Check engine light

Tiny
JOHNCE
  • MEMBER
  • 2002 MERCEDES BENZ ML320
  • 6 CYL
  • AWD
  • AUTOMATIC
2002 mercedes 320 ml check engine light?O2 sensor code po141 and po140 how many sensor are there before cat converter? Should both be changed?Thank you
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Thursday, March 10th, 2011 AT 5:45 PM

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Tiny
RASMATAZ
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Thursday, March 10th, 2011 AT 7:48 PM

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