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YOUR RESEARCHVDO gauge (oil pressure) oddity - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Suspected cause
From the above, you will then know if the fault is due to an open on that wire or the other.
VDO gauge (oil pressure) oddity - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'open' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'open' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Reconnect above wire' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Reconnect the above wire, and then remove the ground wire from the back of the gauge.
VDO gauge (oil pressure) oddity - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Run remove the sending wire
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Suggestion
While the car is running, remove the sending wire from the back of the gauge.
VDO gauge (oil pressure) oddity - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Today my oil pressure gauge started going bananas. It would read fine for a minute then it would go off the chart and stick there. Then it would bounce around, read fine for 5 seconds then max out again. Electronics is not my strong point. Has anyone experienced this type of thing? If you had to guess, would you say
sender
,
gauge
, or
imminent engine implosion/explosion
?
While the car is running, remove the sending wire from the back of the gauge. This will peg the gauge, on one end or the other.
Reconnect the above wire, and then remove the ground wire from the back of the gauge. This will peg the gauge, on one end or the other.
From the above, you will then know if the fault is due to an open on that wire or the other.
Thanks - DM
P.S. - Different strokes for different folks, but I thought that the VDO style that you selected was too "busy", and so I picked a different style for mine (below).
My guess would be bad ground but the other suggestion with both wires is the way to go, and possibly also checking the sender end of the signal wire, lots of vibration at that end.
Maybe you just have a loose connection, or as mentioned bad ground. So I would check the easy stuff first like connections all tight and good ground. Maybe give a visual for a damaged wire as maybe, the erratic behavior makes it seem more like an intermittent connection.
