UDS Services

UDS services are standardized commands identified by a Service ID (SID). Each service has a request and a positive response SID (request + 0x40).

Examples:

• 0x10 DiagnosticSessionControl
• 0x22 ReadDataByIdentifier
• 0x19 ReadDTCInformation

Services are grouped by purpose: session management, data transmission, DTC management, I/O control, routine control, and upload/download.

pyudskit provides:

• Beginner methods like encode() and decode()
• Service shortcuts like read_did() and read_dtcs()
• Full registries in pyudskit.registry for validation and lookup
• Offline service classes in pyudskit.services
• AI reasoning in pyudskit.ai

See also:

• API Reference → Services
• API Reference → AI Client
• API Reference → Transport
• API Reference → Async
• API Reference → CLI
• API Reference → OEM Profiles

Positive response SID

A positive response uses request SID + 0x40. For example, 0x22 → 0x62.