2002 ram 1500=code po455???

thanks for reply,and i tought i had this code pop up before but could not remember.now hereing your answer i have ,and when i checked my gas cap last time it was off.it has been very cold here lately might have some expand- contract issues due to weather or old hose..it seemed like last time it took about 10 to 20 starts for emmision light to go away.

thanks again

#5 of 7 CODE PO455 by moparblue2

Jan 10, 2010 (9:34 am)

i had same code on my 2002 1500 4x4. it was not gas cap. there is a hose under bed drivers side that was cracked. you can only get it at dealer around 9.00 bucks a couple years ago. all your EVAP. canastir & stuff is under bed.

#6 of 7 Cylinder 5 misfire on 2002 ram, 4.7 liter engine by jgreen76301

May 25, 2010 (10:37 pm)

I have a code reader. I don't have the specific code number in front of me at this time. I have changed the spark plugs, all eight. The truck has 130k miles. This code prompted me to change spark plugs. Code reappeared. I bought a new spark plug coil for this cylinder. Code reappeared. I switched coil and plug with cylinder three. Code still reappeared and the number five cylinder misfire. I have cleared the code, prior to any of these adjustments. I have noticed, that after a cold start (not cold outside, just engine), and I press on the accelerator pedal to move, the engine service light comes on. I checked the code and it is the same. I have had the code checked at two other different locations ( AutoZone and Walmart). The same code appears on those code readers. What could be the problem, other than what I have tried?

Replies to this message:

corkscrew (May 26, 2010 6:13 am)

#7 of 7 Re: Cylinder 5 misfire on 2002 ram, 4.7 liter engine [jgreen76301] by corkscrew

May 26, 2010 (6:13 am)

Replying to: jgreen76301 (May 25, 2010 10:37 pm)

It would be very helpful to have the specific code. To get it, cycle the ignition "on- off- on -off -on" under 5 seconds, without starting the truck. The code will appear where the odometer displays.
Corkscrew

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