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Actually it's not that it wouldn't know the correct timing, if you are talking about the cam angle sensor on the exhaust cam, then it will not send a pulse signal to the ECU at all, so no spark, no start. You can buy a new hall effect sensor from Jaycar Electronics for about $19 and put that in your original housing, otherwise multiply that amount by 20 for the Volvo product. There should be a crank sensor and a cam sensor, both of these have to work to get the car to spark. The cam angle sensor fails more because it is subjected to massive amounts of heat.


Yes it would. The engine would not know the correct timing.

There are several no start reasons. If you have a scanner tool it could isolate and reduce guessing. Your hall sensor, mass air flow sensor, ignition coil, could prevent the car from starting and run erratically at worst. Replace ignition coil first, mass air flow next. Try junk yard for the parts if your not sure. This could get expensive if at a repair shop!

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โˆ™ 2009-09-28 23:45:46
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Q: Would a faulty Cam Sensor on a 1993 Volvo 850 cause the car not to start?
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