P0030Medium Priority
Heated Oxygen Sensor (H02S) Heater Control Circuit Bank 1 Sensor 1
Category: Powertrain• Fuel and Air Metering
5 articles · 3 makes affected
What is P0030?
Heated Oxygen Sensor (HO2S) Heater Control Circuit (Bank 1 Sensor 1). The heater circuit for the upstream oxygen sensor is malfunctioning. This prevents the O2 sensor from reaching operating temperature quickly.
Symptoms You May Notice
- ●Check engine light
- ●Poor fuel economy
- ●Failed emissions test
- ●Rough idle when cold
How to Fix It
- ●Replace upstream O2 sensor ($100-$300, intermediate)
- ●Repair wiring harness ($150-$400, intermediate)
- ●Replace O2 sensor fuse ($5-$20, beginner)
Owner Statistics
Based on 629 real owner discussions • 39 confirmed solutions
$1,230
Average Repair Cost
6%
Success Rate
0%
DIY Repairs
629
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.
Frequently Appears With
These codes often appear together in owner reports. Check these if you see P0030.
Based on analysis of 6 owner reports where multiple codes appeared together.