Last post on Aug 06, 2012 at 8:16 PM
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Chevrolet Blazer, GMC Jimmy, SUV
#16 of 80 2002 Chevy Blazer Oxygen Sensor Replacement
Dec 04, 2007 (10:15 am)
I recently had my check engine light come on and upon checking it with a pocket scanner came up with a DTC P0155 (O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1). My Chilton Manual says my 2002 Chevy Blazer 4.3L V6 has more than one oxygen sensor. My questions are
1. Is this the sensor located on the exhaust pipe near the catalytic converter?
2. Is this difficult to replace?
3. Any tips to make the job easier (special tools, etc.)
#17 of 80 Re: 2002 Chevy Blazer Oxygen Sensor Replacement [lancej]
Dec 09, 2007 (3:38 pm)
Hi Lance. I think you are right about the sensor location near the converter. I usually go to Auto Zone for diagnosis and parts. They can tell you exactly where it is located and the part is about 1/3 of a GM replacement sensor. I buy Bosch replacements for my 96. It's a simple job. Just unplug it from the wiring harness and use an open end wrench. Start it up first and let it run for a couple minutes before changing the old one. This helps break the old one loose. Don't run it too long or you'll burn yourself. The new sensor usually has anti-sieze already applied to the threads. If not buy a small tube. It makes future replacement much easier.
If you have a set of ramps you can drive up on them for easier access. I usually don't use them and don't have a lot of trouble if I suck my belly in.
#19 of 80 multiple dtc codes 1999 blazer
Dec 21, 2007 (5:23 pm)
i have codes po131, po151, and po300
any suggestions on what I need to check?
Jan 02, 2008 (4:21 pm)
I have a 93 chevy blazer,can't really afford a diagnostic check so I had a friend do it for me at work,the codes are 32,33,35,45 can anyone tell me what they mean,please cause I can't find anyone to help me
Jan 05, 2008 (5:19 am)
35-iac (idle air control) valve
45-o2 sensor (rich fuel mixture)
sounds like you should have a performance problem. If i could suggest... IF truck is running o.k. right now, clear codes out, drive for a day, recheck your codes. you have so much going on there with the codes, and you don't know if they all came about at the same time, or not. maybe one or two have been present for weeks,months,etc. just disconnect neg. side of battery for minute or so to clear codes. then drive it for a day, making sure you start and stop engine(keystarts) approx. dozen times. have friend check codes again. it's possible that one major problem kicked other codes on, in response to the original problem(i hope your able to follow my dribble this would be the least expensive way, rather than replacing all that shows bad. it's possible not all sensors,etc. are bad...
i hope i helped.
#22 of 80 2001 Chevy Blazer Service Engine Soon Light
Jan 14, 2008 (3:14 pm)
My "service engine soon" light came on a couple of days ago and has stayed on. I tried taking off my gas cap and putting it back on tightly, but it still is on. My other gauges show normal readings and I haven't noticed any other problems yet. I live in Kentucky and do not have to test for emissions here. Could it be anything else? Any ideas would be appreciated.
#23 of 80 Re: 2001 Chevy Blazer Service Engine Soon Light [renoky]
Jan 15, 2008 (6:01 pm)
you need to get a diagnostic check. If you don't have access to a diag. tool, I believe autozone does that for free. Get the trouble codes stored in the pcm out so you know where to start...could be one of hundreds of problems.
Jan 18, 2008 (11:02 am)
OK FIRST CAR GAVE ME CODE FOR MISSFIRE #1CYLENDER CODE CLEARED THEN 2OR3 DAYS LATER CAR WAS RUNNING JITTERY ON THE FREEWAY AT CRUISING SPEED PUT INJECTOR CLEANER IN DROVE FOR THIRD OF TANK STARTED HAVING LACK OF POWER THEN POWER WOULD KICK BACK IN AND DRIVE FINE. I PARKED , THEN CAME BACK 2 DAYS LATER CAR FIRED ON 1 OR 2 CLENDERS THEN DIED CHECKED FOR CODES NO CODES CRANKES BUT WONT START. FUEL TO RAIL SPARK NEW CAP ROTOR PLUGS USED STARTING FLUID DOWN THROTTLE BODY NO START, NO CODES WOW I AM AT A LOSS IS IT THE ECM OR JUST THE CRANK SENSOR OR ONE OF THE OTHER SENSOR OR A COBO OF SENSORS BUT WHY IS THERE NNO CODES GIVEN
#25 of 80 Re: no code [roddoghd]
Feb 09, 2008 (8:01 am)
Well, if the crank sensor is not working you should get a code 0335 or 0336. And if the sensor has completely died, she ain't gonna start.