Source-backed diagnostic reference

P0645 EV diagnostic code

A/C Clutch Relay Control Circuit

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

Reference definitions

GENERIC: A/C Clutch Relay Control Circuit Source
GENERIC: A and C Clutch Relay Control Circuit Source

Search and canonical URL

Capitalization, underscores, hyphens, colons and spaces are normalized to this canonical code identity so alternate scan-tool formats do not create duplicate pages.