× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
2003 Toyota Highlander 3.0L MIL Lamp on
Posted to Asian Driveability on 1/27/2012 11 Replies

This vehicle has 2 catalytic converters at the manifolds and 1 before the front muffler. 1 air fuel sensor before each front converter and only 1 downstream oxygen sensor after the rear converter. So how are we monitoring cat 1&2? Or is the downstream consider...

11 Replies Received (View Replies)

  Related Documents & Media  2003 Toyota Highlander

 
Message Closed w/Summary

car Vehicle Data

2003 Toyota Highlander

VIN JTEHF21A33
Engine3.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways
Misc.California Lev

Trouble Codes

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

car Vehicle Data

2003 Toyota Highlander

VIN JTEHF21A33
Engine3.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways
Misc.California Lev

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)