Skip the auto shop - Our mechanics make house calls

Q: Multiple cylinder misfires

asked by on

check engine code is multiple cylinder misfires

My car has 166145 miles.
My car has an automatic transmission.

A: Generally, misfires are caused by either a ...

Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules not working properly. Fuel related misfires can be caused by many different things such as low fuel pressure, faulty or dirty fuel injectors, a faulty O2 sensor, a dirty or failing mass air flow sensor, a faulty or dirty idle air control valve or a vacuum or intake leak. This results in a misfire or an explosion in the cylinder that is much less powerful than the other cylinders. Due to the number of different things that may cause an engine misfire, the quickest and easiest way to diagnose this type of problem is to hook the vehicle up to a scanning tool which will download any potential fault codes that may have registered in the vehicle’s computer as a result of the poor running condition. I would recommend having an expert from YourMechanic come to your location to diagnose your misfiring problem.

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: Loud humming noise

The bearing or brushes in your alternator are likely going out. You could also have another issue in your belt drive system causing the noise and lack of charging. A visual inspection of the drive system, a stethoscope to listen...

Q: Do all xtronic transmissions have a shudder when accelerating

The transmission shudder is very common of a problem but is not normal and the transmission control module may be in need of reprogramming as per a technical bulletin NTB15-014B dated 4/5/2016. This is a recent TSB and may not...

Q: 2009 Nissan Murano won't pass smog check

The camshaft position error is a likely cause for the vehicle no-start situation. The engine computer reads and relies on camshaft and crankshaft angle readings for ignition timing. No angle reading, no spark and a fail-safe to prevent engine damage....

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.