What Does P0172 Mean on Your 2024 Hyundai Kona?
A P0172 code on your 2024 Hyundai Kona means the engine control module has detected that the engine is running too rich — too much fuel in the air-fuel mixture. The redesigned 2024 Kona uses a 2.0-liter Smartstream inline-4 engine producing 147 horsepower. As an inline-4 with a single cylinder bank, P0172 affects the entire engine. The ECM uses oxygen sensor feedback to adjust fuel delivery, and when it cannot correct the rich condition within normal limits, this code triggers.
Symptoms You Might Notice
- Check engine light illuminated
- Fuel economy dropping below the expected 32 mpg combined
- Black or dark exhaust smoke
- Rough idle or slight vibration
- Sluggish acceleration
- Fuel smell from the exhaust
Common Causes of P0172 on the 2024 Kona
Even on the all-new 2024 Kona, these issues can trigger P0172:
- Contaminated MAF Sensor — Road debris or manufacturing residue can contaminate the mass airflow sensor, causing incorrect readings and over-fueling.
- EVAP Purge Valve Issue — The canister purge valve can stick open on Hyundai vehicles, allowing excessive fuel vapors into the intake manifold.
- Defective Oxygen Sensor — A factory-defective or prematurely failing O2 sensor provides wrong data to the ECM, causing incorrect fuel adjustments.
- ECM Software Calibration — First-year production models may benefit from software updates that fine-tune fuel trim calibration.
How to Diagnose the Problem
- Visit your dealer — The 2024 Kona is under full warranty. Your dealer will diagnose at no charge and check for any TSBs or software updates.
- Scan for companion codes — EVAP codes alongside P0172 suggest a purge valve problem.
- Monitor fuel trims — Long-term fuel trim below -10% confirms the rich condition.
- Check MAF sensor readings — At idle, the 2.0L should read approximately 3-7 g/s.
- Verify O2 sensor function — Check for proper voltage switching between 0.1V and 0.9V.
Repair Options and Estimated Costs
- ECM software update — $0 under warranty
- MAF sensor cleaning or replacement — $10-$220 ($0 under warranty)
- EVAP purge valve replacement — $75-$190 ($0 under warranty)
- Oxygen sensor replacement — $140-$285 ($0 under warranty)
- Fuel injector service — $150-$390 ($0 under warranty)
All P0172-related repairs on your 2024 Kona are covered under Hyundai's factory warranty. There is no cost to you for diagnosis or repair.
Prevention Tips
- Follow Hyundai's maintenance schedule
- Don't overfill the gas tank
- Use quality fuel from Top Tier stations
- Report check engine lights to your dealer promptly
- Keep the air filter clean and inspect it regularly