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P0155 Code...

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Old 08-20-2006, 06:57 PM   #1
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P0155 Code...

This is a 2002 S10, 4.3 engine. Has about 60K miles, and otherwise runs OK.

P0155 ---> 02 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)

Now, what exactly does this mean?...

Thanks, in advance... Robert
Old 08-20-2006, 07:29 PM   #2
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Re: P0155 Code...

Means you need to replace the 02 sensor...
Old 08-20-2006, 08:40 PM   #3
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Re: P0155 Code...

Bank 2=right hand side of motor
sensor 1=1st sensor
Old 08-20-2006, 09:05 PM   #4
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Re: P0155 Code...

Quote: Originally Posted by MadMikeZ28
Bank 2=right hand side of motor
sensor 1=1st sensor
This part I knew...

My concern is if there is any other reason the PCM would set this code other than the 02 sensor heating element being bad.
Old 08-21-2006, 12:04 AM   #5
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Re: P0155 Code...

Quote: Originally Posted by 03flstfi
This part I knew...

My concern is if there is any other reason the PCM would set this code other than the 02 sensor heating element being bad.
I'm sure the codes are specific for a reason (at least most are). Change that 02 sensor and let us know how it goes.
Old 08-22-2006, 11:56 AM   #6
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Re: P0155 Code...

Quote: Originally Posted by 03flstfi
This is a 2002 S10, 4.3 engine. Has about 60K miles, and otherwise runs OK.

P0155 ---> 02 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)

Now, what exactly does this mean?...

Thanks, in advance... Robert
My SES light is on and I have that same code, my truck is an '03 with 50k miles, i was about to just order a new o2 sensor through autozone but the guy at pep boys is tryin to get me to spend $85 on some diagnostic test, he says that just because its throwing that code doesnt mean that the sensor is bad and that this test will tell you exactly what the problem is.

Anyone else have this problem?
Old 08-22-2006, 11:18 PM   #7
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Re: P0155 Code...

The guy at pep boys is just trying to get your money. O2s' were out! You could replace more O2 sensors that oil pressure sensors because they wear out. And besides that I have heard very bad things about pep boys ripping off people with unnessary work. OBDII codes are somewhat specific. All your codes will tell you a specific part and always say also lead to the computer because that is whats controling or getting signals from parts. That guy may try to convince you it needs an ECM.
Old 08-23-2006, 01:44 AM   #8
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Re: P0155 Code...

Quote: Originally Posted by MadMikeZ28
The guy at pep boys is just trying to get your money. O2s' were out! You could replace more O2 sensors that oil pressure sensors because they wear out. And besides that I have heard very bad things about pep boys ripping off people with unnessary work. OBDII codes are somewhat specific. All your codes will tell you a specific part and always say also lead to the computer because that is whats controling or getting signals from parts. That guy may try to convince you it needs an ECM.
Thanks for the feed back, I ordered a new sensor from summitracing

http://store.summitracing.com/partde...5&autoview=sku

I'll put it on this weekend and see how it works.
Old 08-21-2008, 02:00 PM   #9
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Re: P0155 Code...

I am replacing the 02 sensor for Bank 2 sensor 1 on my 2003 ZR2, I noticed in the thead above that the sensor is on the right side of the motor, is that when you are laying under the truck with feet toward the bed?
Old 08-21-2008, 03:38 PM   #10
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Re: P0155 Code...

No. It is while you are seated in the driver's seat.
Old 08-21-2008, 06:29 PM   #11
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Re: P0155 Code...

Just because a code comes up DOESNT mean that the sensor is bad, a leaky fuel injector or one that doesnt open will cause bad running and sensor codes, bad grounds, bad PCM all can cause false codes, but the sensors do wear out and are usually suspect.
Old 08-21-2008, 06:30 PM   #12
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Re: P0155 Code...

Quote: Originally Posted by dooger
Thanks for the feed back, I ordered a new sensor from summitracing

http://store.summitracing.com/partde...5&autoview=sku

I'll put it on this weekend and see how it works.
Did you have to show off your Peter in here man? Griffin that is!
Old 01-30-2010, 01:31 PM   #13
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Re: P0155 Code...

I need to replace the same sensor (Bank 2 Sensor 1) on my 2002 ZR2. For some reason I have only been able to locate 3 of the 4 O2 sensors on my truck. Can anyone help me with pic or advice on how to access this specific sensor.
Old 01-30-2010, 02:39 PM   #14
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Re: P0155 Code...

2 Pre cat, 1 Post cat IIRC.
Old 01-30-2010, 03:15 PM   #15
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Re: P0155 Code...

if it says the heater went out in it..it went out.

Last edited by serpentracer; 01-30-2010 at 03:16 PM.
Old 01-30-2010, 04:02 PM   #16
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Re: P0155 Code...

ok then answer me this im haven almost the same code but mines p0101 i think but i kno it did say bank 1 sensor 1 heater circuit malfuction ive replaced it twice now and same thing after bout 2 days the code pops back up but the last time i had the codes ran 2 days ago i also had a p0135 which said somethin bout the maf or vaf sensor so im thinkin somethin else has to b wrong
Old 01-30-2010, 06:37 PM   #17
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Re: P0155 Code...

Quote: Originally Posted by LBD44
ok then answer me this im haven almost the same code but mines p0101 i think but i kno it did say bank 1 sensor 1 heater circuit malfuction ive replaced it twice now and same thing after bout 2 days the code pops back up but the last time i had the codes ran 2 days ago i also had a p0135 which said somethin bout the maf or vaf sensor so im thinkin somethin else has to b wrong
yeah like the wiring maybe.

btw, P0101 is the MAF sensor. http://www.obd-codes.com/p0101(no wonder it keeps comming on if you replaced the o2 sensor...lol)
P0135 is the o2 sensor heater. http://www.obd-codes.com/p0135

Last edited by serpentracer; 01-30-2010 at 06:41 PM.
Old 01-30-2010, 09:27 PM   #18
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Re: P0155 Code...

i forgot wat the numbers were its been a couple days but i do remeber wat they said was wrong lol
Old 02-21-2011, 11:11 AM   #19
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Re: P0155 Code...

Im getting the same code on my truck, but the guys at the parts store arent able to tell me which sensor is bad. Is there a way to know without taking it to the dealer for a diagnostic?
Old 02-21-2011, 05:06 PM   #20
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Re: P0155 Code...

if you got the same code, then browse through the thread, they already said which 02 sensor it was...the guys at the parts store should be able to tell you too, unless they're just stupid or lazy...lol
Old 02-21-2011, 05:34 PM   #21
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Re: P0155 Code...

Quote: Originally Posted by bosoxfan82
Im getting the same code on my truck, but the guys at the parts store arent able to tell me which sensor is bad. Is there a way to know without taking it to the dealer for a diagnostic?
P0155 indicates a problem with heater circuit of bank 2 sensor 1 (passengers side - before cat).

There's a remote chance the code could be caused by a bad fuse (02 15A fuse - under-hood box), by VCM/PCM, or bad ground wire, but you're pretty well assured replacing sensor will fix the problem.
Old 02-21-2011, 07:57 PM   #22
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Re: P0155 Code...

Quote: Originally Posted by far2grumpy

There's a remote chance the code could be caused by a bad fuse (02 15A fuse - under-hood box), by VCM/PCM, or bad ground wire, but you're pretty well assured replacing sensor will fix the problem.
yup check your fuses and grounds first because there is always that remote chance that the only issue is a blown fuse or a bad ground.. totally agree there i have seen people change there o2 sensor only to find out the code still keeps coming back and the fuse was blown for the o2 sensor and they spent $50+ and it was just a fuse..
Old 08-09-2011, 04:20 PM   #23
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Re: P0155 Code...

Afternoon guys!

I need to get your advice on this post. I replaced the 02 sensor bank 2 sensor 1. Which if I am not mistaking is the pass side sensor BEFORE the cat.

After roughly 300 miles the ses went off....THEN CAME BACK ON the next day.
checked the sensor connections, but will double check.

your experience with return codes would be appreciated!!!!!

g

Quote: Originally Posted by MadMikeZ28
Bank 2=right hand side of motor
sensor 1=1st sensor
Old 08-09-2011, 06:14 PM   #24
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Re: P0155 Code...

also checked the fuses, all good there....

Quote: Originally Posted by gchalifoux
Afternoon guys!

I need to get your advice on this post. I replaced the 02 sensor bank 2 sensor 1. Which if I am not mistaking is the pass side sensor BEFORE the cat.

After roughly 300 miles the ses went off....THEN CAME BACK ON the next day.
checked the sensor connections, but will double check.

your experience with return codes would be appreciated!!!!!

g
Old 08-10-2011, 02:17 AM   #25
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Re: P0155 Code...

Same thing happened on mine and it was the maf sensor...
Old 12-13-2011, 10:50 AM   #26
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Re: P0155 Code...

Guys...just to be certain, because I saw two different responses in this thread....is a P0155 code for the O2 sensor closest to the exhaust manifold, or furthest away? TIA
Old 08-28-2012, 12:01 PM   #27
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Re: P0155 Code...

Hey guys, I have a 2004 S-10 ZR5 4x4. Had a code of P0155, changed O2 on passenger side. Then got a PO135 code, replaced drivers side O2. Was good for a day, now P0155 code is back. Checked voltage and have 12 volts at both sensors. Any help would be greatly appreciated.
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