What is what does it mean when your check engine light is flashing?

A flashing Check Engine Light is a serious warning sign that requires immediate attention. It indicates a severe problem that could cause significant damage to your engine and/or compromise your vehicle's safety.

Here's what it usually means:

• Severe Misfire: This is the most common reason. A misfire occurs when one or more of your engine's cylinders aren't firing properly. Unburnt fuel can then enter the Exhaust System, potentially damaging the Catalytic Converter. This is why a flashing light is so urgent; catalytic converter damage can be expensive to repair.

• Potential Consequences: Continuing to drive with a flashing check engine light can lead to:

  • Catalytic Converter Damage: This is a very expensive repair.
  • Engine Damage: Unburnt fuel and improper combustion can damage engine components.
  • Reduced Fuel Efficiency: A misfiring engine will waste fuel.
  • Poor Performance: The vehicle may run rough, hesitate, or lack power.

• What to Do:

  1. Reduce Speed and Pull Over: If safe, pull over to the side of the road as soon as possible.
  2. Turn Off the Engine: Let the engine cool down.
  3. Do Not Drive Far: Avoid driving any further than necessary. Have the vehicle towed to a qualified mechanic.
  4. Get a Diagnosis: A mechanic will use an OBD-II Scanner to read the trouble codes stored in the car's computer and pinpoint the problem.

Ignoring a flashing check engine light can lead to costly repairs and potentially dangerous situations. Prompt attention is crucial.