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2003 Toyota Echo 1.5L MIL Lamp on, O2 readings abnormal
Posted to Asian Driveability on 3/20/2009 6 Replies

This all started with a p0420. Judging by the mileage on the car, I thought it would be cut-and-dry ... cat replacement. When I hooked up the scan tool to check O2 activity, B1S1 O2 sensor was fixed at 1.27v , rear O2 .1v I back probed the upstream O2 and it w...

6 Replies Received (View Replies)

  Related Documents & Media  2003 Toyota Echo

 
Message Closed w/FIX

car Vehicle Data

2003 Toyota Echo

VIN JTDAT12303
Engine1.5 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp on, O2 Readings Abnormal
OccursAlways

Trouble Codes

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

car Vehicle Data

2003 Toyota Echo

VIN JTDAT12303
Engine1.5 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp on, O2 Readings Abnormal
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)