ENTER A QUESTION OR SUBJECT AND CLICK SEARCH -WHAT IS CODE PO170-PO173 ON A MERCEDES BENZ 1998 CLK320

  • Tiny
  • BTOURES
  • 1998 Mercedes Benz CLK320
  • 26,000 miles

I got an check engine code of: PO170 (BANK 1) AND PO173 (BANK2) I REPLACED THE maf BUT NO LUCK

Thursday, November 24th, 2011 AT 8:24 PM

1 Answer

  • Tiny
  • rasmataz
  • Member

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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Thursday, November 24th, 2011 AT 10:50 PM

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