Intermittent fault, possibly crank sensor

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Intermittent fault, possibly crank sensor

700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars

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Aug 10th, 2013, 17:02	#1
Forrest VOC Member Last Online: Today 17:30 Join Date: Feb 2008 Location: Gloucester	Intermittent fault, possibly crank sensor 1994 940 Auto with 200FT engine. Always starts easily, runs well, but every once in a while and several times in forty miles yesterday the rev counter suddenly drops to 0, the engine loses power but doesn't stall, and the lambda light comes on. After a few seconds everything returns to normal and the lambda light goes out again. The fault has never lasted long enough for me to have to pull over but it can be quite unnerving. I have never had to restart the engine. I tried to read the fault codes today, but just got 1-1-1 on both positions 2 and 6 on the diagnostic unit. My next step would be to clean the crank sensor and check the cabling to it, BUT having taken an hour just to achieve a brief glimpse of this sensor and being unable to touch it let alone get a spanner to it I'm stuck. Is this likely to be the cause? How on earth do you get to it?

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