O2 Sensors

[john_mchutchison]

Need to pick smart people's brains about this/these??

My55 sti prodrive. Engine management light on so I got it plugged in and says O2 sensor, can anyone tell me where it is. Iv been told by the mechanic there is maybe 2, is that right? There seems to b 1 on the middle section where the cat should be but there is also one on the manifold, is that true?

[The Don]

Need to pick smart people's brains about this/these??

My55 sti prodrive. Engine management light on so I got it plugged in and says O2 sensor, can anyone tell me where it is. Iv been told by the mechanic there is maybe 2, is that right? There seems to b 1 on the middle section where the cat should be but there is also one on the manifold, is that true?

What code did you get?? It will determine what the problem/which sensor it is.

P0030 HO2S Heater Control Circuit (Bank 1 Sensor 1)

P0031 HO2S Heater Control Circuit Low (Bank 1 Sensor 1)

P0032 HO2S Heater Control Circuit High (Bank 1 Sensor 1)

P0037 HO2S Heater Control Circuit Low (Bank 1 Sensor 2)

P0038 HO2S Heater Control Circuit High (Bank 1 Sensor 2)

Bank 1 sensor 1 - A/F (wideband) sensor in the manifold just before the up pipe

Bank 1 sensor 2 - O2 sensor after the second(missing) cat.

[john_mchutchison]

That's a great help mate cheers. I can't remember the exact code but now I know what it means I'll get it checked again, thx again.

[fai17]

I have a 04 Sti lambda here if it helps.

[john_mchutchison]

Do you know if it's a 4 pin type Peter? I now know its the sensor on the manifold that's faulty.

[john_mchutchison]

The code was p0031, is it fixable or do I need a new sensor?

[The Don]

The code was p0031, is it fixable or do I need a new sensor?

Unless the wiring has been damaged, it's a new A/F sensor......

Depending upon exact Model Year (there is no MY55 that's just when it was registered))

2.0L MY05

SENSOR ASSEMBLY - AIR/FUEL RATIO 22641AA042

2.5L MY06

SENSOR ASSEMBLY - AIR/FUEL RATIO 22641AA211

Edited August 7, 2012 by don

[fai17]

Do you know if it's a 4 pin type Peter? I now know its the sensor on the manifold that's faulty.

I'll check

[The Don]

I'll check

They are both 4 pin but you need the wide band A/F sensor.

[john_mchutchison]

Is there a physical difference between them Don?

[The Don]

Is there a physical difference between them Don?

They would look the same but do different jobs, the A/F sensor being much more expensive.

Probably the cheapest place to by an OEM one......http://www.japanesecarimports.net/parts_info.asp?id=4822&cat=0&sub=0&sec=0&var=0&dc=&gen=&searchKey=22641AA042

Edited August 8, 2012 by don

[john_mchutchison]

Thanks again Don.

[john_mchutchison]

Sorry to bring this up again, BUT, have a chance to get one from a local scrappy for washers but he said i need a special socket to get it of but a mechanic friend said all i need is a ring spanner, can anyone shed some light on this for me?

[thebigfelly]

I think when i got my lambda sensor replaced im sure i saw the guy just unscrew with a spanner

[The Don]

Sorry to bring this up again, BUT, have a chance to get one from a local scrappy for washers but he said i need a special socket to get it of but a mechanic friend said all i need is a ring spanner, can anyone shed some light on this for me?

You can use one of these...........

or

both designed to slip over the wiring

or a 22mm ring spanner if you can feed the wiring through it.

[notsosmall]

Where abouts are you I have the socket?

[fai17]

It's a 4 wire one I have.

[john_mchutchison]

It's a 4 wire one I have.

How much do u want for it Peter?

[john_mchutchison]

Where abouts are you I have the socket?

I got one mate but the scrappy renaged on the deal, thx anyway.

[fai17]

You have mail!