yesterday I noticed my started kinda getting stucked when starting my engine, then it came on.

today it did the samething this morning, and whenI was driving and had to stop at the light, It shuted off.

It does run normally the rest of the time.

I have 2 codes
P0871 - Failed Transmission seleni=oid/pressure switch (I added more oil before all this happened)

P0304 - (It might be a spark plug)

but I'm thinking it might be the batery, what you think???

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2002 KJ 4x2 Sport
*245/70/16 Hankook AT
*2" Trailer Hitch (round tube)
*2 Roof Mounted standing up Bike Racks

ignoring the codes for the time being:

a majority of knockoffs at stoplights and irregular idles typically root back to a dying battery

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03 Renegade (Black)
177k miles 3.7L gas - 45RFE
Command Trac / 4.10s
Lift: ft. 790+ rr. JBA4+
The last of the TrailReady Front&Rear Bumpers and TR Rock Rails
Jarhead Offroad light covers
31x10.5R15 RedLetter Grabbers on Blackrock Dunes
L.O.S.T #KD098632

I had a similar issue a few months back. Had the Crank Sensor replaced and it has been great since.

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General Grabber AT2s (245/70r16),2" BDS lift,Front+Rear Tow Hooks, CB radio w/ 4' firestik.