MODE 01 · PID 2F

Fuel tank level input

This percentage is the reported fuel-level input. It does not specify usable tank capacity or directly predict remaining driving range.

Formula
A × 100 / 255
Data bytes
1
Units
%

A worked decoding example

Request: 01 2F

Response: 41 2F 80

Data: 80 → 50.196078 %

The example shows service, PID and data only. It omits adapter headers, CAN identifier, length and padding. It is not a live vehicle reading.

Reading context

Slope, slosh and signal filtering affect a reading. Do not convert it to litres without the vehicle’s capacity and measurement assumptions.

A decoded value is a measurement, not a diagnosis. Encoding limits are not normal operating limits. Confirm vehicle support and the manufacturer’s procedure.

Byte decoder

Your input stays in this browser.MODE 01

FormulaA × 100 / 255 → %

A decoded value is a measurement, not a diagnosis. Encoding limits are not normal operating limits. Confirm vehicle support and the manufacturer’s procedure.

Sources

  1. python-OBD: Mode 01 command table ↗
  2. python-OBD: byte decoding implementation ↗
  3. CSS Electronics: OBD-II PID and response frames ↗
  4. California BAR: OBD test reference ↗

Independent reference; no affiliation with SAE, vehicle manufacturers or regulators. Sources checked 28 October 2026.