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Keep getting the error P0037 on my ST, put the EML light on but car still drives fine when it's on.

Cleared it once and it came back after 5 miles.

Any ideas what i means? Happened straight after my event here which turned out to be a fuse: http://www.focusstoc...d-during-remap/

Think it is related to Heater Control Circuit Low - Bank 1 Sensor 2 but what is this?
 

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Discussion Starter · #3 ·
Faulty or because of the cat?

And is it after the cat as towards the back of the car?
 

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Discussion Starter · #6 ·
Could just be the sensors had it.

What mods are you running other than the DS map
modx, decat, scorpion cat back non res, rs injectors, cais

i didn't think there was a sensor after the cat, there's one in the down pipe and in the cat (my case decat).

what sensor is likely to be faulty?
 

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It's a different fault code when its emissions related.
4 wires, 2 for the signal to the ecu and the other 2 are for the heater circuit 12v + and a earth.
I think there is a fuse for the heater circuit, mite be worth a look.
 

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Discussion Starter · #13 ·
ah fuse, you may have it, i was in the fuse box in the engine bay when my obd port fuse went, couldn't figure out from the diagram what fuse was for the obd port, so i removed, checked and replaced every fuse one by one, i may have put a fuse back in the wrong place.

then i discovered there is a fuse box under the passenger footwell with the obd fuse in.

what fuse would i be looking for?
 
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