Volvo 850 Lambda Light flashes and Engine hesitates

Discussion in 'Volvo 850' started by DR Gibson, May 8, 2009.

  1. DR Gibson

    DR Gibson Guest

    Dear Group,

    I have a Volvo 850 GLT Estate 2.5 20 valve, UK L registration c.1994. At
    times the dashboard Lambda Light flashes and the engine hesitates, sometimes
    just once, and at others many times in succession. This usually happens on
    a run once the engine has heated up and more at higher speeds, mainly on a
    very light throttle, much less with a heavy throttle, rarely under full
    deceleration and breaking.

    I have the Haynes workshop manual, and I checked the diagnostic module
    sockets and fault codes:

    Module A Socket 6:
    3 - 2 - 4 Camshaft position sensor absent intermittently.
    2 - 1 - 4 RPM (crankshaft) sensor signal absent intermittently


    Module A Socket 2 (Jetronic):
    1 - 3 - 1 Engine RPM signal from ignition system absent or faulty.

    Will replacing the Camshaft and or RPM sensors cure the problem, please, or
    do you think the fault lies elsewhere? I would like to do the work myself
    if it is not too daunting.

    God bless,

    David
     
    DR Gibson, May 8, 2009
    #1
  2. DR Gibson

    Tim.. Guest

    Yes, camshaft sensor is a fairly common failing.. check the connector and
    make sure it is not oil soaked too.
    tim
     
    Tim.., May 9, 2009
    #2
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