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Upstream Oxygen Sensor heater performance. That will be the first oxygen sensor in the exhaust pipe ( closest to the engine ) on the passenger side head.
You need to check the wireing connector that hooks to the oxygen sensor for a broken wire are bad connection. If you find no problems, then replace oxygen sensor.
What else can I help you with?
How many lug nuts does a 2001 gmc 2500 sierra have?
8
What is a p1404 code?
check engine light code on my 2001 gmc truck
What is code p1404?
check engine light code on my 2001 gmc truck
Where can you find a Wiring diagram 2000 gmc 2500?
wiring diagram for GMC 2500?
Where is O2 heater circuit bank 2 sensor 1 on a 2005 GMC Jimmy code P0155?
On a 2005 GMC Jimmy, the O2 heater circuit bank 2 sensor 1 refers to the upstream oxygen sensor located on the exhaust system, specifically on the passenger side before the catalytic converter. You can find it mounted on the exhaust manifold or near the front of the vehicle’s exhaust pipe. Code P0155 indicates a problem with the heater circuit for this sensor, which may require checking the wiring, connectors, or the sensor itself for faults.
Is a 2001 gmc 2500hd differential the same as 2004 2500 hd duramax diesel differential?
vin plate
What rear differential is in a 2001 GMC Sierra 2500 HD 6.6 Duramax diesel truck?
Mine is 3.73 semi slip
What is the spark plug gap for a 2006 GMC Sierra 2500 6.0 liter?
What is the spark plug gap for a 2006 GMC Sierra 2500 , 6.0 L
What is the average gas mileage for a 1991 gmc vandura 2500 with a v8?
I just drove from Ohio to Arizona with a 1989 GMC 2500 and averaged 15.5 mpg.
What transmission does a 1985 GMC 2500 truck have?
700r4
What is the trailer towing capacity for a 2001 GMC 2500 truck?
That All depends on the motor and rear-end and if it is a 4x4 and ext cab or not . It should tell you in the glove box.
Where would You locate the ECM on a GMC Vandura 2500?
The ECM on the Vandura 2500 is under the Driver's seat.
