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1995 Ford Taurus Bank 2 runs rich

Tiny
PETERCHAN_CAL
  • MEMBER
  • 1995 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
Take the car, 95 Taurus SHO to Dealer to check problem with Check Engine light on. Car hesistate and can feel misses when coasting. Mechanic said Bank 2 O2 sensor sends intermediate signal ON and OFF to PCM. He needs more time to trace where the signal comes from even with engine OFF, ignition ON. The final verdict is Bank 2 is running rich.

Spend money on an hour of diagnostic without getting anywhere!
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Monday, February 2nd, 2009 AT 9:56 PM

2 Replies

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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Monday, February 2nd, 2009 AT 10:00 PM
Tiny
PETERCHAN_CAL
  • MEMBER
  • 2 POSTS
These are the exact words by the mechanic

177018 6033---EEC Test for Code found Bank 2 O2 sensor rich code, and bank 2 sensor lean codes. Jacked up vehicle and unplugged O2 sensor monitored pids, found O2 sensor getting intermittant voltage and intermittent open, bank 2 circuit has a wiring problem somewhere and will take a bit to trace down problem.
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Monday, February 2nd, 2009 AT 10:20 PM

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