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P2111 After O2 Sensor Replacement

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
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2003 - 2007 S60 R

ChrisRicc
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Re: P2111 After O2 Sensor Replacement

Post by ChrisRicc »

follow-up to my follow-up:

The butterfly valve appears ever-so-slightly open. Is this supposed to close down completely?
XC70Rider
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Re: P2111 After O2 Sensor Replacement

Post by XC70Rider »

ChrisRicc wrote: Sun Apr 07, 2019 4:21 pm follow-up to my follow-up:

The butterfly valve appears ever-so-slightly open. Is this supposed to close down completely?
It stays slightly open for air while idling. There is no idle air control valve on theses 2.5L engines.

Had the same question myself when I first dropped the ETM. I installed a new Bosch ETM last December and the valve on that unit is nearly the same as the defective unit.
EngineeringBloke
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Re: P2111 After O2 Sensor Replacement

Post by EngineeringBloke »

There is more than enough gunk in there to account for the throttle plate to jam or stick.

I am certain that you could clean it and I would expect the throttle body to work fine after that.

Perhaps, after the O2 replacements, the system saw the oxygen level more accurately and had a greater need to close the throttle - hence the plate closing on the junk.

I also installed a new ETM (non-Volvo, non-Bosch) and found it and the original had a spring that pushed the plate to almost closed, and another spring that opened the plate from fully closed to the slightly open position. I also concluded this was the idle air feature.

I was trying to understand why my ETM only closed to 10% tracked via my Torque app. However, the new one has the same behavior.
ChrisRicc
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Re: P2111 After O2 Sensor Replacement

Post by ChrisRicc »

Thanks, XC70Rider and EngineeringBloke. Both posts have been very helpful. I did go ahead and clean the unit in the pic. I haven't reinstalled yet, but it came pretty clean... amazingly. I'll pop a new gasket on there and hook her back up this week. I'll follow up with hopefully an all is well post. I can't remember if I heard it here, but removing the cooling fan helped immensely accessing the ETM. Incidentally, I did wonder if the replacement of the O2 sensors did require different activity from the ETM that it couldn't accommodate in its mucked up condition, which then threw the code that shut down the car. I just don't have the experiential intellectual archive to say definitively on my own.

Curious - in removing the wiring from the ETM, the connector shattered in my hand. Is there a fix for this, or am I forced to rig an alternative?
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RickHaleParker
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Re: P2111 After O2 Sensor Replacement

Post by RickHaleParker »

ChrisRicc wrote: Sun Apr 07, 2019 9:41 pm Curious - in removing the wiring from the ETM, the connector shattered in my hand. Is there a fix for this, or am I forced to rig an alternative?
That may of been all or part of the problem all along. See my post on page one. Follow the link below.
No time wasted, cleaning the ETM is not a waste of time.

Repair Harness for Volvo Electronic Throttle Body
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
ChrisRicc
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Re: P2111 After O2 Sensor Replacement

Post by ChrisRicc »

Thanks, RHP for the info. Is this as scary a repair as it sounds in the description? I've never spent any repair time with the ECM before.
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RickHaleParker
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Re: P2111 After O2 Sensor Replacement

Post by RickHaleParker »

I cannot answer that because the description does not sound scary to me.

If the rest of the harness is in good shape you have an alternative.
Get a set of Pin extraction tools, go to a PnP extract the pins from a connector, then install the plastic connector on your old harness.

If you go to a shop that specializes in Automotive electronics, there is a good chance you can buy a new plastic connector or hire them to install one. The bill should not be much.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
ChrisRicc
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Re: P2111 After O2 Sensor Replacement

Post by ChrisRicc »

I may give the new harness you recommended above a try. Thanks, again.
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Re: P2111 After O2 Sensor Replacement

Post by XC70Rider »

After breaking that same connector I installed a new 31409380 Harness myself. I didn't splice the wires but replaced them all leading back to the ECM. I got this aftermarket ECM extractor tool for less than $12 and it worked fine.

https://www.ebay.com/itm/Pro-ECU-comput ... 2749.l2649
ChrisRicc
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Re: P2111 After O2 Sensor Replacement

Post by ChrisRicc »

I think there's one included in the harness kit RickHaleParker referenced in the post above for $40 total. XC70Rider, was the install of the new harness at the ECM a relatively straight forward task?
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