if ur car runs fine b4 and now it has a problem after the timing belt r&r ..most likely u missed something..did u use the toyota service manual or just some el cheapo book from a parts store...sounds like u had the timing belt installed incorretly....lets do this...do a static compression and email me the reading..and I'll followup ..if u have ur cam line up with wrong cam timing ...too much fuel b4 or after valves close...of course ur O2 sensor seeing too much hydrocarbon or not approriate O2 content --> turn on the chk engine lite ...its doing its job ...what & where on god green earth that a component code came on that make u think a component indicate it is defective?...hey man ...stop throwing parts at a problem..understand the sys 1st and verify it is a bad component

Answered by kin chan
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