Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- EVAP canister purge valve harness circuit open or shorted - EVAP canister purge valve electrical connection - Faulty EVAP canister purge valve

When Detected

The P1001 code is triggered when the ECM has detected an open circuit or short to ground on the EVAP canister purge valve.

Description

The Engine Control Module (ECM) monitors the Evaporative Emission (EVAP) canister purge valve for open or short circuit.