P23F4
Cylinder 3 Injector B Air-Fuel Ratio Imbalance
P23F4 is an OBD-II diagnostic trouble code meaning: Cylinder 3 Injector B Air-Fuel Ratio Imbalance. Common causes: contamination or wear of the cylinder 3 injector, problems with electrical wiring to the injector. Estimated repair cost: $28–89.
Symptoms
- Unstable engine operation at idle
- Increased fuel consumption
- Reduced engine power
- Dips during acceleration
- Check Engine Light Illuminates
Causes
- Contamination or wear of the cylinder 3 injector
- Problems with electrical wiring to the injector
- Malfunction of the injector driver in the ECU
- Low fuel pressure in the rail
- Dirty fuel filters
How to Fix
- Check the condition of the injector of cylinder 3
- Test the resistance and integrity of the injector wiring
- Check the fuel pressure in the system
- Clean or replace fuel filters
- If necessary, replace the faulty injector
Related codes
Error P23F4 by Vehicle Brand
FAQ
What does the P23F4 code mean?
P23F4 is an OBD-II diagnostic trouble code that indicates: Cylinder 3 Injector B Air-Fuel Ratio Imbalance
What causes a P23F4 error code?
The most common causes of P23F4 include: Contamination or wear of the cylinder 3 injector; Problems with electrical wiring to the injector; Malfunction of the injector driver in the ECU; Low fuel pressure in the rail.
How do I fix a P23F4 diagnostic trouble code?
To fix P23F4: Check the condition of the injector of cylinder 3. Test the resistance and integrity of the injector wiring. Check the fuel pressure in the system. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P23F4?
Yes, but get it checked soon
How much does it cost to fix P23F4?
The estimated repair cost for P23F4 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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