The trace
Level that leaps without a swipe, or sits still through a large fill.
Tank sensors
A jumping sensor cannot prove a fill.
Tank level is the third file. When it tracks the gallons, it is the best check you have. When it jumps, it cannot clear a driver and it cannot convict one.
Unit 4491, as an example
On the sample report, the tank sensor on unit 4491 jumped around. The instruction on that line is simple: do not treat those fills as clean, and do not treat them as theft, until the sensor can be trusted.
That unit still appears, so the shop can fix the sender. It does not appear as a stolen-gallon total.
What I use instead
GPS and the card still tell you whether the truck was at the pump. They cannot tell you the fuel went into that tank if the sensor is noise. The fill stays unverifiable.
A fleet that ignores bad sensors will either accuse people on bad data or mark everything clean. Both are expensive.
What I look for
How a sensor gets benched
The label
Unverifiable. Not theft. Not clean.
The fix
A unit number for the shop. I do not open a work order in your system.
Short answers
Before you book.
No. The audit runs on the card and GPS without them. Sensors help only when they behave.
Your shop. I name the unit. I do not write into the maintenance system.
Next step
Let's bench the sensors that lie.
If you have been using tank level as a verdict, this is the page to start from.