How to fix P0139 Code: O2 Sensor Circuit Slow Response (Bank 1, Sensor 2)
Possible Causes of a P0139 Code
Faulty O2 Sensor Bank-1 Sensor-2
Wiring - Open Short - Blown Fuse
Exhaust Leak
How To Test Oxygen Sensor Heater Element Video:
[ Ссылка ]
How To Test Upstream Oxygen Sensor 1 Video: [ Ссылка ]
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