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OBD2 PID Library

Platform-specific PID reference for FORScan, HP Tuners, EFI Live, and OBD2 scanners. Every PID includes normal ranges, red flags, and why it matters for diagnostics. No account required.

Normal operating ranges Red flag values Tool compatibility Why each PID matters

Supported Platforms

6 platforms

What is a PID?

A PID (Parameter ID) is a specific data channel your vehicle's ECU broadcasts over the OBD2 port. Your scan tool requests PIDs and the ECU responds with live values — fuel pressure, knock counts, fuel trims, boost pressure, transmission temperature, and hundreds more depending on the platform.

Not all PIDs are available on all tools. FORScan exposes Ford-specific enhanced PIDs. HP Tuners and EFI Live expose GM-specific channels not available on generic OBD2 scanners. This library tells you which tool you need for each PID and what values to expect.

GREASE-AI

Know the PIDs. Now analyze the data.

Upload your datalog and GREASE-AI will automatically identify which PIDs are out of range, correlate anomalies across channels, and give you a root-cause diagnosis — not just a list of codes.