P0136Medium Priority
O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
Category: Powertrain• Fuel and Air Metering
3 articles · 2 makes affected
What is P0136?
Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2). Problem with the downstream O2 sensor (after catalytic converter), affecting catalyst monitoring.
Symptoms You May Notice
- ●Check engine light
- ●Failed emissions test
- ●Slight decrease in fuel economy
How to Fix It
- ●Replace downstream O2 sensor ($100-$300, intermediate)
- ●Check wiring and connectors ($50-$200, beginner)
- ●Repair exhaust leak ($150-$500, intermediate)
Owner Statistics
Based on 42,102 real owner discussions • 984 confirmed solutions
$1,869
Average Repair Cost
2%
Success Rate
17%
DIY Repairs
42,102
Data Sources
About This Data
Statistics are aggregated from real owner discussions on Reddit, automotive forums, and YouTube comments. All data is anonymized and represents actual repair experiences reported by vehicle owners.