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1999 Chrysler Cirrus Engine Code P0172

Tiny
WHIP-A-PEEL
  • MEMBER
  • 1999 CHRYSLER CIRRUS
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 120,000 MILES
System Runs Too Rich (P0172) Have changed IAC, Wires, Plugs, Front O2, Fuel Pump (used), Map Sensor(used), cleaned the throttle body, and still it iddles ruff and pulls that code. Rear O2 sensor not working but it had problem when O2 was intact. Any ideas?
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Wednesday, January 21st, 2009 AT 10:56 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode.
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Wednesday, January 21st, 2009 AT 11:03 AM

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