Radiator repair, an in-depth look, an in-depth exploration
Auto parts shop employees are not qualified to do anything beyond interpreting the trouble codes. For service done right, see your certified technician. Minor issues like a loose gas cap, bad spark plug wires or moisture in the engine can trigger a check engine light. If your light signals a non emergency issue, check your gas cap and check your engine for wetness before going to the shop. Engines will misfire if spark plug wires wear down; give them a look as well.