What are the most common Hyundai Sonata problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2009 Hyundai Sonata has 4 documented issues. The most frequently reported are: P0174 — Bank 2 Lean from Upper Intake Plenum Gasket Leak (V6), P0171 — Bank 1 Lean from Intake Manifold Gasket Vacuum Leak / Stuck Purge Valve, P0011 — Intake Cam Over-Advanced from Failed Oil Control Valve (CVVT). None are rated critical, but regular maintenance is recommended.
Is the Hyundai Sonata reliable?
The 2009 Hyundai Sonata has 4 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Hyundai Sonata problems?
Repair costs for known Hyundai Sonata issues range from $90 to $2,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2005-2010 Hyundai Sonata P0174 — Bank 2 Lean from Upper Intake Plenum Gasket Leak (V6)?
P0174 (System Too Lean, Bank 2) only applies to the V6 Sonata, since the four-cylinder has a single bank. On the 2.7L Delta (2005) and 3.3L Lambda (2006-2010) V6, this code most often appears alongside P0171 and points to a shared, centrally located vacuum leak — most commonly a… Repairs typically run $250-$650. Severity: medium.
What is the 2006-2015 Hyundai Sonata P0171 — Bank 1 Lean from Intake Manifold Gasket Vacuum Leak / Stuck Purge Valve?
On the Hyundai Sonata, P0171 (System Too Lean, Bank 1) is most commonly triggered by unmetered air entering downstream of the MAF sensor. The two dominant Sonata-specific sources are a leaking intake manifold gasket and a canister purge valve that sticks open. Because the MAF nev… Repairs typically run $90-$550. Severity: medium.
What is the 2007-2019 Hyundai Sonata P0011 — Intake Cam Over-Advanced from Failed Oil Control Valve (CVVT)?
On the Sonata, P0011 (Intake Camshaft Timing Over-Advanced, Bank 1) is set when the CVVT phasing runs further advanced than commanded. The most common Sonata cause is a failed/clogged intake Oil Control Valve (OCV/VVT solenoid) — the CVVT system uses oil pressure metered by the O… Repairs typically run $120-$450. Severity: medium.
What is the 2006-2010 Hyundai Sonata P0430 — Bank 2 Catalytic Converter Efficiency Failure (V6)?
P0430 (Catalyst Efficiency Below Threshold, Bank 2) applies only to the V6 Sonata, which has two catalyst banks. On the 2006-2010 Sonata 3.3L Lambda V6 the bank 2 warm-up catalytic converter degrades so the downstream O2 sensor tracks the upstream sensor too closely, indicating t… Repairs typically run $500-$2,500. Severity: medium.
