P0037Medium Priority
Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 1 Sensor 2
Category: Powertrain• Fuel and Air Metering
1 articles · 1 makes affected
What is P0037?
Heated Oxygen Sensor (HO2S) Heater Control Circuit Low (Bank 1 Sensor 2). Low voltage in the downstream O2 sensor heater circuit, affecting catalytic converter monitoring.
Symptoms You May Notice
- ●Check engine light
- ●Failed emissions test
- ●Poor fuel economy
How to Fix It
- ●Replace downstream O2 sensor ($100-$300, intermediate)
- ●Repair short circuit in wiring ($100-$300, intermediate)
Owner Statistics
Based on 450 real owner discussions • 25 confirmed solutions
$148
Average Repair Cost
6%
Success Rate
60%
DIY Repairs
450
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.