RX330 P430 Error Code

TRACEY DRAPER

MEMBER
2004 LEXUS RX 330
4 CYL
2WD
AUTOMATIC
93,000 MILES

Hi,

I have a 2004 RX330 that received the 90K "tune-up" just 200 miles ago. (Tune-up included Timing belt, all fluids, water pump, transmission flush, spark plugs). I picked up the car and the check engine light came on along with the VSC and TRAC light. Took the car back in and was told the O2 sensor was bad. They replaced the O2 sensor. Now - 200 miles later, the lights are back on. Took the car back into the shop and am told the catalytic converters are starting to go. They say they are slighly out of tolerance, but still drivable.

I'm having issues believing that the "tune-up" didn't cause these issues.

What are your thoughts?

Thanks - Tracey

6 Replies

DOCFIXIT

MECHANIC
18,828 POSTS

Code should be P0420 and there are two CATS which one? Is Dealer doing work?Also more than one O2 sensor which one replaced?

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Monday, January 3rd, 2011 AT 8:21 PM

TRACEY DRAPER

MEMBER
4 POSTS

Hi - No - I am using an independent shop. I just called him and he confirmed the code was P430.

He says the FRONT CAT is the one going and he replaced the Front Lower O2 sensor.

He also said they used a thermal monitor and there is a 50� change from front to back - does this make sense?