You can doublecheck this at any library's computer because they have a nationwide license for the sw for all cars and makes and models. But offhand, they are usually down past the exhaust manifold. Some under the car. Some can have two for dualexhaust which could be yours. If it's never been replaced before now is a good time. They used to say replace them every 79k, IIRC.
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That code refers to a fault in the circuit for Oxygen Sensor Heater Circuit (Bank No. 1 Sensor No. 1).
Bank 1 is the same bank where the #1 engine cylinder is located, so the passenger side and the sensor #2 is the second O2 sensor back and is usually found after the catalytic converter,
code p 0135 refers to heated oxygen sensor (HO2S) ) 1 bank 1, heater control---circuit malfunction====causes --fuse--wiring--HO2S--ECM
heated oxygen sensors are located in the exhaust manifold or exhaust pipe before the cat converter bank 1 is closest to the fire wall
use the proper sensor tube spanner as the wires are delicate and easily broken when removing or installing the sensor
P0134 - O2 Sensor Circuit No Activity Detected Sensor 1 Bank 1
P0135 - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1
P0053 - O2 Heater Resistance Bank 1 Sensor 1
P0030 - O2 Heater Control Circuit Bank 1 Sensor 1
You need to replace the O2 Sensor Bank 1 Sensor 1
Carquest can help you get the correct part and help you locate it.
error codes p0156 (02 sensor circuit malfunction) ( bank 2 sensor 2) & p0161 (02 sensor heater circuit) (bank 2 sensor 2 ) are related. The faulty heater in the sensor will cause the PO156 to set as well. Bank 2 sensor 2 will be located on the drivers side after the converter.
Sounds like there is an issue with the heater on the bank 1 sensor 1 O2 sensor.
Bank one is the same side of the engine as the number one cylinder and sensor one is always before the catalytic converter.
Check for battery voltage on the black with yellow wire with the key on. There should be twelve volts.
Check the heater circuit of the O2 sensor with an ohm meter. Unplug the O2 sensor connector and measure resistance on the sensor side of the connector that the blue with black and black with yellow wire go to. Off the top of my head it should be around 14 ohms. You can confirm this by checking the heater circuit on the bank 2 O2 sensor.
If there is voltage and the heater circuit doesn't ohm out than replace the O2 sensor.
Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!
sensor 1 is the first 02 sensor in the exhaust.bank 2 is the side of the motor that cylinder #1 is NOT on,in this case bank 2 would be on the passenger side(right side) of the motor.which means the first 02 sensor in the exhaust on the passenger side of the motor
code is not for heater circuit, code p0141=O2 Sensor Heater Circuit Bank 1 Sensor 2 that means its an oxygen sensor located in bank 1 which is the drivers side,sensor 2 means its the downstream sensor after the convertor