An illuminated Check Engine Light could be caused by a defective VVT-i controller, which changes cam timing for optimal power. Updated parts are available and the repair may be covered under the powertrain warranty.
Car problem reports
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Most reported 2008 Scion xB problems
Vehicles fitted with remote start may encounter a dead battery after sitting for a few days. This can be due to a parasitic draw caused by the remote start computer. Our technicians remind us proper diagnostic procedures should be followed before replacing the remote start module with an updated part.