LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volvo >> 2004 >> V40 Base >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control Module (ECM) Diagnostic Trouble Codes - 1 Of 3 >> ECM-1A: Rear Heated Oxygen Sensor (Ho2S) Signal. Signal Missing. Permanent Fault (B4204T2 CVVT; 2000) >> Signal missing. Permanent fault >> Verification >> Checking diagnostic trouble codes (DTCs)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Checking diagnostic trouble codes (DTCs)

Fig 1: Identifying Ignition ON
GLL101051Courtesy of VOLVO CARS OF NORTH AMERICA.

Has the diagnostic trouble code (DTC) status switched to intermittent?