Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-85577-jlumvmjs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-85577-jlumvmjs:47:15602)
    at /tmp/execjs20161208-85577-jlumvmjs:49:31860
    at a.r.perform (/tmp/execjs20161208-85577-jlumvmjs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-85577-jlumvmjs:49:31821)
    at r (/tmp/execjs20161208-85577-jlumvmjs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-85577-jlumvmjs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-85577-jlumvmjs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-85577-jlumvmjs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-85577-jlumvmjs:173:8

Q: The Check Engine Light came on, I hooked it up to my scanner and got the code P0308 (cylinder #8 misfire).

asked by on

Engine seems to run fine and I don't notice anything wrong with it when Im driving... do I need to replace my ignition coil or not? What else could be the issue? I don't want to waste money having someone replace my ignition coil if that won't fix my issue. I know my CV boot is cracked so could that be causing the problem?

My car has 121000 miles.
My car has an automatic transmission.

A: An easy way to isolate if the ignition coil...

An easy way to isolate if the ignition coil is the problem is to swap the #8 coil with another cylinder. Swap the #8 coil with the coil from the adjacent cylinder, then clear the codes. If the code remains for cylinder #8, then there are other issues such as the spark plug, wiring, or a signal issue from the PCM. Also, an injector with a poor spray pattern can cause the misfire as well as a mechanical issue with cylinder #8 such as a valve or compression issue.

If the fault code moves with the ignition coil, then odds are you do have a bad ignition coil. If the coil is at fault, you may want to consider replacing them all at the same time. More commonly than not, when one coil fails, one or more will soon fail as well. Changing them all at the same time alleviates having to go through this 7 more times over the next several months. Otherwise replacing them as they fail is not a problem.

To avoid any unnecessary repairs, have a certified technician, such as one from YourMechanic, diagnose the Check Engine Light firsthand and help you resolve the issue.

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: How do I fix the timing when it has jumped timing

There is no easy way to correct a jumped timing belt. You will need to disassemble a portion of the engine to gain access to the belt tensioner, so you can move the belt back into position. I suggest replacing...

Q: Car overheats and smokes

The overheating could be from one or more problems on this particular engine and vehicle: the water pump, radiator, or thermostat may be bad or leaking. If the smoke is coming from the tailpipe, you likely have blown a head...

Q: rough idle

Hello. I would need to know which misfire codes you are getting to know for sure what is going on. Most of the time on this vehicle if it is a single cylinder misfire then it may be as simple...

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...