The Check Engine Light may illuminate due to an evaporative emission (EVAP) system fault. Our technicians tell us these EVAP system faults can be difficult to diagnose but it is not uncommon to find a failed charcoal canister or a loose or worn gas cap.
Problems for specific Toyota Corolla years:
Car problem reports
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Most reported 2000 Toyota Corolla problems
Occasionally, the timing chain and sprockets need replacement due to premature wear and problems with the variable valve timing system (VVTi).