Question about 2001 Chevrolet Silverado 1500
My truck is stalling with DTC codes indicating problems with these two o2 sensors. Auto parts guy advised me to clean these 2 o2 sensors, but I do not know where they are located. Is removal and cleaning advisable for a novice?
Hi T, Oxygen sensors are fitted into the exhaust manifolds. These sensors measure the amount of unburned oxygen left in the exhaust gas after ignition and if there is too much the sensor sends a signal to the ECU and the injection period is reduced, thereby reducing the amount of fuel. Look at the two manifolds and each will have a sensor connected with a cable. After cleaning or replacing the sensors and you find the fault remains, have another scan carried out and have the fuel pump pressure checked and replace the fuel filter. If when all this has been done let us know if the engine still stalls, and we will try a few other things. Happy new year and regards John
Posted on Jan 01, 2013
The 02 Sensors are located in the exhaust pipe passenger side behind the catalytic converter. you'll see the wires on each one, you may have as many as four base on your engine size.
Posted on Jan 01, 2013
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Posted on Jan 02, 2017
1- check there is spark come from spark wires
2- check the fire timing by looking for every wire in the right place
3- check there is injector signl
4- check for any vacuom leak
5- try to clean the MAF by brake and parts cleaner
6- try to reset all the code and see what will come after that
Posted on Mar 14, 2009
Oxygen sensors are always numbered like this:
Bank 1 sensor 1
Bank 2 sensor 1
Bank 1 sensor 2
Bank 2 sensor 2
some manufacturers use a kind of shorthand that reads different, but means the same thing:
Sensor 1/1 or O2s 1/1
Sensor 2/1 or O2s 2/1
Sensor 1/2 or O2s 1/2
Sensor 2/2 or O2s 2/2
Bank 1 is always the side of the engine where cylinder number 1 is located and, of coarse, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only 1 bank and it is always referred to as Bank 1.
Sensor 1 is always the upstream sensor (The one located BEFORE the catalytic converter)
Sensor 2 is always the downstream sensor (the one that is located AFTER the catalytic converter.
Most GM engines have #1 cylinder located on the left bank, (or Driver's Side) of the engine,
So, the answer to your question would be that you are looking for the sensor located before the catalytic converter on the right (or Passenger Side) of the truck.
Posted on Oct 17, 2009
Tips for a great answer:
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P0141....O2 Sensor Heater Circuit (Bank 1 Sensor 2)
P0142....O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)
P0143....O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)
P0144....O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)
P0145....O2 Sensor Circuit Slow Response (Bank 1 Sensor 3)
P0146....O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3)
P0147....O2 Sensor Heater Circuit (Bank 1 Sensor 3)
P0340....Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)
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