MODE 01 · PID 0D

Vehicle speed

This generic PID reports integer kilometres per hour. Convert units before comparing it with an app displaying miles per hour.

Formula
A
Data bytes
1
Units
km/h

A worked decoding example

Request: 01 0D

Response: 41 0D 64

Data: 64 → 100 km/h

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

Different update rates and the vehicle’s speed calculation can produce differences from GPS. A single discrepancy does not identify a wheel sensor.

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 → km/h

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.