P0136Low urgency
O2 Sensor Circuit (Bank 1 Sensor 2)
Emission · Oxygen Sensors
✅ Safe to drive but catalyst monitoring is compromised. Fix within 2–3 weeks.
What this means
The downstream Bank 1 oxygen sensor circuit has a fault — the sensor output is outside the valid voltage range. The downstream sensor monitors catalyst efficiency.
Likely causes
- Failed downstream O2 sensorMost common
- Wiring or connector faultCommon
- Exhaust leak near sensorLess common
Estimated repair cost
Downstream O2 sensor$80 – $250
Wiring repair$80 – $200
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Frequently asked questions about P0136
What does P0136 mean?
The downstream Bank 1 oxygen sensor circuit has a fault — the sensor output is outside the valid voltage range. The downstream sensor monitors catalyst efficiency.
Is P0136 serious?
Safe to drive but catalyst monitoring is compromised. Fix within 2–3 weeks.
How much does it cost to fix P0136?
Repair costs for P0136 range from $80 – $250 depending on the root cause and your vehicle.
Can I drive with P0136?
Yes, the vehicle is safe to drive. Schedule a repair at your convenience.