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 Post subject: P0122 and P0155
PostPosted: Tue Oct 02, 2018 1:30 pm 
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Joined: Tue Mar 20, 2007 1:05 pm
Posts: 1278
Location: puyallup
i am currently getting both of these codes on my 01 xj.

i just swapped my head out due to cracking of the head.

P0122-TPS sensor
P0155 02 sensor bank 2 sensor 1

i swapped the TPS sensor but no change in the code.

doing some searching on the internet i am not seeing anything about getting both these codes at the same time.

this makes me think its something due to wiring possibly.

currently the jeep idles really rough.

anyone with any experience with this?

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01 XJ limited 4.0 5.5 lift 33x12.50 15's clayton long arm clayton trac bar rubicon springs/shackles. dana 30 4.56's yukon zip locker rcv shafts Chrysler 8.25 rear 4.56's detroit locker jcr offroad winch bumper

06 chevy duramax edge programmer 5" mbrp exhaust

65 chevy C10 stepside long box


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 Post subject: Re: P0122 and P0155
PostPosted: Tue Oct 02, 2018 4:27 pm 
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Location: puyallup
i reset the computer and currently the TPS code has only came back. i only drove it around the block a few times so i'm not sure if it has had enough time for the o2 sensor code to come back

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01 XJ limited 4.0 5.5 lift 33x12.50 15's clayton long arm clayton trac bar rubicon springs/shackles. dana 30 4.56's yukon zip locker rcv shafts Chrysler 8.25 rear 4.56's detroit locker jcr offroad winch bumper

06 chevy duramax edge programmer 5" mbrp exhaust

65 chevy C10 stepside long box


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 Post subject: Re: P0122 and P0155
PostPosted: Tue Oct 02, 2018 8:00 pm 
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Joined: Fri Aug 04, 2006 9:08 am
Posts: 5845
Location: North Bend
Vehicle: 98-TJ
Quite possible the O2 code is set from it running poorly. Which is probably from the TP code from what you have said.

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 Post subject: Re: P0122 and P0155
PostPosted: Wed Oct 03, 2018 5:12 pm 
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Joined: Tue Mar 20, 2007 1:05 pm
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Location: puyallup
couple things i did today.

replaced the TPS sensor with a new one. (replaced it with a used one before)

replaced spark plugs in it with the ones that were in the other head. just in case i had bad spark plugs.

put the stock injectors back in it. replaced the stock ones with rebuilt 4 hole ones.

still seeing the same issue.

i currently dont have a check engine light but borrowed the auto parts store scanner and the TPS error was still coming up.

checked the harness i didnt see anything visually that looked like it was an issue.

When i replaced the head i didnt rotate each cylinder to TDC before torquing the rocker arms to spec.

would this cause an issue? i have head of people doing it with going to TDC and not.

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01 XJ limited 4.0 5.5 lift 33x12.50 15's clayton long arm clayton trac bar rubicon springs/shackles. dana 30 4.56's yukon zip locker rcv shafts Chrysler 8.25 rear 4.56's detroit locker jcr offroad winch bumper

06 chevy duramax edge programmer 5" mbrp exhaust

65 chevy C10 stepside long box


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 Post subject: Re: P0122 and P0155
PostPosted: Thu Oct 04, 2018 4:08 pm 
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Joined: Tue Mar 20, 2007 1:05 pm
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Location: puyallup
i did some tps testing today from info here

i currently am only still getting a TPS check engine code.

everything to the TPS tested good. its getting 5 volts and ground tested to 12 volts.

TPS has been changed with a used one from a running cherokee and a new one from the auto parts store

https://troubleshootmyvehicle.com/je...sensor-tests-1

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01 XJ limited 4.0 5.5 lift 33x12.50 15's clayton long arm clayton trac bar rubicon springs/shackles. dana 30 4.56's yukon zip locker rcv shafts Chrysler 8.25 rear 4.56's detroit locker jcr offroad winch bumper

06 chevy duramax edge programmer 5" mbrp exhaust

65 chevy C10 stepside long box


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 Post subject: Re: P0122 and P0155
PostPosted: Fri Oct 05, 2018 2:41 pm 
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whew, finally

Joined: Tue Aug 21, 2007 1:14 pm
Posts: 837
Location: Bonney Lake, WA
Vehicle: '95 YJ
You double checked that you re-installed the big braided ground strap on the back of the head?


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 Post subject: Re: P0122 and P0155
PostPosted: Fri Oct 05, 2018 3:32 pm 
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Joined: Tue Mar 20, 2007 1:05 pm
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Location: puyallup
i didnt originally but i went back and installed it after i fired it up originally

i checked my check engine light after inspecting portions of the wiring and now i have P0122 and P0123 low and high TPS voltage. seems now i need to inspect the wiring further possibly

_________________
01 XJ limited 4.0 5.5 lift 33x12.50 15's clayton long arm clayton trac bar rubicon springs/shackles. dana 30 4.56's yukon zip locker rcv shafts Chrysler 8.25 rear 4.56's detroit locker jcr offroad winch bumper

06 chevy duramax edge programmer 5" mbrp exhaust

65 chevy C10 stepside long box


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 Post subject: Re: P0122 and P0155
PostPosted: Sun Oct 07, 2018 2:58 pm 
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Joined: Tue Mar 20, 2007 1:05 pm
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Location: puyallup
well to follow up on anyone that comes across this in the future. i think i had a couple things go out at the same time. i replace the TPS sensor and it still ran rough after looking at the dash while it was running i noticed the airbag light was on so i replaced the clock spring and still had the same issue but seemed better so i drove it some more just to see if i could get any different check engine light. when i checked again i got missing on 2 cylinders. in a last ditch effort i have another cherokee and thought maybe the rebuilt injectors i got were bad so i swap injectors from my other jeep to this one and boom runs perfect. i just sent an email to the guy i bought the injectors from on ebay to hopefully send them back to get tested again.

_________________
01 XJ limited 4.0 5.5 lift 33x12.50 15's clayton long arm clayton trac bar rubicon springs/shackles. dana 30 4.56's yukon zip locker rcv shafts Chrysler 8.25 rear 4.56's detroit locker jcr offroad winch bumper

06 chevy duramax edge programmer 5" mbrp exhaust

65 chevy C10 stepside long box


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