I need to know what pins on the connectors and the pins on the ECM. I need to check and test for wiring problems with the upstream o2 sensors.
Dec 18, 2022 at 1:00 AM
codes P0135 and p0154, upstream o2 sensors?
2000 GMC SIERRA
DAYSTEVE40
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Hi,
I attached the entire wiring schematic for the powertrain management circuits. I highlighted all wiring related to the oxygen sensors.
Take a look through the schematic and let me know if this helps or if you have other questions.
Take care,
Joe
See pics below. Note: The schematics were 5 pages long. I cut each page in half to make them readable for you. I also overlapped them so you can follow from one to the next.
I attached the entire wiring schematic for the powertrain management circuits. I highlighted all wiring related to the oxygen sensors.
Take a look through the schematic and let me know if this helps or if you have other questions.
Take care,
Joe
See pics below. Note: The schematics were 5 pages long. I cut each page in half to make them readable for you. I also overlapped them so you can follow from one to the next.
Images (Click to enlarge)
Dec 18, 2022 at 1:41 PM
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