Malfunction Indicator Light
 

I have a 2001 Grand Cherokee Laredo, with 59,900 miles. This morning while
starting the car,
it was a little rough idling and I noticed the malfunction indicator light
stayed on.
I used my other car to get to work today. I checked the gas cap, it seems
tight.
What could this be?

Thanks

Turn the ignition key until the digital odometer displays, repeat
three times in succession and then back to "On" (On/Off, On/Off, On/Off,
On). At the fourth "On" the odometer will be replaced with codes. If no
codes are present then "Done" will appear. Fault codes:
http://www.wjjeeps.com/faultcodes.htm
God Bless America, ßill O|||||||O
http://www.billhughes.com/

Firebird wrote:
>
> I have a 2001 Grand Cherokee Laredo, with 59,900 miles. This morning while
> starting the car,
> it was a little rough idling and I noticed the malfunction indicator light
> stayed on.
> I used my other car to get to work today. I checked the gas cap, it seems
> tight.
> What could this be?
>
> Thanks

I'm getting P0305...I'll look it up. Thanks

"L.W. ("ßill") Hughes III" > wrote in message
...
> Turn the ignition key until the digital odometer displays, repeat
> three times in succession and then back to "On" (On/Off, On/Off, On/Off,
> On). At the fourth "On" the odometer will be replaced with codes. If no
> codes are present then "Done" will appear. Fault codes:
> http://www.wjjeeps.com/faultcodes.htm
> God Bless America, ßill O|||||||O
> http://www.billhughes.com/
>
> Firebird wrote:
>>
>> I have a 2001 Grand Cherokee Laredo, with 59,900 miles. This morning
>> while
>> starting the car,
>> it was a little rough idling and I noticed the malfunction indicator
>> light
>> stayed on.
>> I used my other car to get to work today. I checked the gas cap, it seems
>> tight.
>> What could this be?
>>
>> Thanks

Misfire Detected in Cylinder #5.

"Firebird" > wrote in message
...
> I'm getting P0305...I'll look it up. Thanks
>
> "L.W. ("ßill") Hughes III" > wrote in message
> ...
>> Turn the ignition key until the digital odometer displays, repeat
>> three times in succession and then back to "On" (On/Off, On/Off, On/Off,
>> On). At the fourth "On" the odometer will be replaced with codes. If no
>> codes are present then "Done" will appear. Fault codes:
>> http://www.wjjeeps.com/faultcodes.htm
>> God Bless America, ßill O|||||||O
>> http://www.billhughes.com/
>>
>> Firebird wrote:
>>>
>>> I have a 2001 Grand Cherokee Laredo, with 59,900 miles. This morning
>>> while
>>> starting the car,
>>> it was a little rough idling and I noticed the malfunction indicator
>>> light
>>> stayed on.
>>> I used my other car to get to work today. I checked the gas cap, it
>>> seems
>>> tight.
>>> What could this be?
>>>
>>> Thanks
>
>

Your '01 is OBD II compliant, this means you can get a code reader and find
out for your self what made the MIL light come on.

You can buy OBD II Code Readers for anywhere from about $60 to about $175.
The cheaper units have limited capability, the more expensive units have
more features and abilities. My casual observation is that the units that
cost about $100 are the best value. These units offer the useful features
that the lesser costing units do not have, but they leave out features that
you probably won't use anyway.

Some auto parts stores will let you use a reader for free, the assumption is
that you will learn the Automatic Framis Sensor has failed, and the store
wants you to buy the AFS from them. They want you to buy the special wrench
to put it in, too.




"Firebird" > wrote in message
...
> I have a 2001 Grand Cherokee Laredo, with 59,900 miles. This morning
while
> starting the car,
> it was a little rough idling and I noticed the malfunction indicator light
> stayed on.
> I used my other car to get to work today. I checked the gas cap, it seems
> tight.
> What could this be?
>
> Thanks
>
>

If this engine is one where the cylinders all get their own coil, then I
suspect the coil on the #5 cylinder is going out.





"Matt Macchiarolo" > wrote in message
...
> Misfire Detected in Cylinder #5.
>
> "Firebird" > wrote in message
> ...
> > I'm getting P0305...I'll look it up. Thanks
> >
> > "L.W. ("ßill") Hughes III" > wrote in message
> > ...
> >> Turn the ignition key until the digital odometer displays, repeat
> >> three times in succession and then back to "On" (On/Off, On/Off,
On/Off,
> >> On). At the fourth "On" the odometer will be replaced with codes. If no
> >> codes are present then "Done" will appear. Fault codes:
> >> http://www.wjjeeps.com/faultcodes.htm
> >> God Bless America, ßill O|||||||O
> >> http://www.billhughes.com/
> >>
> >> Firebird wrote:
> >>>
> >>> I have a 2001 Grand Cherokee Laredo, with 59,900 miles. This morning
> >>> while
> >>> starting the car,
> >>> it was a little rough idling and I noticed the malfunction indicator
> >>> light
> >>> stayed on.
> >>> I used my other car to get to work today. I checked the gas cap, it
> >>> seems
> >>> tight.
> >>> What could this be?
> >>>
> >>> Thanks
> >
> >
>
>

The OBD is an Acronym for: "On Board Diagnostics" meaning it can be
read without using a tool like: http://billhughes.com/faultCode.mpg
God Bless America, ßill O|||||||O
http://www.billhughes.com/

Jeff Strickland wrote:
>
> Your '01 is OBD II compliant, this means you can get a code reader and find
> out for your self what made the MIL light come on.
>
> You can buy OBD II Code Readers for anywhere from about $60 to about $175.
> The cheaper units have limited capability, the more expensive units have
> more features and abilities. My casual observation is that the units that
> cost about $100 are the best value. These units offer the useful features
> that the lesser costing units do not have, but they leave out features that
> you probably won't use anyway.
>
> Some auto parts stores will let you use a reader for free, the assumption is
> that you will learn the Automatic Framis Sensor has failed, and the store
> wants you to buy the AFS from them. They want you to buy the special wrench
> to put it in, too.
>
> "Firebird" > wrote in message
> ...
> > I have a 2001 Grand Cherokee Laredo, with 59,900 miles. This morning
> while
> > starting the car,
> > it was a little rough idling and I noticed the malfunction indicator light
> > stayed on.
> > I used my other car to get to work today. I checked the gas cap, it seems
> > tight.
> > What could this be?
> >
> > Thanks
> >
> >

While that is true, the code reader translates the codes and is easier to
use. There is no requirement to hold your tongue just right to get something
to blink, and annotate the sequence of blinks correctly. And, the reader is
free to use in lots of places.




"L.W. ("ßill") Hughes III" > wrote in message
...
> The OBD is an Acronym for: "On Board Diagnostics" meaning it can be
> read without using a tool like: http://billhughes.com/faultCode.mpg
> God Bless America, ßill O|||||||O
> http://www.billhughes.com/
>
> Jeff Strickland wrote:
>>
>> Your '01 is OBD II compliant, this means you can get a code reader and
>> find
>> out for your self what made the MIL light come on.
>>
>> You can buy OBD II Code Readers for anywhere from about $60 to about
>> $175.
>> The cheaper units have limited capability, the more expensive units have
>> more features and abilities. My casual observation is that the units that
>> cost about $100 are the best value. These units offer the useful features
>> that the lesser costing units do not have, but they leave out features
>> that
>> you probably won't use anyway.
>>
>> Some auto parts stores will let you use a reader for free, the assumption
>> is
>> that you will learn the Automatic Framis Sensor has failed, and the store
>> wants you to buy the AFS from them. They want you to buy the special
>> wrench
>> to put it in, too.
>>
>> "Firebird" > wrote in message
>> ...
>> > I have a 2001 Grand Cherokee Laredo, with 59,900 miles. This morning
>> while
>> > starting the car,
>> > it was a little rough idling and I noticed the malfunction indicator
>> > light
>> > stayed on.
>> > I used my other car to get to work today. I checked the gas cap, it
>> > seems
>> > tight.
>> > What could this be?
>> >
>> > Thanks
>> >
>> >