Hyundai Sonata: Common Codes & Fixes

Real-world diagnostic data for the Hyundai Sonata. These are the codes techs see most often. Tap any code for the full vehicle-specific fix and the exact part.

20 codes have specific fixes for the Hyundai Sonata
P0010 The oil control valve (OCV) for the camshaft actuator system gets clogged by oil sludge, especially if oil changes were neglected. 2010-2020 · easy DIY · 30-45 min P0011 Oil control valve for the intake cam sticks from sludge buildup. 2011-2020 · Easy DIY · 0.5 hour P0013 The exhaust-side oil control valve on Hyundai Theta II engines clogs with carbon and sludge. 2011-2019 · moderate DIY · 45 min - 1 hour P0015 Camshaft timing over-retarded on Hyundai Theta II engines is almost always caused by a failed oil control valve or stretched timing chain. 2011-2020 · easy (OCV) / hard (chain) DIY · 45 min (OCV) / 4-6 hours (timing chain) P0016 Cam-crank timing correlation is off. 2011-2020 · Advanced DIY · 5-7 hours P0017 P0017 on the Theta II engine means the timing chain has stretched enough that the crank and cam sensors are out of sync. 2011-2019 · hard DIY · 5-7 hours P0115 Engine coolant temperature sensor circuit malfunction. 2010-2020 · Easy DIY · 20-30 min P0125 ECT does not reach closed-loop threshold fast enough. 2010-2020 · Moderate DIY · 45 min - 1 hour P0128 Thermostat sticks open around 60-80K miles. 2010-2020 · moderate DIY · 1 hour P0134 Upstream O2 sensor is inactive. 2010-2020 · Easy DIY · 30 min P0135 The upstream O2 sensor heater fails prematurely on Theta II engines due to excessive exhaust heat from oil burning issues. 2010-2020 · easy DIY · 30 min P0192 Hyundai GDI fuel rail pressure sensor low input can be caused by a faulty sensor or an actual low fuel pressure condition. 2011-2019 · easy DIY · 15-30 min P0204 Cylinder 4 injector circuit fault. 2010-2020 · Moderate DIY · 1 hour P0300 These Theta II engines have known connecting rod bearing failure and excessive oil consumption. 2012-2020 · easy DIY · 30 min P0441 The purge control solenoid valve (PCSV) is the most common cause on Hyundai Theta II engines. 2011-2019 · Easy DIY · 15-30 minutes P0456 The EVAP purge control solenoid valve (Hyundai 28910-3R100) sticks partially open, causing a small evaporative leak. 2010-2020 · easy DIY · 20 min P0496 Hyundai vehicles with P0496 have a stuck-open purge valve allowing EVAP flow when the PCM is not commanding purge. 2012-2020 · easy DIY · 20-30 min P1168 Hyundai P1168 indicates a closed-loop fuel control issue, usually traced to a contaminated MAF or a weak upstream O2 sensor. 2004-2010 · easy DIY · 30 min - 1 hour P2112 Broken return spring inside the throttle body. 2007-2016 · easy DIY · 30 min U1000 Hyundai uses U1000 similarly to Nissan as a general CAN fault code. 2011-2020 · easy DIY · 30 min - 1 hour

Frequently Asked Questions

What are the most common check engine light codes on a Hyundai Sonata?

The most commonly reported OBD-II codes for the Hyundai Sonata include P0010, P0011, P0013, P0015, P0016. Each code indicates a specific issue -- tap any code above for the full diagnostic breakdown.

How much does it cost to fix a check engine light on a Hyundai Sonata?

Repair costs vary by code. Many Hyundai Sonata fixes like gas cap replacement, sensor cleaning, or spark plug changes are under $50 in parts and can be done at home. More complex repairs like catalytic converter or transmission work can run $500-$2,000+ at a shop.

Can I drive my Hyundai Sonata with the check engine light on?

It depends on the code. A steady check engine light usually means you can drive short distances safely. A flashing check engine light means stop driving immediately -- continued driving can cause serious engine damage. Scan the code first to know what you are dealing with.

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