How many O2 sensors does this model have. Its the 1.5 engine.

I need year--make--model--engine size to look up wiring for 02 sensor circuit. Could be sensor connector--wiring--or a fuse where applicable?

One would need the year, make, model, and engine size to tell you exactly where they are and how many.

O2 sensors are always in the exhaust stream, either in the exhaust manifold that is attached to the engine, or in the exhaust piping after the exhaust manifold. Some models have one for each bank of the engine, and some have only one sensor to monitor oxygen content. These engine sensors that the computer uses to "fix" or adjust the air/fuel ratio are called the upstream oxygen sensors. If the car is equipped (as most are today) with an oxygen sensor after the catalytic converter, this is called a downstream oxygen sensor. They are the same and do the same thing, but the downstream sensor is only used to monitor the efficiency of the converter. The upstream sensor(s) are what the computer reads to adjust or "trim" the fuel delivery.

So some older cars have only one o2 sensor. Not far from the engine in the exhaust stream. Some newer cars with dual exhaust (2 converters) may have four o2 sensors. 1 for each bank of the engine and 1 behind each catalytic converter. A 2005 Buick Century with a 3.1L engine, for instance, has only two o2 sensors: one (upstream) in the exhaust down pipe, and one (downstream) just behind the catalytic converter.

P1087 BMW - O2 Sensor Circuit Slow Response in Lean Control Range Bank 1 Sensor 1
Possible causes
- Faulty O2 Sensor Bank 1 Sensor 1
- O2 Sensor Bank 1 Sensor 1 harness is open or shorted
- O2 Sensor Bank 1 Sensor 1 circuit poor electrical connection


Read more: http://engine-codes.com/p1087_bmw.html#ixzz3AD8uz7pb

Ford OEM Motorcraft parts and vanity license plates

If this is a V6 model, Bank 1 would indicate one side of the motor. Also, if it's the V6 model, I believe there are 3 O2 sensors, one per Bank, and one downstream(post-cat). If it is the V6 model, and it indeed is Bank 1, then just replace the O2 sensor, that's the most likely cause.

Hi Adam, I believe the most cost effective action for you is to get the management system designed for your engine. When doing so it may well be required that you also purchase the wiring harness that goes with the replacement unit. Regards John

this is how it goes, this car all depending on the engine size can have 2 or3 or 4 sensors,

sensors are labeled bank 1 sensor 1 or bank 1 sensor 2 and then bank 2 sensor 1 or bank 2 sensor 2.

sensor 1 on either bank is the front sensor before converter closest to engine.
sensor 2 either bank would be the rear sensors after the converter.
bank means which side of the engine,

bank 1 is the side in which the # 1 cylinder is on,
For example a 4 cylinder engine would have the bank1 sensor 1 on the top of the exhaust before the converter and bank1 sensor 2 would be down on the exhaust after converter. it may not have a bank 2. but newer 4cyl are starting to have bank 2

A v-6 engine would have 4 o2 sensors with same concept except one on each side of engine and then one at rear unless using two converters then one after each converter.

if you do not understand this then tell me year,make model and engine size and the complete code like bank 1 senser1 and i will tell you exactly where it is. good day.

which one are you referring too.? bank 1 sensor one is on the right side of the engine, while bank 2 sensor one is on the left side of the engine. there are also o2 sensors past the catalytic convertors on each side depending on the year,make and model and engine size.

did you replace the oxygen sensor?

P0134....O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

P0135....O2 Sensor Heater Circuit (Bank 1 Sensor 1) heater in the O2 sensor has packed up first sensor before the cat