Frequently Asked Questions

What is the most common reason for check engine light on a 1997 Toyota Supra?

• Most often it’s ignition misfires — worn spark plugs, failing coils, or fuel delivery issues are common culprits.
• Oxygen sensor or catalytic efficiency faults (reduced fuel economy, emissions alerts) also frequently trigger the light.
• On a twin‑turbo 3.0 inline Supra, turbo-related underboost or boost leaks can set codes and reduce performance.
• Nalley Toyota of Roswell uses OEM diagnostics to pinpoint the root cause and recommend the most cost-effective repair.
• Warranty-covered repairs must be performed at a certified dealership to preserve coverage and long-term savings.

What does it mean when the check engine light comes on in a 1997 Toyota Supra?

• It means the vehicle’s on-board computer has detected an issue and stored a diagnostic trouble code (DTC).
• Codes range from minor emissions sensor alerts to severe engine or turbocharger faults that require immediate attention.
• While some codes allow limited driving, others — especially flashing lights — indicate conditions that can cause rapid damage.
• Bring the Supra to Nalley Toyota of Roswell for a professional scan; our factory-trained techs interpret codes and advise a repair plan.
• Repairs covered under warranty must be completed at a certified dealership to ensure immediate and long-term savings.

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

• Quick checks: confirm fuel cap is secure, note unusual noises, smells, or performance loss before driving further.
• If the light is steady, schedule a diagnostic scan; if it’s flashing, stop driving and have the vehicle inspected immediately.
• Use Nalley Toyota of Roswell’s factory diagnostics to read codes, verify symptoms, and prevent further damage.
• Documenting observed symptoms and driving conditions helps technicians identify root causes faster and reduce repair time.
• Remember: warranty-covered repairs must be performed at a certified dealership to retain coverage and maximize savings.

How long does a check engine light service take?

• Diagnostics typically take 30–90 minutes depending on symptoms and required tests; complex issues may require additional inspection time.
• Minor repairs like sensor or ignition part replacement are often same-day at our service center.
• Major repairs (turbo, catalytic converter) require additional parts and appointment time; we provide clear timelines up front.
• Nalley Toyota of Roswell often completes work faster and for less than independent shops due to OEM parts access and efficient factory procedures.
• Any warranty-covered work must be done at a certified dealership to preserve coverage and deliver long-term cost savings.

How much does a check engine light diagnostic cost for a 1997 Toyota Supra?

• Diagnostic fees typically range from about $89–$150, varying by test depth and any follow-up inspections required.
• At Nalley Toyota of Roswell, diagnostic fees may be applied toward needed repairs, delivering immediate value.
• We often cost less than independent shops while offering higher service levels and factory-trained technicians, which yields long-term savings.
• Exact pricing depends on the issue uncovered; we provide transparent estimates before work begins.
• Warranty-covered diagnostics and repairs must be completed at a certified dealership to ensure coverage and protect your investment.