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got an "error code" today


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Old 05-20-2006, 05:52 AM   #1 (permalink)
 
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Default got an "error code" today


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My check engine light came on after a long trip today. When I parked I did the ignition key check and a code came up:

P0141 HO2S Heater Performance Bank 1 Sensor 2

Is this something I should be concerned with? Or is it one of those BS sensor's that dont really mean anything?
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04' KJ Sport 4x4 3.7L Deep Molten Red
BFG 245/75-16 A/T KO|
Rancho shocks/struts | OME spings
Surco upper rack with 4ea KC Slim lights|
PowerTrax No-Slip|
Airaid Throttle Body Spacer|
Magnaflow Cat-Back Exhaust|
Aries brushguard with 2ea Hella 500's|
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Old 05-20-2006, 01:40 PM   #2 (permalink)
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Default Re: got an "error code" today

Originally Posted by bohica-kj
My check engine light came on after a long trip today. When I parked I did the ignition key check and a code came up:

P0141 HO2S Heater Performance Bank 1 Sensor 2

Is this something I should be concerned with? Or is it one of those BS sensor's that dont really mean anything?
Maybe a fluke, but it means the Heated Oxygen Sensor is putting out a code.
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Old 05-22-2006, 08:12 AM   #3 (permalink)
 
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thanks Valvestem....

Hope its not TOO serious

I live in S. Korea, so going to the dealer down the street is out....

I'll get it checked as soon as I can.

Do you have any idea if its an engine or if its an exhaust sensor?

I'd like to do some off roadn' this w/e. but this makes me kinda' nervice
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04' KJ Sport 4x4 3.7L Deep Molten Red
BFG 245/75-16 A/T KO|
Rancho shocks/struts | OME spings
Surco upper rack with 4ea KC Slim lights|
PowerTrax No-Slip|
Airaid Throttle Body Spacer|
Magnaflow Cat-Back Exhaust|
Aries brushguard with 2ea Hella 500's|
http://www.jeepkj.com/gallery/v/bohica-kj/
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Old 05-22-2006, 08:00 PM   #4 (permalink)
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Default O2 Sensor

Originally Posted by bohica-kj
thanks Valvestem....

Hope its not TOO serious

I live in S. Korea, so going to the dealer down the street is out....

I'll get it checked as soon as I can.

Do you have any idea if its an engine or if its an exhaust sensor?

I'd like to do some off roadn' this w/e. but this makes me kinda' nervice


It is both, an engine exhaust temperature sensor. The code being thrown may signify that it is failing. If you have disconnected the negative side of the battery to reset the code, and it still appears on reconnection/restarting, then I'd say it is failing. The diagram will show which one. Being part of an overall engine control system, the sensor is important enough not to let go for too long.
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Old 05-28-2006, 07:56 PM   #5 (permalink)
 
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Sorry Valvestem,
I got busy and almost forgot to say Thanks for the great info and diagrams!!!!
It really helped out. I waited until I got my Magnaflow install, then crawled under and lightly tapped on the sensors and jiggled the wires a bit. Then disconnected the battery for about a min., and it worked GREAT !! The "check engine" light went away and so did the code \/
I'v put about 200 miles on her since the and it hasnt come back.....hope it dosnt.

THANKS AGIAN !!!!!!
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04' KJ Sport 4x4 3.7L Deep Molten Red
BFG 245/75-16 A/T KO|
Rancho shocks/struts | OME spings
Surco upper rack with 4ea KC Slim lights|
PowerTrax No-Slip|
Airaid Throttle Body Spacer|
Magnaflow Cat-Back Exhaust|
Aries brushguard with 2ea Hella 500's|
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Old 05-28-2006, 10:55 PM   #6 (permalink)
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Only, the up stream o2 sensors are important. The down stream o2 sensor just tell the computer if the CATs are working properly. Used as self emission check. You could pull them out and your Jeep would run fine. They don't control the fuel system at all, only the up steam senors do.
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Old 05-29-2006, 03:34 AM   #7 (permalink)
 
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So my code, "P0141 HO2S Heater Performance Bank 1 Sensor 2", Is a downstream sensor, right?
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04' KJ Sport 4x4 3.7L Deep Molten Red
BFG 245/75-16 A/T KO|
Rancho shocks/struts | OME spings
Surco upper rack with 4ea KC Slim lights|
PowerTrax No-Slip|
Airaid Throttle Body Spacer|
Magnaflow Cat-Back Exhaust|
Aries brushguard with 2ea Hella 500's|
http://www.jeepkj.com/gallery/v/bohica-kj/
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Old 12-24-2011, 05:54 PM   #8 (permalink)
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I am having some of the same issues here in my 2004 Liberty V6. I got some advice from the dood at Autozone and it does not seem to corroborate with that of this thread.

can anyone help me out?

the Autozone code reader says: P0137 Definition HO2S12 circuit condition (heated oxy sensor bank 1 sensor 2)

Explanation: powertrain control module uses the O2 sensor to calculate the air/fuel ratio in the exhaust

per diagram: isn't the one throwing code Left Downstream Sensor (1/2) if I am using diagram correct??

after reading this thread, isn't this the downstream sensor? and if so, someone said this does not affect air:fuel. only the upstream sensors. why did the code print out say it does affect it? I tend to believe the people here than this code reader from Autozone??

Secondly, are these sensors the type of part that either works or does not? is there any failing middle ground where it might be advantageous to just replace it? how about brand? some were like $25 each and another was $50 each?

I did rough calcs of stop 'n go MPG's and it seems to be around 15-16mpg. There is about 105k miles on car.

I was leaning towards replacing both upstream sensors...but according to this print out it seems to be down stream? should I do all 4??

can any offer some advice? thanks! you guys rock
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Old 12-31-2011, 05:49 PM   #9 (permalink)
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I am having some of the same issues here in my 2004 Liberty V6. I got some advice from the dood at Autozone and it does not seem to corroborate with that of this thread.

can anyone help me out?

the Autozone code reader says: P0137 Definition HO2S12 circuit condition (heated oxy sensor bank 1 sensor 2)

Explanation: powertrain control module uses the O2 sensor to calculate the air/fuel ratio in the exhaust

after reading this thread, isn't this the downstream sensor? and if so, someone said this does not affect air:fuel. only the upstream sensors. why did the code print out say it does affect it? I tend to believe the people here than this code reader from Autozone??

Secondly, are these sensors the type of part that either works or does not? is there any failing middle ground where it might be advantageous to just replace it? how about brand? some were like $25 each and another was $50 each?

I did rough calcs of stop 'n go MPG's and it seems to be around 15-16mpg. There is about 105k miles on car.

I was leaning towards replacing both upstream sensors...but according to this print out it seems to be down stream? should I do all 4??

can any offer some advice? thanks! you guys rock
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Old 12-31-2011, 06:07 PM   #10 (permalink)
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