oil pressure light flashing (no buzzer)...and yes, i've read all the archives

mtcolombo 20 years ago

hello there!

need some help diagnosising a problem with my recent purchase.

my oil light flashes as soon as i start driving. no buzzer. it occurs at all speeds/RPMs. engine runs fine, and i'm convinced that it is something minor. see below for van details.

1991 Vanagon Westfalia Syncro
2.1 liter
10k miles on rebuilt BOTH oil sensors replaced no leaks or noises

my thought was that it was a sticky/dirty pressure relief valve/check ball issue. i was unsure as to if an electrical problem/wire issue would cause the light to flash.

any other thoughts?

thanks in advance! melissa

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Woodchuck 20 years ago

Have a oil pressure check done. Just because the engine was rebuilt... that doesn't mean there isn't a problem.

Back to basics, oil pressure check first on hot engine. I think from memory it should be 2bar @ 2000rpm, but check the repair manual.

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mtcolombo 20 years ago

the pressure has been tested and it is fine. apparently, the light has been flashing for a year and nobody can figure out how to fix it.

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CanadianCray 20 years ago

Than it has to be an electrical issue. If both sensors are new & you have good pressure there is nothing else left. You have more than likely a wire that is shorting to ground. Its easy to check. Check the resistance in the wires for the oil pressure sensor at both ends. Then if that's ok check the resistance to ground & also check the resistance in between the two wires to make sure they aren't sorted together. It HAS to be electrical be it in the wiring or the cluster itself.

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