Question about Volvo 850
Can you borrow an ignition coil and/or control unit for a day or two to check for the misfires?
The "Secondary Air System" should not be the problem since it merely is some air that gets blown into the exhaust line to increase start-up speed of catalytic cleaning. P0410 indicates a malfunction of this additional air system. This might be caused by the non-return valve in the air flow, the lambda sensor, or the air pump (which the turbo does not have, as far as I know). The valve is not too easy to get to but is quite often the source of the problem.
Posted on Mar 07, 2017
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Posted on Jan 02, 2017
the p0171 code is for a fuel system lean code......possible causes are a cracked exhaust manifold.....bad o2 sensor...bad coolant temp sensor fuel pump.....lean fuel can cause the other codes you have for misfires
Posted on Sep 30, 2008
i would check fuel supply, volume adn pressure, i wold also look at the MAF sensor hot wire to see if it has a little chia pet growing on it.
Posted on Dec 13, 2008
Posted on Feb 22, 2010
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