1999 Chrysler Cirrus Engine Code P0172

1999 CHRYSLER CIRRUS
120,000 MILES • 4 CYL • FWD • AUTOMATIC
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WHIP-A-PEEL
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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???
Jan 21, 2009 at 10:56 AM
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RASMATAZ
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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.
Jan 21, 2009 at 11:03 AM