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1999 Toyota 4Runner SR5 3.4L MIL Lamp on
Posted to Asian Driveability on 10/26/2007 15 Replies

Keeps setting P0420, replaced air/fuel ratio sensor and it outputs a voltage of 3.2 volts @ idle all the way to the computer. The scanners (Modus) and (Mastertech) show 660mv for bank 1 sensor 1 (the air/fuel ratio sensor) and a varying 100mv to 900mv for the ...

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  Related Documents & Media  1999 Toyota 4Runner SR5

 
Message Closed w/Summary

car Vehicle Data

1999 Toyota 4Runner SR5

VIN JT3HN86R5X
Engine3.4 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways
Misc.California Emissions

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
Message Closed w/Summary

car Vehicle Data

1999 Toyota 4Runner SR5

VIN JT3HN86R5X
Engine3.4 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways
Misc.California Emissions

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)