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My check engine light came on

Tiny
PASTORALEMAN
  • MEMBER
  • 2001 MERCEDES BENZ C240
  • 77,000 MILES
I went to my mechanic and he said there are now three codes codes p0172, p0175 and p0335. Can you please help the car runs fine. When I first start the car I do notice it takes it a couple of revs before it starts. The car also give a rotten egg smell. Yesterday the car stalled but it was able to start right back up. Please help.
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Monday, January 9th, 2012 AT 11:22 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Too rich of an A/F mix

Probable causes of an engine running rich are as follows:

1. Excessive fuel pressure can be cause by restricted fuel return line

2. Defective Oxygen Sensors.

3. Leaking injectors and fuel pressure regulator.

4. Coolant temperature sensor out of calibration.

5. Restricted air intake system.
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Monday, January 9th, 2012 AT 11:27 PM

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