O2 Sensor Heater Problem

[ack2000blazer]

ok so after all that the check engine light has come back. What should i look at next?

Alex

[old_master]

Have your friend check "I/M Readiness" status on his scan tool. Make sure all monitors are complete. If not, perform a drive cycle to force them to complete: http://www.obdii.com/drivecycle.html If they are complete, retrieve all DTC's and post them in the order they are retrieved.

[ack2000blazer]

Hello,

Sorry for the long delay, so i got the scanner and belive i checked the right thing.
This is what it said:
Bank one sensor one 02 heater circuit malfunction P1035

Thats what it said under the I/m readiness but dont seem right?
Does that help?

Thanks

Alex

[MT-2500]

Originally Posted by ack2000blazer

Hello,

Sorry for the long delay, so i got the scanner and belive i checked the right thing.
This is what it said:
Bank one sensor one 02 heater circuit malfunction P1035

Thats what it said under the I/m readiness but dont seem right?
Does that help?

Thanks

Alex

What do you think is not right?

If code was cleared and came back after driving ten you have a problem for that code.
Check voltage and ground and wiring/plugin for that sensor.

[ack2000blazer]

ok so i did some reading up and figured out that you are looking for what service are ready and not ready so this is what i found

Not ready
Catalyst
Evap sys
Ho2 sensor

Not applicable
Ac refrig
Sec air
Heated cat

Does that help?

[MT-2500]

Originally Posted by ack2000blazer

ok so i did some reading up and figured out that you are looking for what service are ready and not ready so this is what i found

Not ready
Catalyst
Evap sys
Ho2 sensor

Not applicable
Ac refrig
Sec air
Heated cat

Does that help?

That is telling you you have not drove it enought for the computer to do all of it testing.
Like cat test and 02sensor test and EVPA system.

If all codes were cleared drive it long enought for the computer to run all test and then chek forwhat codes you have.
Post back code no that comes back.

[ack2000blazer]

Ok so i just did a drive cycle and it must have worked becuae all I/M readiness everthing is eaither ready or not applicable, However the check engine light is still on. So do i need to clear the code? or do another drive cycle test or just leave it for a bite and see if it clears.

I dont want to clear it just for it to come back again and have to start over again.

Thanks again..

Alex

[MT-2500]

Originally Posted by ack2000blazer

Ok so i just did a drive cycle and it must have worked becuae all I/M readiness everthing is eaither ready or not applicable, However the check engine light is still on. So do i need to clear the code? or do another drive cycle test or just leave it for a bite and see if it clears.

I dont want to clear it just for it to come back again and have to start over again.

Thanks again..

Alex

I am sorry if that is to much work and trouble for you.
BUT.
Clearing codes after repair is just part of the repair procedure.
Clearing codes lets the VCM go threw all of it self test and then it can tell you if every thing is A OK
Clear code and drive it and if code comes back you still have a problem.
If it runs good and no codes after self test and no check engine light all is well.

[ack2000blazer]

Ok i cleared the codes a few days ago and now the check engine light has come back!
I scanned it and got the same code p1035 bank 1 sensor 1.

I/M says either ready or not applicable.

Any further info would help..

Thanks..

[MT-2500]

Originally Posted by ack2000blazer

Ok i cleared the codes a few days ago and now the check engine light has come back!
I scanned it and got the same code p1035 bank 1 sensor 1.

I/M says either ready or not applicable.

Any further info would help..

Thanks..

P1035 or P0135?
Was it a present or history code?
P0135 is heater circuit for bank 1 sensor 1.

Recheck voltage to sensor and ground and wiring and plugin.
Have you by passed the plugin with soldered wires?
What is the voltage reading to sensor?

Switch 02 sensors and see if problem moves with sensor switch.

The code can also be caused by MAF sensor and several other sensor problems to.
Make sure all other sensors are in good working order.

There is a repair flow chart for that code in All Data and mitchell and GM repair manuals.
If all else fails get the repair flow chart for that code and go all of the way threw it untill you find the problem.

Let us know what you find.

[ack2000blazer]

ok so i had time again to get back in to this. I have pulled the O2 sensor out and put in a know good one. I also checked continuity from o2 connector to sensor and i dont believe black is the ground i think its gray because from the gray wire to the body of the connector i got continuity. see the pictures its a bosh 15703 sensor.

Also the sensor is all black, i spoke to someone and they said this is a sign of coolant getting in to the engine and it needs a new intake casket.

Alex

[MT-2500]

Originally Posted by ack2000blazer

ok so i had time again to get back in to this. I have pulled the O2 sensor out and put in a know good one. I also checked continuity from o2 connector to sensor and i dont believe black is the ground i think its gray because from the gray wire to the body of the connector i got continuity. see the pictures its a bosh 15703 sensor.

Also the sensor is all black, i spoke to someone and they said this is a sign of coolant getting in to the engine and it needs a new intake casket.

Alex

Black on body wiring plug in is back/ground.
Bank one sensor one is grounded to left rear cylinder head.
Bank one sensor 2 is grounded right front engine block.
The o2 sensor has a different color code.

What code no are you getting?

Is sensor is black on tip engine is running rich.
Oily or wet on end you have other problem.

What parts place are you getting sensor and sensor no from?

[ack2000blazer]

Drove the truck to work today about 7 miles, when leaving working check engine light came back on. Its code P1305 which is bank one sensor one( driver side sensor ). But no code for the o2 sensor that is missing which is the first one on the passenger side. So something major is wrong. I am either working on the wrong sensor, or something is miss wired back to the computer module. Any ideas?

[tempfixit]

Originally Posted by ack2000blazer

Drove the truck to work today about 7 miles, when leaving working check engine light came back on. Its code P1305 which is bank one sensor one( driver side sensor ). But no code for the o2 sensor that is missing which is the first one on the passenger side. So something major is wrong. I am either working on the wrong sensor, or something is miss wired back to the computer module. Any ideas?

P1305ChevroletIgnition Coil 2 Primary Feedback Circuit

[Tech II]

If we are talking about P0135, disconnect that sensor....attach a test light to the "heater circuit" on the harness side leading to the VCM.....start the vehicle(cold) and see if the test light, lights....the purpose of the heater circuit is to get that sensor up to temp quickly, so that it will start operating sooner and the engine goes into closed loop faster.....this code sets when the VCM sees that it is taking too long for that sensor to start operating....the code has nothing to do with the MAF.....

If it doesn't light, that fuse and circuit has to be checked out.....if nothing wrong, then we may be talking VCM....