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yep more codes where to start 850

posted by  greendread on  Tue Jan 19 04:50 CST 2010
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last visit: Tue Sep 2 08:56 CST 2014
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Hello All,

So a few weeks ago the check engine light and service light started flashing and the car died then and there while I was driving. After some attempts to get it running I made it home.

I rented a scanner from auto zone and it said I had a miss in cylinder 5, and a fault in the air injection system.

I did a tune up and replaced my air injection purge valve I think that's what its called on the rad shroud... and everything ran great as usual but the check engine light was still on.

Yesterday I went back to auto zone and they did the scan and it gave off different codes all together?

P0410: secondary air injection system fault
circuit relay defective or fuse open
check connector and wiring
air pump defective or hose blocked

P0141
Heated oxygen sensor- Bank 1 sensor 2(H02S12)
Open or short circuit
poor electrical connection
faulty H02S12 bank 1 sensor 2

where to start and not waste a ton of money?

Any ideas?

Thanks,
greendread








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    yep more codes where to start 850

    posted by  KlausC on  Tue Jan 19 15:08 CST 2010
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    last visit: Fri Oct 24 10:15 CST 2014
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    Fun, isn't it?

    The 141 does not sound good. The rear O2 sensor is not responding, so check the electrical connection and wires going to the sensor. If all looks good, then you will need a new rear O2 sensor - not cheap.

    The 410 is probably the relay or water in the pump that froze and will not allow the fan to turn. Relay is not cheap. Drilling a couple of 1/8" holes in the outside of the fan to let water out is cheap.
    Turn off the radio, leave the window rolled down and start the car with a cold engine. Listen to the fan, which is in front of the driver's wheel. If it makes noise, good, it is not the relay.

    Klaus
    --
    Proud owner of a 220S. If I had more room, I would have more Volvos.








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      yep more codes where to start 850

      posted by  greendread on  Wed Jan 20 04:16 CST 2010
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      last visit: Tue Sep 2 08:56 CST 2014
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      Hello Klaus,

      what fan are you referring to? I forgot to mention I introduced sea foam into the vac line to do some cleaning and as I'm sure you know it produces a ton of smoke... it was then that I noticed an exhaust leak at the cat- could this be part of my problem- the rear 02 sensor is just after where I have a leak.

      I'm going to check the wiring to start with then the vacuum lines and go from there.

      Another thing on the to do list- my odometer stopped working yesterday!

      I still love my Volvos though ;)

      cheers,
      greendread








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        yep more codes where to start 850

        posted by  KlausC on  Wed Jan 20 05:05 CST 2010
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        last visit: Fri Oct 24 10:15 CST 2014
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        The fan or blower I was refering to injects air into the exhaust when the engine is cold to help burn off excess fuel. Usually runs about 2 minutes after cold engine start. The blower take in air through a 1" tube from the air cleaner and is located under the battery tray.

        A crack in the CAT? Try welding it up, replacement is expensive. As for the error message for the rear O2 sensor, it says that there is no signal. The rear O2 sensor doesn't do much, just checks the efficiency of the CAT.

        Klaus
        --
        Proud owner of a 220S. If I had more room, I would have more Volvos.








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    yep more codes where to start 850

    posted by  jablackburn on  Tue Jan 19 05:07 CST 2010
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    last visit: Thu Jan 20 10:56 CST 2011
    [RELATED]

    Clear all the codes and see if they come back. Then check around for vacuum leaks, it sounds like most of your problems could actually be related to bad vacuum lines or EVAP system leaks rather than bad sensors.







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