Fault Code P0139
Code meaning, symptoms, possible causes, part number, and estimated cost.
P0139
O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
Rear oxygen sensor responds too slowly — usually a worn sensor.
Part Details
Part Name
Downstream oxygen sensor
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪200 - ₪600
Engine Location
Exhaust pipe — after the converter
Symptoms
- Check Engine light
Possible Causes
- 1Outdated sensor
- 2Contaminated sensor
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