Check Engine Light Flashing

When the check engine light is flashing in a 2025 Hyundai Sonata, it typically indicates an active misfire or a condition that could damage the catalytic converter if driven long-term. A flashing light is a higher-priority alert than a steady light: it often means the engine is running poorly, unburned fuel is entering the exhaust, or a sensor is detecting a severe fault. At Stevinson Hyundai in CO, we recommend stopping driving when safe and having our technicians inspect the vehicle as soon as possible to avoid escalated repairs. Our technicians use Hyundai-specific diagnostics and OEM procedures to identify misfire sources — spark, fuel, or compression related — and then provide transparent repair recommendations. We emphasize immediate and long-term savings: addressing a flashing condition promptly prevents catalytic converter damage and larger bills down the road. Check our service specials and schedule service online; service financing is available so you can get urgent repairs performed now and pay over time. Trust Stevinson Hyundais certified team to diagnose quickly, use genuine Hyundai parts, and document repairs to preserve warranty coverage and resale value.

2025 Hyundai Sonata Check Engine Light Codes

Common engine light codes on a 2025 Hyundai Sonata include P0420 (catalyst system efficiency), P0300 (random/multiple misfires), P0133 (oxygen sensor slow response), and P0171/P0174 (system too lean). Ignoring these codes can create escalating costs: for example, a persistent P0420 left untreated can require catalytic converter replacement, which is substantially more expensive than repairing the underlying fuel or oxygen sensor issue. A P0300 misfire can lead to poor fuel economy, engine damage, and potential catalytic failure; early detection and repair at Stevinson Hyundai often prevents those larger bills. Our Colorado dealership provides a clear diagnostic report, OEM part options, and an explanation of short- and long-term cost impacts for each code. Because warranty-covered repairs must be done at a certified dealership to maintain coverage, bringing your 2025 Hyundai Sonata to Stevinson Hyundai ensures any warranty claims are handled correctly. We also highlight how our service often costs less than independent shops once you factor in correct diagnosis, OEM parts longevity, and avoided repeat repairs. Book online to schedule service or view current discounts via service specials. Our technicians are factory-trained, our facility is equipped for fast turnarounds, and we focus on preserving vehicle reliability and resale value.

2025 Hyundai Sonata Check Engine Light Reset

Resetting the check engine light on a 2025 Hyundai Sonata can be done electronically, but a reset without proper diagnosis can hide recurring issues and risk warranty or safety concerns. At Stevinson Hyundai we emphasize transparent service: we always read and record trouble codes before any reset and explain what the code means and recommended repairs. A dealer-performed reset includes validation that the root cause was addressed, OEM parts were used where required, and any warranty conditions remain intact. This dealer-first approach reduces repeat visits, saves money over time, and protects your investment in the 2025 Hyundai Sonata. If a simple sensor replacement or software update is needed, our certified technicians will complete the work and validate the repair before resetting the system. You can schedule appointment online to have us inspect and reset the light, and check our service specials for current savings. We also offer service financing to help manage larger repairs while restoring your vehicle to safe, reliable operation.