P01F2 — O2 Sensor Circuit Low Voltage Bank 1 Sensor 4

What Does P01F2 Mean?

P01F2 is a diagnostic trouble code indicating: O2 Sensor Circuit Low Voltage Bank 1 Sensor 4. This code relates to the fuel and air metering system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P01F2

⚠️ Check Engine Light (MIL) illuminated
⚠️ O2 Sensor reading at zero or minimum value
⚠️ Related system not functioning or in fail-safe mode
⚠️ Poor fuel economy

Common Causes

🔍 Open or broken wire in O2 Sensor circuit
🔍 Poor ground connection at O2 Sensor
🔍 Faulty O2 Sensor with no output signal
🔍 Disconnected or loose O2 Sensor connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P01F2 mean?

P01F2 indicates: O2 Sensor Circuit Low Voltage Bank 1 Sensor 4. The vehicle's computer has detected that the O2 Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P01F2?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P01F2 for extended periods may cause additional problems.

How much does it cost to fix P01F2?

Repair costs for P01F2 typically range from $20 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Repair broken wire or restore ground in O2 Sensor circuit
🔧 Clean and secure O2 Sensor connector and ground points
🔧 Replace failed O2 Sensor

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P01F2: O2 Sensor Circuit Low Voltage Bank 1 Sensor 4