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2007 xc70 code 443 already replace purge control valve

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2007 xc70 code 443 already replace purge control valve

Post by volvomadness » Tue Mar 12, 2019 2:04 pm

Getting a code 443 says purge control valve malfunction. I put in a brand new one from fcp still getting code.

Any thoughts?
Madness



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Re: 2007 xc70 code 443 already replace purge control valve

Post by RickHaleParker » Tue Mar 12, 2019 4:49 pm

P0443 = ECM-421B Canister purge (CP) valve. Signal missing


Diagnostic trouble code (DTC) information ECM-421B

Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that there is no signal from the evaporative emission system (EVAP) valve.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute value
twin heated oxygen sensor (HO2S) control disabled.

Possible source
  • 1. Damaged evaporative emission system (EVAP) valve
    2. Open-circuit in the signal cable
    3. Contact resistance in the terminals
    4. Open-circuit in the power cable.
Fault symptoms
Malfunction indicator lamp (MIL) lit.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.
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1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

volvomadness
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Re: 2007 xc70 code 443 already replace purge control valve

Post by volvomadness » Tue Mar 12, 2019 5:08 pm

Thank you for the reply. I put a brand new purge control valve in the car and still getting the code.l



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Re: 2007 xc70 code 443 already replace purge control valve

Post by RickHaleParker » Tue Mar 12, 2019 5:19 pm

volvomadness wrote:
Tue Mar 12, 2019 5:08 pm
Thank you for the reply. I put a brand new purge control valve in the car and still getting the code.l
Check the wiring, shorts/opens? Electrical Connector clean? Is it getting power? Ground good?


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

volvomadness
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Re: 2007 xc70 code 443 already replace purge control valve

Post by volvomadness » Wed Mar 13, 2019 7:05 pm

To test whether its getting power to the purge valve can I hook up a 12volt tester to the connection when the car is warm?



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Re: 2007 xc70 code 443 already replace purge control valve

Post by abscate » Wed Mar 13, 2019 8:22 pm

Disconnect the purge valve electrical and look for 12 V on one pin to ground with ignition on.


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Re: 2007 xc70 code 443 already replace purge control valve

Post by volvomadness » Fri Mar 15, 2019 5:49 pm

I am almost sure there is a short somewhere. The connection is under the intake does anyone know if I trace the wires are they accessible how are they snaked?

Thanks Madness



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Re: 2007 xc70 code 443 already replace purge control valve

Post by abscate » Sat Mar 16, 2019 8:18 am

You will spend hours fudging electrical stuff.

Look for 12 V at the purge valve , key on. The wires on Volvo disappear quick into well designed and insulated looms which rarely give trouble unless someone has messed with it.

Odds are 999/1000 it’s a simple missing 12 from a fuse , relay, or connector


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Re: 2007 xc70 code 443 already replace purge control valve

Post by volvomadness » Sun Mar 17, 2019 7:36 am

Looked at all four fuse areas not one specifies a fuse, relay for purge valve solenoid or am I missing something.

Thanks Madness



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Re: 2007 xc70 code 443 already replace purge control valve

Post by xHeart » Sun Mar 17, 2019 8:57 am

Here is a view of pertinent components. Item #6 is the SHUT OFF VALVE near canister -- rarely fails.
Image


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