Ooops, P0443 DTC???

[JamesT5]

Hi

After cleaning the ETM today (story and pictures to follow in a seperate thread), I started the car back up and got the following DTC on the code reader, P0443.............

Attachment 13560

The word 'circuit' suggests it's electrical. I remember plugging in every cable securely (I think).

I wonder if it's anything to do withese these two plugs/wires?....

Attachment 13561

I hope it's something simple! Any help is appreciated.

Regards

James

[local-looney]

dont know if it would make a difference,but did u disconnect battery before removing/unplugging etm?
might just be a case of clearing the code?

i darent do anything to mine unless the batterys off!!! lol

[shepbomb]

P0443 - evap valve

[M-R-P]

P0443 - evap valve

Isn't that the ptc nipple thingy between the pcv and maf to compressor hose?

I could be (probably) wrong...

[JamesT5]

This error has only happened since I finished fiddling around under the bonnet. Have I damaged something serious?

[Harvey]

dont know if it would make a difference,but did u disconnect battery before removing/unplugging etm?
might just be a case of clearing the code?

i darent do anything to mine unless the batterys off!!! lol

Did you disconnect battery before you started work ?
.

[merc85]

I thought the evap valve went to the charcoal canister??

on a 850 it lives nsf just by the head light, vac line goes to the canister in the nsf wing.

Not sure on a v70 tho

[M-R-P]

I dunno if the P2 even has a charcoal canister. I've not come across one during my forridgings...


EDIT

found it...

looks like this...

[JamesT5]

Did you disconnect battery before you started work ?
.

Yes I disconnected the battery for safety reasons. I didn't fancy a shock off that red live wire near the ETM.

The emissions warning light came on as well. I tried clearing the DTC, engine off, iginition off and then restarted only to get the error code back up again.

Regards

James

[M-R-P]

On top of your starter motor, check the connections for this...

[JamesT5]

On top of your starter motor, check the connections for this...

Thanks, I'll check during daylight hours first thing in the morning. Where abouts is my starter motor located, is that down the bottom slightly right of centre by any chance?

Regards

James

[M-R-P]

This pic was taken from above the nearside front wing.
The shiny silver thing across the very top of the pic is the side of the inlet manifold (cylinder head on the right).
Half way down the pic, on the left hand side is the U-bend in the air pipe, where it connects to the etm.
Directly to the right is the evap valve that you want to check the connections for. (the metal cylinder below it is the starter).
so yes, the right hand side, it's possible you knocked it while removing the air pipe or the etm.

[JamesT5]

This sensor came out of the plastic hose and I had to reinsert it. The wiring loom that runs from it does connect with the evaporator thingy, what ever it is that we're on about.

I wonder if I have this connected up back to front or something? (sorry about the blurred image but you can see what it is).

Attachment 13571

Regards

James

[M-R-P]

Hmm, yes, that would be a good place to start. Unplug everything and plug it all back in again. Something's probably got disturbed somewhere.

[JamesT5]

Ok, done a final test for the night and that was a quick test drive down the road. The engine emissions light has gone out but the DTC is still there and now I'm getting a 'surging' at idle, yes, similar to that of an ETM issue but my bet is it's related to the DTC.

I did unplug and plug back in both of those sensors to that air pipe (the one that runs to the ETM) but it's made no difference and the evap purge thingy looks ok.

Jury's out on this one but the car is perfectly driveable so I'll work on the problem tomorrow.

Regards

James

[JamesT5]

I could test the wires using the clamp meter tomorrow to see if there is any power going down them. At least then I can narrow it down a bit.

[M-R-P]

It's gonna be (99% sure) a wire or plug, somewhere been dislodged or upset somehow.

Keep us posted mate

You'll get there.

[Al115]

This sensor came out of the plastic hose and I had to reinsert it. The wiring loom that runs from it does connect with the evaporator thingy, what ever it is that we're on about.

I wonder if I have this connected up back to front or something? (sorry about the blurred image but you can see what it is).

Attachment 13571

Regards

James

That looks like an IAT (intake air temp) sensor to me?

Good luck with it.

[JamesT5]

I'm going to try and get some video footage done today of the misfiring and related stuff and put it up on Youtube or something. Then people can see the problem actually happening. I'll get some shots of the engine bay too.

I'll be using my HD camcorder so hopefully I can find a format suitable for uploading to the net.

Regards

James

[jardon]

Hi James, the sensor that you posted a picture of is an intake air temperature sensor. The clip that holds mine into the intake pipe broke off years ago so I cable tie it in. That won't have any bearing on the evap code. The evap valve is the thing Martin showed you a picture of - it takes vacuum from the inlet manifold via a pipe that you can see coming out of the manifold and down between the runners. If that is off or split you will get unmetered air and it will affect driveability (surging etc).

The evap valve opens under ECU control to suck fuel vapour out of the charcoal canistor underneath your rear passenger wheel arch. Leaks in evap systems can be due to split/popped-off pipes or the valve becoming electrically disconnected - that's where I'd be looking. It would be easy to stress that pipe work and cabling when pushing the intercooler-ETM pipe around.

I thought I had an evap leak recently when chasing down my idle issues so I have some webpages bookmarked. For background reading:

http://www.aa1car.com/library/evap_system.htm

If it's a circuit fault code then could be the electrical connector has popped off or the wiring has been damage during the ETM job. Is there a fuse for such things that may have blown?