Will bad spark plugs cause check engine light?
Will bad spark plugs cause check engine light? Worn spark plugs or spark plug wires can trigger your check engine light to come on. This can cause your engine to misfire and your check engine light to pop on. A flashing engine light could mean that potentially catastrophic misfires are taking place, say our technicians. What to do if your engine management light comes back on? If the light returns, then you probably have an issue that requires the attention of a mechanic. Alternatively, your local garage will be able to reset your engine management light. An even simpler way...