Skip the auto shop - Our mechanics make house calls

Q: Check engine light

asked by on

Random misfire in codes, replaced plugs, can't get check engine light to go off any suggestions?

My car has 80000 miles.
My car has an automatic transmission.

A: Hi there, thanks for your question. I’d be ...

Hi there, thanks for your question. I’d be happy to help. A [misfire can be caused by a variety of things other than bad spark plugs such as bad plug wires, vacuum leak, dirty fuel injectors, a weak fuel pump (low fuel pressure) or a faulty fuel pressure regulator or weak ignition coil to name a few others. I would recommend having an expert from YourMechanic come to your home to diagnose using a scan tool to be sure there are not more codes indicating other components that need to be repaired.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: The car is misfiring and not picking speed

Engine misfires can be caused by many different problems and are generally caused by either a spark or fuel issue or in some cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft...

Q: Air conditioner not working after a battery change

Hello. Thank you for writing in. At first, disconnect the battery and verify that all of the wires in the starting system and charging system are clean, dry, and tight. Make sure the battery cables are corrosion free, and have...

Q: My heat stop blowing all together.

It sounds like you may have a faulty blower motor relay. Occasionally, the blower motor itself will wear out or become faulty working intermittently as the brush contacts inside the motor wear out. The blower motor relay supplies power to...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...