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
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.
SOURCE: 2000 chevy runs rough
fuel pressure regulator might b leaking .. pull vacuum line off of it and see if there is fuel.... if soo replace it
SOURCE: 1998 Chevy s10 4 cylinder running rough
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
SOURCE: 98 chevy s-10 codes p0131, p0171, and p1133
http://www.obd-codes.com/
go there look up the codes there all there
SOURCE: where is the bank 2 sensor 1 located.
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.
SOURCE: Code p0141 02 Sensor Heater Circuit Malfunct Bank #1 Sensor2
after the catalytic converter on the driver side in the exhaust pipe.
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