Wull

Heater control circuit

Low bank 1 sensor 2

Now as far as I’m aware that’s the sensor to the rear, not the one that’s fitted to the headers but someone has pointed out that this description of the code is not accurate, e.g the use of heater circuit and sensor 2 as that sensor is not part of the heater circuit.....whether that’s true or not I’m not sure and whether it matters I’m not sure as the code seems to be for the rear sensor.

Can anyone shed any light on this as to why it would describe the sensor 2 as being part of the heater circuit when it’s apparently not?

1509joe

iTrader: (2)

Its the rear sensor if it has 3 or 4 wires it has a heater.

Don Clark

Nothing to do with the cars heater.
Each lambda sensor in the exhaust, be it, the A/F sensor in the manifold or the after cat oxygen sensor, it has it's own heating circuit to bring it upto working temperature quickly.

1509joe

iTrader: (2)

Less of it

Don Clark

http://www.autotap.com/techlibrary/u...en_sensors.asp

Wull

I was told the rear sensor doesn’t have the heater, hence why it’s supposedly not an accurate description “heater circuit low bank 1 sensor 2”......but is the heater circuit just a generic description regardless of whether sensor 1 or 2 is faulty or does the rear sensor have in fact, the heater?

1509joe

iTrader: (2)

Yes they both have heaters as Don says. As a rule if an 02 sensor has more than 2 wires it has a heater It is quite possibly fused and you can test if you have power at the plug.

Wull

I don’t have a rear sensor as it’s running full decat, I’ve only got a front sensor so I presume it’s not been properly mapped out hence why it’s still coming on.

I sent the picture above to someone and they mentioned that it was a conflicting description which got me thinking, but you folk have confirmed otherwise and after googling it most others who have had the same P0037 code the description was the same on their scan tool....”heater circuit bank 1 sensor 2”.....

1509joe

iTrader: (2)

Was actually thinking that do you not use that car for track work. Was wondering why you still had a cat in place. If the cat isn't there then the sensor is obsolete so you need it mapped out otherwise cel. You could mess about with resistors but a pain in the ****.

Don Clark

RAGGY DOO

iTrader: (1)

These scoobys seam
To eat lambda sensors hope u get it sorted soon bud