Thursday, August 16, 2012

"How To Diagnose The ‘Check Engine’ Light on 1992 Volvo 940 Turbo"

1992 Volvo 940 Turbo Wagon

I recently bought an 1992 Volvo 940 Turbo 940 wagon. It needs a lot of work, but I am prepared to spend some money and lots of time on this car. After a few days I’ve discovered some problems- The oil pressure light flickers occasionally at low speed idle. I believe the oil pump is suspect, and plan to change this unless someone has had this problem and had a different remedy. My second problem is that the check engine light is on. Occasionally the light goes out when I pull on the e-brake handle, then comes back on when releasing it (I think there maybe a glitch in the dash / electrical causing that). Is there a way to read the codes without a diagnostic scan tool? Third, after unlocking the driver’s door and opening it, the power lock system makes a lock unlock lock unlock type sound- I think it’s coming from the rear hatch? Could this be a door wiring harness problem? Fourth, the rear hatch wiper occasionally doesn’t ‘park’ flat like it should. Any suggestions?

Answer: As per “just b” socket #2 fuel injection and #6 ignition. Also it would be worth screwing a mechanical pressure gauge of KNOWN GOOD QUALITY into the oil pressure switch port [the switch itself may be bad] test don’t guess.

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