I need help. 07 Jeep Liberty Sport with 4 engine codes

[TwoTapper]

P0174, P0175, P0151, and P0152. P0174 and P0175 are both bank 2. I am not a mechanic, but I do have tools. What should I do before taking it to someone? It has a loss of power, and it misfires when I rev it around 3500rpm.
112k miles
3.7L
New catalytic converter 2k miles ago All new spark plugs around 4-5k miles ago

 

[LibertyTC]

Diagnostic trouble codes listed here: https://www.jeepkj.com/threads/generic-chrysler-diagnostic-trouble-code-list.39860/
P0151 2/1 O2 Sensor Shorted to Ground
P0152 2/1 O2 Sensor Shorted to Voltage
P0174 2/1 Fuel System Lean
P0175 2/1 Fuel System Rich
Check electrical connections at 02 sensors.
You may just need to replace the 02 sensors, use NGK/NTK oxygen sensors, jeep will like those.
Don't have the 07 FSM, the 2006 is close to help you though. https://colorado4wheel.com/manuals/Jeep/KJ/2006-KJ-SM.pdf

 

[sleazy rider]

Googling those codes indicate an issue with the upstream O2 sensors or the MAP. Since you’ve recently done the cat, I’d lean towards the O2 sensors. Use an OEM one.

 

[sleazy rider]

Doh! I type too slow. lol

 

[Gyro]

Copper spark plugs?

Gyro

 

[TwoTapper]

Copper spark plugs?

Gyro

they were these
https://www.oreillyauto.com/detail/...ark-plug/7100/4537194/2007/jeep/liberty?pos=9

 

[sleazy rider]

Too high falutin’ for a Liberty. Plain old NGK coppers are what the pros around here highly recommend.

 

[LibertyTC]

Yup KJ needs these.. will make it run great!

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