Frequently Asked Questions

What is the most common reason for check engine light on a 2026 Toyota GR Supra?

• Common causes include misfires, oxygen sensor faults, catalytic converter efficiency (P0420), and intake/boost leaks on turbo systems. These can trigger emissions or performance-related codes.
• Left unaddressed, these issues reduce fuel economy, increase emissions, and can damage the catalytic converter or turbocharger—turning a modest repair into a costly engine or exhaust job.
• Toyota of Greenville’s factory-trained technicians diagnose with OEM tools and often deliver lower overall costs than independent shops through accurate fixes and genuine parts.
• Warranty-covered repairs must be performed at a certified dealership to retain coverage and ensure correct parts and procedures.

How much does a check engine light diagnostic cost for a 2026 Toyota GR Supra?

• Diagnostics typically range from an inspection and code read to a full drive-cycle analysis; most dealership diagnostics fall in a reasonable range and are transparent up front.
• Toyota of Greenville often costs less than independent shops once you factor immediate and long-term savings from accurate diagnosis, OEM parts, and avoiding repeat repairs.
• If repairs are covered by warranty, they must be completed at a certified dealership—this protects your coverage and prevents denied claims from non-certified work.
• We provide written estimates, prioritize efficiency, and apply factory knowledge to reduce total ownership cost over time.

What does it mean when the check engine light comes on in a 2026 Toyota GR Supra?

• A steady check engine light indicates the vehicle’s onboard computer has detected an emissions or engine performance fault and logged a diagnostic trouble code (DTC).
• Codes range from simple sensor alerts to more serious issues; a prompt diagnostic prevents escalation and preserves fuel economy and emissions compliance.
• Toyota of Greenville uses OEM scanners and factory procedures to identify root causes, often saving customers money by avoiding unnecessary part swaps used by some independent shops.
• Any warranty-related work must be performed at a certified dealership to maintain coverage and ensure proper repairs.

What is the first thing to check when the check engine light comes on?

• Start with a simple inspection: ensure the gas cap is secure and undamaged—loose caps are a common cause of an emissions code.
• Next, have the vehicle scanned for stored trouble codes to guide the correct repair rather than guessing parts or procedures.
• Toyota of Greenville can perform the scan quickly and advise whether immediate service is needed; our factory-trained technicians follow Toyota procedures to protect long-term reliability and warranty coverage.
• If the vehicle is showing performance loss or a flashing light, avoid driving and contact our service center for prompt evaluation.

How long does a check engine light service take?

• An initial scan and courtesy inspection can take 30–60 minutes; minor repairs such as replacing a gas cap or sensor are often same-day jobs.
• Complex repairs—like catalytic converter, turbo, or engine work—can take longer depending on part availability and diagnostic depth.
• Toyota of Greenville schedules efficiently, uses OEM parts, and applies factory diagnostics so many issues are resolved faster and more cost-effectively than repetitive independent attempts.
• Remember: warranty-covered repairs must be performed at a certified dealership to preserve coverage; we’ll clearly explain timelines and expected costs before any work begins.