Car gauges randomly fluctuating or dropping to zero
The tachometer and oil gauge will randomly fluctuate wildly or drop completely to zero while driving. These erratic readings do not match the actual engine RPMs and often happen right when you step on the gas.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1replaced the camshaft position sensorDid this help you?
- 2inspected the wiring harnessDid this help you?
- 3removed the connector from the ecm to check for discoloration and dialectric greaseDid this help you?
- 4Performing a manual oil pressure test with a mechanical gauge to verify true pressureDid this help you?
- 5Replacing the oil pressure sensor or sender unitDid this help you?
- 6Checking for a blocked or defective oil filterDid this help you?
- 7Replacing the stepper motor in the instrument clusterDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“since then the oil gauge will randomly start fluctuating a bunch. It doesn't do it all the time but sometimes it goes all the way to 0.”source ↗
“I have a problem where my car randomly just makes my tachometer go to zero or crazy while I’m driving, not relevant to the actual rpm’s, and it usually happens when I step on the gas.”source ↗
Where this came up
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