It should be on the slip. It will start with a "P" followed by four-digit number. These are some of examples for heated oxygen sensor for Bank 1 Sensor 2.
P0036 HO2S Heater Control Circuit (Bank 1 Sensor 2)
P0037 HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
P0038 HO2S Heater Control Circuit High (Bank 1 Sensor 2)
P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)
P0140 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
P0141 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
Bank 1: Bank means cylinder head. In your case, you only have one bank (Bank 1). Locate your exhaust pipe. Sensor 1 is the one by the exhaust manifold and sensor 2 is the one after the catalytic converter. Sensor 1 sometimes is also called pre-cat sensor, and Sensor 2 called post-cat sensor. You have go under the car, locate the cat in the exhaust pipe, and you should see a 4-wire sensor attached to the exhaust pipe.
Wednesday, January 21st, 2009 AT 5:35 PM