The rule of thumb is that if the check engine light is flashing, you can’t keep driving the car. It’s an emergency. Often it indicates an engine misfire. If you keep driving, you will likely cause irreversible damage, mostly to the (expensive) catalytic converter.
What causes a check engine light to flash?
A flashing check engine light indicates a much more serious issue. Most often it means that the engine is misfiring and unburned fuel is getting into the exhaust system. This raises the temperature of the catalytic converter and can cause critical damage.
What does it mean when your check engine light flashes then stops?
A flashing check engine light usually refers to cylinder misfiring. Misfiring should be investigated and resolved promptly – that’s why the light flashes versus simply staying steady – because misfiring can damage the catalytic converter which can result in additional costly repairs.
Why is my check engine light flashing and car shaking?
The primary culprit that makes your check engine light blinking and car shaking is a malfunctioning cylinder. … When the cylinder does not work as expected or it does not pass the fuel and air every time the crankshaft turns, it misfires. As a result, the engine runs rough and it makes the overall car shaking.
How much does it cost to fix an engine misfire?
Misfiring of a cylinder can happen for numerous reasons. Here are the most common causes and related costs of the misfire condition: Carbon or oil-fouled sparkplugs: $100 to $300 depending on cost of plugs and labor to replace.
What does an engine misfire feel like?
When a misfire occurs, you may feel like light or strong jerk coming from the engine. These misfires do often come under load from the engine, like when you are accelerating hard. The most common situation to notice misfires is on high gears, low RPM, and the accelerator to the floor.
Can low oil cause misfire?
There is a relation between engine misfire and low oil pressure because the sudden drop of oil pressure can cause the engine not running right and the RPMs to drop low in gear causing an engine misfire.
How do you fix an engine misfire?
Inspect the spark plugs for signs of damage.
Use a spark plug socket to remove the plug so you can get a good look at it. The damage you see will help you determine the cause of the misfire. If the spark plug is just old, replacing it may solve the problem. Make sure to replace and properly gap new spark plugs.
Can you drive with a misfire?
An engine misfire can be caused by bad spark plugs or imbalanced air/fuel mixture. Driving with a misfire isn’t safe and can damage your engine.
Can bad spark plugs cause flashing engine light?
Worn/failed spark plugs, coil packs, or spark plug wires can trigger your check engine light to come on. In today’s cars, say Firestone Complete Auto Care technicians, if a plug starts to fail then the most obvious event should be the check engine light coming on or even flashing.