What are the symptoms of P0031?

Symptoms of P0031 include: Check engine light, Extended warm-up time, Poor fuel economy, Rough idle when cold.

To fix P0031, you can try: Replace upstream O2 sensor ($100-$300, intermediate); Repair wiring short to ground ($100-$300, intermediate); Check and repair blown fuse ($5-$30, beginner). Based on 31540 owner reports.

How much does it cost to fix P0031?

The average repair cost for P0031 is $379 based on 31540 owner reports. Costs vary depending on the specific repair needed.

P0031Medium Priority

Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 1 Sensor 1

Category: Powertrain• Fuel and Air Metering

1 articles · 1 makes affected

What is P0031?

Heated Oxygen Sensor (HO2S) Heater Control Circuit Low (Bank 1 Sensor 1). Low voltage detected in the heater circuit of the upstream oxygen sensor, preventing proper sensor operation.

Symptoms You May Notice

●Check engine light
●Extended warm-up time
●Poor fuel economy
●Rough idle when cold

How to Fix It

●Replace upstream O2 sensor ($100-$300, intermediate)
●Repair wiring short to ground ($100-$300, intermediate)
●Check and repair blown fuse ($5-$30, beginner)

Owner Statistics

Based on 31,540 real owner discussions • 1069 confirmed solutions

Dataset (31,540 records)

$379

Average Repair Cost

Success Rate

31%

DIY Repairs

31,540

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 P0031.

Based on analysis of 3 owner reports where multiple codes appeared together.

Issues by Vehicle

LEXUS

2010 LS

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136 sources