2012 AT 12:59 AM
  • Tiny
  • saturntech9
  • Expert
  • 28,246 posts

I posted the trouble tree for code P0505 let me know what you find.

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Friday, September 14th, 2012 AT 5:09 AM
  • Tiny
  • zuky
  • Member

I do not know where the IAC is. Got any pics? And where the ajusting screw is or FIA fast idle air valve.

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Friday, September 14th, 2012 AT 7:17 AM
  • Tiny
  • saturntech9
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Iam sure you dont have a scan tool to see iac duty so I would leave that sure around.I posted a pic of the idle air control valve so I would start by removing it and cleaning it. Also clean the ports etc.

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Friday, September 14th, 2012 AT 9:31 PM
  • Tiny
  • zuky
  • Member

Thank you, Now I need to know where the idle air ajusting screw is because the trouble tree is wanting me to remove that screw and clean the port it screws into.

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Saturday, September 15th, 2012 AT 3:47 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,246 posts

So far I haven't found a diagram showing where that screw it is.

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Saturday, September 15th, 2012 AT 5:49 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

For this model there are no idle adjust screw as the idle speed is PCM controlled.

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Saturday, September 15th, 2012 AT 6:04 PM
  • Tiny
  • zuky
  • Member

Okay I just did a resistance on valve and it is 11 being in spec, I read voltage with key on, on the plug and it is only getting 10- 11 volts. I cleaned the valve and run a fused wire from battery to test valve and it opened and I could blow freely through it, does this mean Im not getting proper volts from pcm?

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Saturday, September 15th, 2012 AT 6:11 PM

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