Question about 2003 Hummer H2
I have a 2003 Hummer H2 w/ 6.0 vortec engine. I had a check engine light come on and read the cod of P0135. So I replaced the 4 02 sensors and reset the system. code came back. Checked the 02 heater fuses and they are both good. What could be wrong?
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Posted on Jan 02, 2017
What you have to do is replace the o2 sensor on bank 1 sensor 1.This is the front sensor on the left side on the exhaust system.Left side is bank 1 and right side is bank 2.Make sure the connections are good first.Usually it`s the internal heater in the o2 sensor.Hope this helps.Good luck.
Posted on Dec 12, 2009
NED TO HAVE THE CODES FOT THE CHECK ENGINE LIGHT READ.THE CODE WIL LEAD U IN THE CORRECT DIRECTION.GET BACK TO ME W/THE CODE.
Posted on May 13, 2009
Check the linkage that goes from the shift lever down to the transmission. It sounds like somewhere along the line, it has become disconnected or has broken.
if that parts are clean then It sounds like you have a shift control solenoid that has high resistance causing the hard shift you describe. Scan the PCM for trouble codes if none are present you could have a internal transmission problem.
Posted on Jul 17, 2009
Left side (number 1 cylinder) in the exh pipe.(Number 1 sensor) Number 2 sensor is AFTER the Cat Converter.
Posted on Dec 30, 2009
Testimonial: "thanks alot man. i kinda figured it out when i went underneath."
SOURCE: hey i have a hummer
Hello: Bank 1 tells you it is the side of the engine that has #1 cylinder (Which on your truck is the drivers side) SENSOR 1 IS THE SENSOR FOR THAT BANK IN FRONT OF THE CATALYTIC CONVERTER. This code tells us the heater in the sensor has a problem. You should replace the sensor. (Experience: I highly recommend a GM part. The GM engine control module is very sensitive to 02 sensors). Make sure the truck end of the harness connector is clean and not damaged. After replacing sensor you will have to have the code cleared. (auto Zone, Advance Auto may can do it and not charge you.
Posted on Jan 08, 2011
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