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S80 2001 ECM Faults

Help, Advice, Owners' Discussion and DIY Tutorials on the Volvo S80 model. Sometimes called an "executive car", the S80 was and continues to be Volvo's top-of-the-line passenger car.
Arnexas
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Joined: Thu Nov 28, 2019 12:44 pm
Year and Model: 2001
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S80 2001 ECM Faults

Post by Arnexas » Thu Dec 19, 2019 7:02 am

My 2001 s80 started throwing ecm-5200 (ignition switch signal wire short circuit or open circuit) and ecm-2110 errors after timing belt replacement. Faults came up at the same time. Car is struggling to start but runs well after starting. Oxygen sensor 1 is reading 0.5v and wont flactuate. Oxygen sensor 2 is flactuating between 0.03-0.1v. Now the intresting part - if I clear the codes with VIDA and disconnect battery for like 30 minutes, the faults are gone. Oxygen sensor 1 starts working and car starts without struggling. After few hours or days - faults come back. What can be the problem?

Arnexas
Posts: 9
Joined: Thu Nov 28, 2019 12:44 pm
Year and Model: 2001
Location: World
Has thanked: 0
Been thanked: 0
United States of America
Arnexas

Re: S80 2001 ECM Faults

Post by Arnexas » Mon Dec 23, 2019 9:34 am

ECM-5200 and ECM-2110 fixed, ECM was not properly inserted into its slot.

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