CHECK ENGINE LIGHT

2000 Toyota Avalon

Tiny

dovy289

January, 3, 2010 AT 7:37 PM

Engine Performance problem
2000 Toyota Avalon 6 cyl Front Wheel Drive Automatic 135900 miles

Last week the Check Engine light came on. The code was P0420: Catalyst system efficiency below threshold-bank1/ probable cause 1) Air leak in exhaust before rear HO2S(Heated oxygen sensor)Bank 1; 2) AF sensor error; 3)Fuel system fault; 4) Faulty catalytic converter.

The car is not running rough or idling rough indicating a stopped up catalytic converter, but this week especially has started really sucking gas. Where would I have my mechanic start? I cannot afford a " process of elimination" at his time being a disabled widow.

ALSO: Just before I took possession of this car about 2 months ago the rear struts and mounts were replaced. I am still hearing a " clunking" noise like something is loose when going over a rough spot in the road. I've been told everything under there is tight and not a tire iron loose with the spare. What else can I have them check for?

FOUND 17084 RELATED QUESTIONS

0 Answers

Please login or register to post a reply.

Code Read Retrieval/Clear - Dodge Stratus
Code Read Retrieval/Clear Scion XD
Read Codes Like a Pro
Code Read Retrieval/Clear
 Step by Step video GMC Yukon XL 2000-2006
How to gather codes Ford Explorer