P2AF1 — Intake Air O2 Sensor Negative Current Control Circuit High Bank 2

What Does P2AF1 Mean?

P2AF1 is a diagnostic trouble code indicating: Intake Air O2 Sensor Negative Current Control Circuit High Bank 2. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P2AF1

⚠️ Check Engine Light (MIL) illuminated
⚠️ Intake Air O2 Sensor Negative Current reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ System warning light illuminated

Common Causes

🔍 Short to voltage in Intake Air O2 Sensor Negative Current wiring harness
🔍 Corroded or water-damaged Intake Air O2 Sensor Negative Current connector
🔍 Faulty Intake Air O2 Sensor Negative Current outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does P2AF1 mean?

P2AF1 indicates: Intake Air O2 Sensor Negative Current Control Circuit High Bank 2. The vehicle's computer has detected that the Intake Air O2 Sensor Negative Current is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P2AF1?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P2AF1 for extended periods may cause additional problems.

How much does it cost to fix P2AF1?

Repair costs for P2AF1 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

🔧 Inspect and repair Intake Air O2 Sensor Negative Current wiring for short to voltage
🔧 Clean or replace corroded Intake Air O2 Sensor Negative Current connector
🔧 Replace faulty Intake Air O2 Sensor Negative Current

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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.

P2AF1: Intake Air O2 Sensor Negative Current Control Circuit High Bank 2