P23F3 — Cylinder 2 Injector B Air-Fuel Ratio Imbalance

What Does P23F3 Mean?

P23F3 is a diagnostic trouble code indicating: Cylinder 2 Injector B Air-Fuel Ratio Imbalance. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P23F3

⚠️ Check Engine Light (MIL) illuminated
⚠️ Cylinder 2 Injector B Air-Fuel Ratio Imbalance not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ Reduced engine performance

Common Causes

🔍 Faulty Cylinder 2 Injector B Air-Fuel Ratio Imbalance
🔍 Wiring or connector issue in Cylinder 2 Injector B Air-Fuel Ratio Imbalance circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does P23F3 mean?

P23F3 indicates: Cylinder 2 Injector B Air-Fuel Ratio Imbalance. The vehicle's computer has detected that the Cylinder 2 Injector B Air-Fuel Ratio Imbalance is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P23F3?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P23F3 for extended periods may cause additional problems.

How much does it cost to fix P23F3?

Repair costs for P23F3 typically range from $80 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 Cylinder 2 Injector B Air-Fuel Ratio Imbalance and related wiring
🔧 Replace faulty Cylinder 2 Injector B Air-Fuel Ratio Imbalance

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.

P23F3: Cylinder 2 Injector B Air-Fuel Ratio Imbalance