o2 sensor codes ..opinions please
03-13-2017, 06:56 PM
#1
Racer
Thread Starter
o2 sensor codes ..opinions please---- FIXED
the engine light came on last night...05 c6 long tube headers
have been on since i bought it
tech 2 says
pd0030 heater ontrol circuit bnk 1
pd0134 ho2s circuit insufficients activity banks 1 sensor 1
pg0135 heater performance bank 1 sensor 1
i know there are other things that can cause these codes
i checked fuse number 6, its good
im thinking the O2 sensor has died..but would like yalls input before i just buy another one..im going to replace them both..
i havent looked under the car yet for burned wired or melted wires next to the header
i cleared the codes and they came back immediately on startup... there other codes for the airbags which the light on the dash comes up...only in cold weather then goes back out if i restart.
have been on since i bought it
tech 2 says
pd0030 heater ontrol circuit bnk 1
pd0134 ho2s circuit insufficients activity banks 1 sensor 1
pg0135 heater performance bank 1 sensor 1
i know there are other things that can cause these codes
i checked fuse number 6, its good
im thinking the O2 sensor has died..but would like yalls input before i just buy another one..im going to replace them both..
i havent looked under the car yet for burned wired or melted wires next to the header
i cleared the codes and they came back immediately on startup... there other codes for the airbags which the light on the dash comes up...only in cold weather then goes back out if i restart.
Last edited by 1hander; 03-17-2017 at 06:24 PM.
03-13-2017, 07:22 PM
#2
Racer
Thread Starter
i looked at 02 activity... the base MV or .435 or so is present at both 02 circuits, sensor bank 2 sensor fluctuates quite a bit when i play with throttle say .34 to 768 or so... bank one fluctuates very little and just kinda sits at 684 or so
03-13-2017, 09:03 PM
#3
Racer
Thread Starter
ive looked at all threads with the upper codes ...
since its not a blown fuse the fuse....
there is no short...
the readings from the O2 screen between the two sensors are radically different
the voltage on o21 does not respond well
o2 sensor 2 bank 1 is working right
the problem is isolated to sensor 1 bank 1
either the connector has backed out at the sensor or the sensor is bad...
i will check the connector... if good order an ac delco 02 sensor
and report back
since its not a blown fuse the fuse....
there is no short...
the readings from the O2 screen between the two sensors are radically different
the voltage on o21 does not respond well
o2 sensor 2 bank 1 is working right
the problem is isolated to sensor 1 bank 1
either the connector has backed out at the sensor or the sensor is bad...
i will check the connector... if good order an ac delco 02 sensor
and report back
03-14-2017, 09:27 AM
#5
Race Director
Member Since: May 2004
Location: Raleigh, NC
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St. Jude Donor '15
03-14-2017, 09:53 AM
#6
Drifting
If you have a failed heater in the sensor, it's toast anyhow. Upstream sensors should show a plenty of activity. If one is pretty steady (bad) and the other is healthy (good), safe to say the sensor is bad (taking into account the wiring, heater circuit, etc is good as you stated earlier).
Are there cats on the car?
Are there cats on the car?
03-17-2017, 06:26 PM
#7
Racer
Thread Starter
it was the O2 sensor... i replaced both and kept the working one as a spare.. seems to run a bit smoother and the exhaust doesnt smell as rich...the fuel trims are getting down closer to zero..they were at 8 ..thanks for the helps guys
Last edited by 1hander; 03-17-2017 at 06:46 PM.