LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 1998 >> Eldorado Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P1441 - EVAP System Flow During Non-Purge >> Diagnostic Procedures
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedures

  1. Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK , then go to next step.
  2. Using scan tool, check if DTC P1645 is stored as history DTC. If DTC P1645 is set, diagnose DTC P1645 first. If DTC P1645 is not set, go to next step.
  3. Disconnect EVAP purge line from EVAP purge solenoid valve. Install a vacuum gauge to solenoid purge port. Start and operate engine at idle. After 30 seconds, command EVAP purge solenoid valve on and off using a scan tool. If vacuum gauge indicates a vacuum reading, go to next step. If vacuum gauge does not indicate a vacuum reading, fault is present. See DIAGNOSTIC AIDS.
  4. Check EVAP purge solenoid valve for charcoal contamination. Replace as necessary.
scientia non olet · About LEMON Manuals