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1999 V70 AWD P0236, P0237, P1113 codes persist after TCV, MAF replacement

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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Year and Model: 1999 V70 AWD
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1999 V70 AWD P0236, P0237, P1113 codes persist after TCV, MAF replacement

Post by deardeergod » Mon Apr 30, 2018 11:09 am

Last weekend I tried to tackle a few engine codes my car had. I ordered a new HD TCV from ipd, and a Bosch MAF. I unplugged the battery and installed the parts. The battery would have been disconnected for at least an hour.

Fired her up and the check engine light came back immediately. Checked the codes and those three codes were there. The car drove and felt the same as before (which was fine). I realized the wiring for the TCV and MAF stem off the same part of the wiring harness. Is there an internal connector for this part of the harness, or should I start looking for chafed wires? Any thoughts as I move forward with this would be appreciated.

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Re: 1999 V70 AWD P0236, P0237, P1113 codes persist after TCV, MAF replacement

Post by scot850 » Mon Apr 30, 2018 1:05 pm

I'd check the wiring, in particular the TCV. When I had work done at the dealer, the wiring harness magically broke apparently, but in their defense, the wires to the TCV from the connector where tired and broke,

When fitting the IPD TCV, I always tell folks NOT to screw the front 'leg' all the way in. If you do it will push the small metal mesh cover in there backward and prevent the valve operating or make it inconsistent. IPD tick me off as I asked them to warn customers to this issue as I managed to damage the issue. When I figured out the issue, they at least sent me a replacement but never update the install info. Turn the front pipe no more than 3-4 turns inward. It will feel loose but they claim that is ok.

2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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