Code Definition

P1933 (68) — Fuel Level Signal Plausibility Fault

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Ford

About P1933

P1933 is a manufacturer-specific powertrain diagnostic trouble code recorded for Ford vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1933 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

DTC P1933 is a Ford specific code indicating a fuel level signal plausibility fault. The Powertrain Control Module receives the fuel level signal from the fuel level sender, usually relayed through the instrument cluster or Body Control Module over the network, and uses it for evaporative system strategy and fuel calculations. The code sets when the reported fuel level is implausible, for example changing too suddenly, failing to change with fuel use over time, or sitting outside the calibrated range. A subcode such as :68 denotes the signal validity nature of the fault rather than a simple op...

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