I CHANGED MY BENZ C240 2003 MAKE ENGINE ITS GIVING A ERROR CODE PO175

  • Tiny
  • amarsandhu
  • 2003 Mercedes Benz C240
  • 80,000 miles

Idle speed cannot control rpm is 10000 when I start

Wednesday, February 8th, 2012 AT 4:57 AM

5 Answers

  • Tiny
  • rasmataz
  • Member

Running rich and also look for vacuum leak

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Wednesday, February 8th, 2012 AT 5:06 AM
  • Tiny
  • rasmataz
  • Member

Its running to rich check oxygen and coolant temperature sensor and also look vacuum leak

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Wednesday, February 8th, 2012 AT 5:11 AM
  • Tiny
  • rivermikerat
  • Expert
  • 6,118 posts

10,000RPM? Hard to believe.
Our reference doesn't show a P0175. I have found a number of mentions of this code in conjunction with a P0172. This means the air/fuel ratio is too rich. Check the fuel pressure. Check for a clogged air filter. Check the gap on the spark plugs(.039) and the plug wire impedance. MBZ doesn't supply shops with a specification for this, but expect in the range of 14Kohms to 20Kohms.

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Wednesday, February 8th, 2012 AT 5:13 AM
  • Tiny
  • rivermikerat
  • Expert
  • 6,118 posts

Yargh. You beat me again. Walk the plank!

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Wednesday, February 8th, 2012 AT 5:23 AM
  • Tiny
  • rasmataz
  • Member

Got ya

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Wednesday, February 8th, 2012 AT 5:31 AM

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