Gauge Problem vs. Sensor Problem:
One of the more frequent questions I get asked involves the oil pressure gauge and the gas gauge and whether or not I can fix those. If it's the gauge stepper motor acting up- Yes. If it's purely a sensor issue, then replacing the gauge motors isn't going to fix the problem. That becomes a No!!
What I do see a lot of is both bad gauges and bad sensors combined with one another. The bad sensor seems to help push the faulty stepper motor to it's breaking point.
The oil pressure sensor will often register a very high reading or an erratic reading when it goes bad. Depending on the parts provider they run about $50.00.
The fuel gauge float sensor for GM vehicles is located in the gas tank. Often times when this senor goes bad, people believe they had gas in the tank and run out. Sometimes the driver thinks they need gas only to find out there was gas in the tank.
If a gauge doesn't cycle to it's staring point when the ignition key is turned on that's an indication the gauge is bad. If the fuel gauge reads above E and the low fuel warning light comes on this is an indication the gauge stepper motor is acting up
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