04 Jeep Liberty renegade 3.7 missfire

[416kJ]

Hello I recently bought my first Jeep ever an 04jeep Liberty renegade edition 3.7
However I’m having a miss-fire issue
Hopefully someone can help me out
Here is the code ,
(P2302) iginition coil A (secondary circuit)
Can someone please chime in and help me pinpoint which coil I should be looking at
Either in the driver side or pass side
(Link to picture of actual scanner code photo)
https://ibb.co/C02tf8Q


my other code is :
(p0157)
o2 sensor circuit low (bank2 sensor2)
I know my exhaust need to be redone just wasn’t sure which 02 I need to replace if anyone can chime in on that as well I’d be very appreciative of that , tryed to search but I’m not to familiar with this site yet
(Link to picture of actual scanner code photo)
https://ibb.co/FW1b8vs

 

[416kJ]

All help appreciated thanks Jeep community
https://ibb.co/j837mb5

 

[LibertyTC]

Welcome to the forum !
Your photo shows 1 of 3 codes what's the other code?
P2302: https://www.obd-codes.com/p2302
Marlon from assembly plant also recommended Checking the wires going to ignition coil #1. See if they're nice and tight and not frayed or rubbing against something.
See post 2: https://www.jeepkj.com/threads/error-code-p2302.33345/

Anyways here is the firing order.

You must be registered for see images attach

Spark plugs should be changed first and set gap correctly. Only use the NGK copper core in pic.

You must be registered for see images attach

If it needs a new coil it should be replaced with a new Mopar which is always best if possible.
If it's over 100,000 miles I'd replace all 6, I got away with the Standard # Uf 270, works good.

Code P0157 check wiring first "downstream" bank 2 For the new 02sensor use only Mopar or NTK sensor only.

xc_hide_links_from_guests_guests_error_hide_media

 

[416kJ]

Welcome to the forum !
Your photo shows 1 of 3 codes what's the other code?
P2302: https://www.obd-codes.com/p2302
Marlon from assembly plant also recommended Checking the wires going to ignition coil #1. See if they're nice and tight and not frayed or rubbing against something.
See post 2: https://www.jeepkj.com/threads/error-code-p2302.33345/

Anyways here is the firing order.

You must be registered for see images attach

Spark plugs should be changed first and set gap correctly. Only use the NGK copper core in pic.

You must be registered for see images attach

If it needs a new coil it should be replaced with a new Mopar which is always best if possible.
If it's over 100,000 miles I'd replace all 6, I got away with the Standard # Uf 270, works good.

Code P0157 check wiring first "downstream" bank 2 For the new 02sensor use only Mopar or NTK sensor only.

xc_hide_links_from_guests_guests_error_hide_media

Thanks for the welcome &, thanks so much for you’re help !!so here’s what happened I actually did an engine wash a few days ago and thats when all symptoms started happening (ran smooth before) upon investigation I realized water got into the coil so I decided to take out all coils and plugs and blow them dry , I also changed the spark plugs at the same time and cleaned off all the ignition coils , problem solved yay
I also used the zfr6f-11g plugs as recommended runs so much better they had the old factory plugs from before

I will be having a look at the o2 sensor tomorrow, do you recommend ngk brand as a replacement sensor?

oh and the 3rd code is just a repeat code of the P2302 code (cheapy scanner) :/

all help appreciated
Thanks LibertyTc (cheers)

 

[LibertyTC]

It is so important in the forums that we have a clear description of the issues & what may have taken place right from the beginning.
Anyways, I'm glad you have new correct spark plugs & the misfire solved.
The Mopar o2 sensor would be best, or NGK/NTK sensor will work well in the KJ too.