Skip the auto shop - Our mechanics make house calls

Q: Computer shows misfire cylinders and timing advanced banks codes

asked by on

My car started to run rough and the computer was showing four codes: misfire cylinders 3 and 4, timing advanced banks 1 and 2. I thought the problem was the timing belt, so I took off the covers. The cam marks were lined up on both sides. I am not sure where it is supposed to be, but the crank mark was at the 12:00 position. Also I am not sure how the timing mark is to appear, but there is a white paint mark around the 1:00 position. Is the problem a timing problem or what else is the cause?

A: You didn't say which exact timing codes...

You didn't say which exact timing codes were set, but these codes can also be set by a faulty camshaft or crankshaft sensor. However, more often than not, the problem is with the timing components. The timing belt only has to be off a tooth or so for these codes to set. There's should be three alignment marks on your vehicle - one near the camshaft at the belt cover, one near the camshaft at the cam cap and one on the block near the crankshaft. The corresponding marks on the sprockets must match up exactly. To have this properly addressed, a qualified technician, like one from YourMechanic can visit your car's location to diagnose the misfire and aid with repair.

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・Save up to 30%

Get a quote

What others are asking

Q: Misfire still after tuneup

Hi there. If the spark plug, plug wire and ignition coil are good, then the issue may be inside of the engine. I would do a compression test first to see if there is any internal failure. If the compression...

Q: P0300 code, misfiring on a '06 Hmamer H3

Those things are notorious for having fuel injection problems. GM made them with cheap plastic and the fuel injection parts, so when they get to be older, after 10 years old, the plastic cracks, leaks, and gets multiple misfires. That's...

Q: Car misfires

One thing comes to mind with your car. There is a bulletin to solve a problem with fuel injector primary circuit codes. P0351-P0356. This may or may not repair the misfire, but it will prevent the false codes. If this...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...