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- Jeep Mailing List (https://www.jeepscanada.com/jeep-mailing-list-32/)

- - Code P0301 (https://www.jeepscanada.com/jeep-mailing-list-32/code-p0301-35786/)

You can reset the computer by simply disconnecting the battery for a few
seconds or my use of a reader. The readers are available for use at many
auto-parts stores... some free of charge or with a small deposit.
http://www.obd-codes.com/trouble_cod...e-detected.php
P0301 Code - Cylinder #1 Misfire
Technical Description
Cylinder #1 Misfire Detected

What does that mean?
A P0301 code means that the the car's computer has detected that one of the
engine's cylinders is not firing properly. In this case it's cylinder #1.

Symptoms
Symptoms may include:
a.. the engine may be harder to start
b.. the engine may stumble / stumble, and/or hesitate
c.. other symptoms may also be present
Causes
A code P0301 may mean that one or more of the following has happened:

a.. Faulty spark plug or wire
b.. Faulty coil (pack)
c.. Faulty oxygen sensor(s)
d.. Faulty fuel injector
e.. Burned exhaust valve
f.. Faulty catalytic converter(s)
g.. Running out of fuel
h.. Poor compression
i.. Defective computer
Possible Solutions
If there are no symptoms, the simplest thing to do is to reset the code and
see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check
all wiring and connectors that lead to the cylinders (i.e. spark plugs).
Depending on how long the ignition components have been in the car, it may
be a good idea to replace them as part of your regular maintenance schedule.
I would suggest spark plugs, spark plug wires, distributor cap, and rotor
(if applicable). Otherwise, check the coils (a.k.a. coil packs). In some
cases, the catalytic converter has gone bad. If you smell rotten eggs in the
exhaust, your cat converter needs to be replaced. I've also heard in other
cases the problems were faulty fuel injectors.

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:440EF747.AF66622@sympatico.ca...
> It isn't going to reset as long as something is wrong.
>
> I would be checking out cylinder 1 myself.....
>
> You don't say what you are driving, but you likely have a spark plug at
> least in there and maybe a plug wire with a distributor cap and
> rotor....
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> Firebird wrote:
>>
>> I got the light on the dashboard while waiting in line to exit a large
>> parking lot. THe engine had been idling for about 5-7 minutes. Code
>> P0301
>> is a miss in cylinder 1, however I never felt anything and the engine
>> runs
>> ok to me.
>> The light has been on the dashboard for about 3 weeks now.
>> How should I proceed. I thought it resets itself after 40 starts.

Got over thirty thousand miles on your plugs?
http://www.----------.com/lubeSchedule.pdf
God Bless America, Bill O|||||||O
mailto:--------------------
Firebird wrote:
>
> I got the light on the dashboard while waiting in line to exit a large
> parking lot. THe engine had been idling for about 5-7 minutes. Code P0301
> is a miss in cylinder 1, however I never felt anything and the engine runs
> ok to me.
> The light has been on the dashboard for about 3 weeks now.
> How should I proceed. I thought it resets itself after 40 starts.

Reset the light and wait to see if it returns. Odds are good that it will,
and you need new plug wires or a coil if your motor is the type that has a
coil for each plug.

AutoZone Parts Stores have the OBD II Code Reader (scan tool) that they will
let you use, or they will use it for you, for free.

"Firebird" <erodman@nyc.rr.com> wrote in message
news:kxyPf.9577$4%1.6856@news-wrt-01.rdc-nyc.rr.com...
>I got the light on the dashboard while waiting in line to exit a large
>parking lot. THe engine had been idling for about 5-7 minutes. Code P0301
>is a miss in cylinder 1, however I never felt anything and the engine runs
>ok to me.
> The light has been on the dashboard for about 3 weeks now.
> How should I proceed. I thought it resets itself after 40 starts.
>
>

I have the 6 cylinder. I think its a 4.0 ...it runs fine. It does not feel
like its missing.

"Herb Leong" <herb@urusei.net> wrote in message
news:3qGdnfPjKL8uIJPZnZ2dnUVZ_vmdnZ2d@speakeasy.ne t...
> In article <kxyPf.9577$4%1.6856@news-wrt-01.rdc-nyc.rr.com>,
> Firebird <erodman@nyc.rr.com> wrote:
> #I got the light on the dashboard while waiting in line to exit a large
> #parking lot. THe engine had been idling for about 5-7 minutes. Code
> P0301
> #is a miss in cylinder 1, however I never felt anything and the engine
> runs
> #ok to me.
> #The light has been on the dashboard for about 3 weeks now.
> #How should I proceed. I thought it resets itself after 40 starts.
>
> The code will reset after 40 starts with no problems. The light
> resets sooner than that. If you light is still on, it's time to
> check your plug and anything attached to it...
>
> What engine do you have?
>
> /herb