FixVault
Home
›
Infiniti
›
2004
›
M45
›
Repair and Diagnosis
›
Engine Performance
›
Engine Control System
›
DTC P0139, P0159: Ho2S2
›
Diagnostic Procedure
›
6. Check Heated Oxygen Sensor 2
6. Check Heated Oxygen Sensor 2
Check the following.
Harness connectors E315, F5
harness for open or short between HO2S2 and ground
: Repair open circuit or short to ground or short to power in harness or connectors.