My 2006 Cadillac CTS has HID headlights,I let a so called mechanic install replacement headlights and he installed non HID headlights and now my check engine light is on.did he cause the engine light to come on by doing this? He didn't change any wiring harnesses or anything,he just took blown HID lights out and put non HID lights in.thanks
My car has 129000 miles.
My car has an automatic transmission.
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