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Engine light on when up to temp 900 1993

posted by  someone claiming to be petiboy on  Mon Jun 4 14:43 CST 2012 [RELATED]

Hi all,

This forum is fantastic and it has helped me fix many a problems throughout the years.

Got another one, my 1993 940T with 307k burst a heater line a few weeks ago and the car overheated badly and just died. Now it is running great but the engine light comes on once the car gets up to temp and didnt do this prior to the overheat.

Things I have done since overheat:
-new heater hoses
-new water pump
-new thermostat
-new RPM sensor (CPS)
-new resevior cap

Any suggestions ?








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    Engine light on when up to temp 900 1993

    posted by  spook on  Mon Jun 4 20:07 CST 2012
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 08:06 CST 2014
    [RELATED]

    Dear petiboy,

    Hope you're well. As porkface suggested, see what codes are associated with the check engine light. I'd guess the temp sensors - for the instrument cluster's gauge and/or the Engine Control Unit (ECU) should be replaced.

    If they're the factory-original items, they don't owe you a penny. Even if they've been replaced, they likely were "cooked" by the severe over-heating. These sensors are on the driver's side of the head (underneath the intake manifold runners).

    I hope the new heater hoses are Volvo brand. With rubber items, it is next-to-impossible to know how the rubber was compounded or processed. Those are critical determinants of working life.

    Volvo brand heater hoses last about a dozen years: more where ambient temps are low (far northern lands, e.g., Canada, Norway, etc.), less, where ambient temps are high (in the tropics).

    Hope this helps.

    Yours faithfully,

    Spook







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