What Does P0174 Mean on Your 2024 Kia Carnival?
A P0174 code on your 2024 Kia Carnival means the ECM detected a lean air-fuel mixture on Bank 2. The 2024 Carnival uses a 3.5-liter V6 producing 290 hp. With two cylinder banks, P0174 targets Bank 2 specifically. Your 2024 Carnival is under full Kia warranty. Take it to the dealer.
Common Symptoms You May Notice
- Check engine light on
- Rough idle
- Hesitation during acceleration
- Reduced fuel economy
- Power loss
- Engine vibration
Most Likely Causes of P0174 on the 2024 Carnival
- Vacuum Leak on Bank 2 - Loose or improperly seated connections on the V6 intake system.
- MAF Sensor Contamination - Dirty sensor causing lean fueling.
- ECM Software Issue - Calibration updates may be available.
- O2 Sensor Defect - Factory-defective Bank 2 sensor.
How to Diagnose the Problem
- Scan codes - Confirm P0174.
- Check for TSBs - Ask dealer about service bulletins.
- Schedule dealer service - Recommended under warranty.
Repair Options and Cost Breakdown
- Warranty repair - $0.
- Vacuum hose repair - $10 to $40 out of warranty.
- MAF sensor replacement - $100 to $230, plus $50 to $100 labor.
- O2 sensor replacement - $100 to $260, plus $100 to $180 labor.
Can You Fix This Yourself?
Let the Kia dealer handle this under warranty. Your 2024 Carnival is fully covered, so there is no reason to attempt repairs yourself.
Prevention Tips
- Use factory air filter
- Follow Kia maintenance schedule
- Use quality fuel
- Keep dealer service current
- Do not ignore warning lights