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2002 Toyota Sienna LE 3.0L MIL Lamp on
Posted to Asian Driveability on 10/31/2012 13 Replies

Evening All,

Thank you for taking the time to read this!

This Sienna Intermittently throws an P0420b code.

When this started we first put in the three sensors, based on the mileage. Code came back in one month. Next after watching the rear O2 sensor on nume...

Summary posted 11/5/2012

13 Replies Received (View Replies)

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car Vehicle Data

2002 Toyota Sienna LE

VIN 4T3ZF13C42
Engine3.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)