Hyundai Trouble Codes and Known Issues

Hyundai has grown fast with the Accent, Elantra, Tucson and Santa Fe. Its Gamma, Nu and Theta gasoline engines almost all use dual variable valve timing (CVVT), and codes for that system are among the most searched for the brand.

Most searched models: Elantra, Accent, Tucson, Santa Fe, Sonata, Kona, Creta, Grand i10 and H-1.

Common problems on Hyundai vehicles

• CVVT oil control valves, which are sensitive to dirty oil or oil of the wrong viscosity.
• Theta II engines (2011 to 2019 Sonata, Santa Fe and Tucson 2.4): connecting rod bearing wear, covered by manufacturer campaigns and extended warranties in several markets.
• Camshaft and crankshaft sensors on the Accent.
• Canister purge valve.

Tips for diagnosing a Hyundai

• If your Hyundai has a Theta II engine and you hear knocking or get a misfire, ask the dealer whether your VIN has an open campaign or extended warranty.
• Change the oil on the severe-service schedule if you mostly drive in town: the CVVT system will thank you.

Do you have several codes at once? Use the free multi-code diagnosis for Hyundai: it sorts the codes by priority and shows these make-specific notes. Below are the codes with documented quirks on Hyundai vehicles.

Make notes are a guide based on well-known common failures. Always confirm with the manufacturer's documentation for your engine and model year.