o2 sensors.
#1
o2 sensors.
Hi, greetings form the UK.
I am new to this forum and have a 2001 blazer RHD here in th UK.
Down to business.
I am getting trouble code P0134 on the engine management light.
This means - 'o2 sensor circuit no activity detected (Bank1 sensor1)
Can anyone tell me where this is?? I guess i need to replace it??
Eveidently there are 3 sensors in bank 1 and 3 in bank 2.
Help would be appriciated.
Dave
I am new to this forum and have a 2001 blazer RHD here in th UK.
Down to business.
I am getting trouble code P0134 on the engine management light.
This means - 'o2 sensor circuit no activity detected (Bank1 sensor1)
Can anyone tell me where this is?? I guess i need to replace it??
Eveidently there are 3 sensors in bank 1 and 3 in bank 2.
Help would be appriciated.
Dave
#2
RE: o2 sensors.
Sorry me again. Before i head off home -
Can someone also tell me where the ERG valve is?? I think it needs cleaned.
I have an odd stall when idle and when at lights it revs itself. Looking at old posts it could be ERG
While i am at it where is the 'idle air control valve' this could need looking into as well.
As i have a right hand drive bear in mind describing where things are....
Thanks and nice to be a member.
Can someone also tell me where the ERG valve is?? I think it needs cleaned.
I have an odd stall when idle and when at lights it revs itself. Looking at old posts it could be ERG
While i am at it where is the 'idle air control valve' this could need looking into as well.
As i have a right hand drive bear in mind describing where things are....
Thanks and nice to be a member.
#3
RE: o2 sensors.
Welcome to the forum.
There's no need to double post, just edit your original.
Here's the O2 sensors to start with....more later, gotta go to work now.
(1) Heated Oxygen Sensors (HO2S) Bank 1 Sensor 2
(2) Heated Oxygen Sensors (HO2S) Bank 1 Sensor 1
(3) Heated Oxygen Sensors (HO2S) Bank 2 Sensor 1
[IMG]local://upfiles/2910/C87F7336DC314B159A912A36DACF207E.gif[/IMG]
There's no need to double post, just edit your original.
Here's the O2 sensors to start with....more later, gotta go to work now.
(1) Heated Oxygen Sensors (HO2S) Bank 1 Sensor 2
(2) Heated Oxygen Sensors (HO2S) Bank 1 Sensor 1
(3) Heated Oxygen Sensors (HO2S) Bank 2 Sensor 1
[IMG]local://upfiles/2910/C87F7336DC314B159A912A36DACF207E.gif[/IMG]
#4
RE: o2 sensors.
If i'm understanding this right, you have a '99 Blazer.
You have 3 total oxygen sensors. B1S1 is the driver's side of the y-pipe, B2S1 is on the passenger side directly ahead of the 'y' in y-pipe on the passenger down pipe. B1S1 & B2S1 directly influence the fuel delivery of the vehicle. B1S3 is the post-cat sensor. For '95-'97, there was also a B1S2 which was a pre-cat sensor, but in something like mid '97 they removed this sensor. B1S2 & B1S3 are used for catalyst monitoring only. Some references name the post-cat sensor B1S2 when there is no pre-cat sensor...
Now, your choices... If you do not have a scan tool to verify the output of the sensors, then you could always attempt to switch the sensors side to side (swap B1S1 and B2S1). Be very careful when removing the sensors as they are fairly easy to damage. Once you have swapped the sensors, unplug the battery for at least 10 minutes. Reconnect and drive it. See if the code comes back. If it does, but indicates that B2S1 is bad, then I would say that the sensor itself is the cause. If, however, it comes back as the same code, then I would be inclined to think there is a possible wiring fault somewhere causing the code.
So... If you end up finding that the sensor is bad, or just don't want to go through all of what is explained above, and decide to just replace the sensor... Do not skimp on the sensor. Please use AC Delco sensors only. Many of us have had issues with the other aftermarket sensors failing prematurely and for the money you initially save, you spend much more if you have to replace it again later.
I believe the AC Delco sensor is an AFS-105 for all 3 locations on our Blazer's. Every once in awhile you'll find someone selling them up on eBay. You can also purchase them from RockAuto.com, but I'm not sure if they ship to the UK... You always have the option of a Chevy dealership, but that'll be more $$$...
Good Luck!
You have 3 total oxygen sensors. B1S1 is the driver's side of the y-pipe, B2S1 is on the passenger side directly ahead of the 'y' in y-pipe on the passenger down pipe. B1S1 & B2S1 directly influence the fuel delivery of the vehicle. B1S3 is the post-cat sensor. For '95-'97, there was also a B1S2 which was a pre-cat sensor, but in something like mid '97 they removed this sensor. B1S2 & B1S3 are used for catalyst monitoring only. Some references name the post-cat sensor B1S2 when there is no pre-cat sensor...
Now, your choices... If you do not have a scan tool to verify the output of the sensors, then you could always attempt to switch the sensors side to side (swap B1S1 and B2S1). Be very careful when removing the sensors as they are fairly easy to damage. Once you have swapped the sensors, unplug the battery for at least 10 minutes. Reconnect and drive it. See if the code comes back. If it does, but indicates that B2S1 is bad, then I would say that the sensor itself is the cause. If, however, it comes back as the same code, then I would be inclined to think there is a possible wiring fault somewhere causing the code.
So... If you end up finding that the sensor is bad, or just don't want to go through all of what is explained above, and decide to just replace the sensor... Do not skimp on the sensor. Please use AC Delco sensors only. Many of us have had issues with the other aftermarket sensors failing prematurely and for the money you initially save, you spend much more if you have to replace it again later.
I believe the AC Delco sensor is an AFS-105 for all 3 locations on our Blazer's. Every once in awhile you'll find someone selling them up on eBay. You can also purchase them from RockAuto.com, but I'm not sure if they ship to the UK... You always have the option of a Chevy dealership, but that'll be more $$$...
Good Luck!
#5
RE: o2 sensors.
ORIGINAL: EnglishBlazer
Sorry me again. Before i head off home -
Can someone also tell me where the ERG valve is?? I think it needs cleaned.
I have an odd stall when idle and when at lights it revs itself. Looking at old posts it could be ERG
While i am at it where is the 'idle air control valve' this could need looking into as well.
As i have a right hand drive bear in mind describing where things are....
Thanks and nice to be a member.
Sorry me again. Before i head off home -
Can someone also tell me where the ERG valve is?? I think it needs cleaned.
I have an odd stall when idle and when at lights it revs itself. Looking at old posts it could be ERG
While i am at it where is the 'idle air control valve' this could need looking into as well.
As i have a right hand drive bear in mind describing where things are....
Thanks and nice to be a member.
#6
RE: o2 sensors.
Oh, sorry... I completely missed the question on the EGR valve and IAC valve. That is why you should always edit your first post cause the 2nd one often gets overlooked...
Anyway, your EGR valve is about the size of a soda can and it is on the front of the engine right above the water pump. It should have 2 bolts holding it to the lower intake manifold and a wire connection on the top of it. You'll want a can of sensor safe carbon cleaner and a new gasket before you pull it off. I find that an old toothbrush makes short work of cleaning the valve.
The IAC valve is on the throttle body. I would recommend that you pull the TB off completely and give it a thorough cleaning. It is just easier to do with the TB off of the engine. Once you have the TB off and the IAC valve out, do not move the pintle of the IAC valve (the part that is inside the TB). Just clean up the pintle and the bore in the TB that it goes into with the carbon cleaner.
Cleaning both the EGR valve and the IAC valve should be considered routine maintenance. Even if they don't help your particular problem, it is still good to get them cleaned up.
Anyway, your EGR valve is about the size of a soda can and it is on the front of the engine right above the water pump. It should have 2 bolts holding it to the lower intake manifold and a wire connection on the top of it. You'll want a can of sensor safe carbon cleaner and a new gasket before you pull it off. I find that an old toothbrush makes short work of cleaning the valve.
The IAC valve is on the throttle body. I would recommend that you pull the TB off completely and give it a thorough cleaning. It is just easier to do with the TB off of the engine. Once you have the TB off and the IAC valve out, do not move the pintle of the IAC valve (the part that is inside the TB). Just clean up the pintle and the bore in the TB that it goes into with the carbon cleaner.
Cleaning both the EGR valve and the IAC valve should be considered routine maintenance. Even if they don't help your particular problem, it is still good to get them cleaned up.
#7
RE: o2 sensors.
Back with more.
1) Throttle Body
(2) Exhaust Gas Recirculation (EGR) Valve
(3) Generator
(4) Evaporative Emission (EVAP) Canister Purge Valve
(5) Manifold Absolute Pressure (MAP) Sensor
(1) Throttle Position (TP) Sensor
(2) Idle Air Control (IAC) Valve
(3) Ignition Coil
(4) Evaporative (EVAP) Canister Purge Valve
(5) Oil Pressure Switch
(6) Knock Sensor (KS)
(7) Fuel Pressure Connection Valve
(8) Positive Crankcase Ventilation Valve (PCV)
[IMG]local://upfiles/2910/CA6EC3864E59491D9824EB52CC2EEF2A.gif[/IMG]
[IMG]local://upfiles/2910/8C8D505193D941DB99D85B50219850A7.gif[/IMG]
1) Throttle Body
(2) Exhaust Gas Recirculation (EGR) Valve
(3) Generator
(4) Evaporative Emission (EVAP) Canister Purge Valve
(5) Manifold Absolute Pressure (MAP) Sensor
(1) Throttle Position (TP) Sensor
(2) Idle Air Control (IAC) Valve
(3) Ignition Coil
(4) Evaporative (EVAP) Canister Purge Valve
(5) Oil Pressure Switch
(6) Knock Sensor (KS)
(7) Fuel Pressure Connection Valve
(8) Positive Crankcase Ventilation Valve (PCV)
[IMG]local://upfiles/2910/CA6EC3864E59491D9824EB52CC2EEF2A.gif[/IMG]
[IMG]local://upfiles/2910/8C8D505193D941DB99D85B50219850A7.gif[/IMG]
#8
RE: o2 sensors.
Thanks everyone....that gives me loads to be getting on with.
I will report back when I have done it.
ps I will do the edit thing in future!!! and I will get round to posting some pics of the RHD soon.
I will report back when I have done it.
ps I will do the edit thing in future!!! and I will get round to posting some pics of the RHD soon.
#9
RE: o2 sensors.
You probably realized this already....due to chevy-lover's posts, but in your case with right-hand drive:
bank 1 sensor 1 is actually on the passenger's side of your truck and bank 2 sensor 1 is on the driver's side.
You have 3 total oxygen sensors. B1S1 is the driver's side of the y-pipe, B2S1 is on the passenger side directly ahead of the 'y' in y-pipe on the passenger down pipe.
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