Question about 1994 Volvo 960
My 1998 Volvo S90 (70K) had P0715 and P0705 codes 2 months ago. I was told that the gear position sensor (PNP switch) has to be replaced. I replaced it a week ago. However, after replacement the gear cannot be engaged. I can put the shift to D position for driving a just one minute, but then the gear became disengaged. I have to stop engine for several minutes and then I can drive for another one minute. Today I used ODB II code scanner and got 3 codes P0715, P0740, P0705. After erased the codes, the Check Engine light got off but the problem was still there (can only engage the gear for a minute). However, when I used the scanner to scan the codes, I could not get any codes. Can somebody help me to figure out what was wrong with my car? Why I could not get the error codes (the Check Engine light was off too)? Thanks.
Sounds like the PNP switch or the Park/Neutral switch is out of line (adjustment). There is very much information about this on the internet.
Just today I was called by my garage because the mechanic could not start the car. I had my 1993 960 in for freon (134). Over the phone he said the starter would engage but no start. He was about to recommend a new fuel pump because no fuel was reaching the engine. So I said wait. I went down and while he was not looking I did the shifting routine of: brake depressed, key on, move shifter from Park through all the gears several time, then key off. After this I could start the engine and drive off. On the transmission is a PNP inhibitor switch and a Park/ Neutral sensor switch that cause no start and no shift situations. Oh yes, I did not bother to tell him what I did! He spent six hours trouble-shooting and would have charged me.
My next project is to wire around these trouble makers. I always drive in "E" and I do not care if it will start in all positions.
Posted on Jun 17, 2011
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