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P0173 Diagnostic Trouble Code Discussion for August 2009

Fuel Trim Lean Or Rich (Bank 2)

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Trouble Ticket Help Requests for DTC P0173
Help Request Posted
1997 Mitsubishi Montero SR 3.5L Excessive Emissions, MIL Lamp on VIN: JA4MR51R2V
P0173: Fuel Trim Lean Or Rich (Bank 2). 97 montero 3.5 L repeatedly sets codes for fuel trim out of range on both banks but bank 2 seems to be more prominate. Plugs and wires are new, fuel filter was replaced and injectors have been cleaned. It takes a couple of drive cycles to set code and turn MIL...
August 11, 2009
1994 Ford Explorer Sport 4.0L Excessive Emissions, RICH (BANKS 1&2) VIN: 1FMCU24X2R
P0173: rich exhaust bank 1 koer. i`ve run numerous tests as per flowcharts, no luck. prior to that, i found and replaced the fuel pressure regulator. i believe the vehicle is really running rich, as the o2 sensors voltages hang at 700 mv at idle, but if i create a vacuum leak, the dvom show...
August 14, 2009