Frequently Asked Questions

What is the most common reason for check engine light on a 2002 Toyota Celica?

• Common causes include misfires, oxygen sensor faults, catalytic converter issues, and EVAP leaks.
• Misfires often stem from worn spark plugs, ignition coils, or fuel delivery problems.
• Left unfixed, these issues raise fuel costs, reduce performance, and can damage the catalytic converter.
• Nalley Toyota of Roswell diagnoses the root cause with OEM-grade tools and factory-trained technicians.
• We frequently cost less than independent shops by avoiding repeat repairs and preserving long-term value under warranty.

How long does a check engine light service take?

• Initial diagnostic scan is typically 30–60 minutes to read codes and inspect related components.
• Simple repairs (sensor or hose replacement) may be completed the same day; complex repairs vary by part availability.
• Our service team provides accurate time estimates and prioritizes warranty-covered work at certified facilities.
• Choosing Nalley Toyota of Roswell often yields immediate and long-term savings through correct-first-time repairs and OEM parts.
• We’ll notify you of timelines and coordinate service, loaner options, or towing if needed.

What does it mean when the check engine light comes on in a 2002 Toyota Celica?

• The light signals a detected fault in emissions, ignition, fuel, or engine systems — from a loose gas cap to a serious misfire.
• A steady light usually indicates a non-emergency fault; flashing indicates an active misfire that needs immediate attention.
• Diagnostic trouble codes (DTCs) stored in the vehicle guide the repair process and prevent unnecessary part replacement.
• Our certified technicians use Toyota diagnostic tools to pinpoint the issue and protect warranty coverage.
• Addressing faults at a dealership often reduces repeat visits and saves money over time compared with incorrect DIY fixes.

How much does a check engine light diagnostic cost for a 2002 Toyota Celica?

• Diagnostic fees vary; basic code reading may be modest, while advanced diagnostics for intermittent faults can cost more.
• Nalley Toyota of Roswell provides transparent estimates and explains immediate vs. long-term costs for repairs and parts.
• We frequently cost less than independent shops overall by avoiding misdiagnosis and using OEM parts to prevent repeat failures.
• Any repairs covered under warranty must be completed at a certified dealership to maintain protection and ensure OEM parts.
• Contact our service department for current diagnostic specials and to schedule an appointment.

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

• Start with the simple: ensure the gas cap is tightened, as EVAP leaks are a common trigger.
• Listen for unusual noises and note performance changes (hesitation, stalling, loss of power).
• Have a certified diagnostic scan performed as soon as convenient to read stored trouble codes.
• For flashing lights, limit driving and bring the vehicle to Nalley Toyota of Roswell immediately to prevent engine or catalytic damage.
• Using dealership service preserves warranty eligibility and often reduces both immediate and lifetime repair costs.