Quote:
Originally Posted by jgue467
is what you'll get and no power boost to show for it. The front sensor is called the air/fuel sensor (it has a much wider range than a standard o2) while the rear is the 02 sensor you mentioned. The ECM depends on the 2 to compare and run its code that optimizes power and fuel usuage. Without the rear there can be no comparison so ECM goes into limp home mode, you'll waste fuel for no good reason but hey its your gas and who knows what your rig will run like after time. besides why does ur flwmster need to be so forward?
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NO. The 4Runner only uses the rear sensor to set the CAT efficiency code (P0420) and the codes related to the sensor itself. Power and MPG depend only on the front sensor, A/F in his case. There is ZERO chance a rear sensor issue puts him in open loop (not really a limp-home mode, but what I assume you meant.)
That said, I'd prefer to keep the sensor and run a simulator to keep my MIL operational. I'd hate to get a code I really needed to know about and not see the light.
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'99 4Runner SR5 5spd 3.4L V6 4WD(U.S), original '99 Talls in front, OME 906s in back, Hella fogs, Trekmaster shocks in front, Billy in back, no running boards, FIAMM horns, Alpine sound, Michelin LTX M/S2's, owned since new.
'97 HiLux SW4 5spd 4WD(Japan model bought in Brazil assembled in Argentina, very close to a 3.0 4Runner/Surf)
'71 FordWillys Jeep CJ5 (with straight six Ford Maverick 3.0 liter engine--lives in the mountains north of Sao Paulo Brazil)
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