LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Subaru
>>
2004
>>
Baja Base, Standard
>>
Repair and Diagnosis (Single Page)
>>
Engine Performance
>>
System
>>
Engine (Diagnostics) (H4SO U5 (PZEV))
>>
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
>>
DTC P0134: O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
>>
Diagnostic Procedure
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Diagnostic Procedure
Fig 1: DTC P0134 - O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1) - Chart
Courtesy of SUBARU OF AMERICA, INC.