Frequently Asked Questions

How long does a check engine light service take?

• Typical diagnostic scan and inspection: 30–60 minutes for a straightforward read and initial assessment.
• Minor repairs (e.g., gas cap, sensor swap): often completed the same day; more involved repairs can take several hours to a full day.
• Complex repairs (catalytic converter, engine/mechanical issues): may require parts ordering and multi-day scheduling.
• Nalley Toyota of Roswell often completes work faster and at lower overall cost than many independent shops because our factory-trained technicians use OEM parts and efficient workflows.
• Remember: warranty-covered repairs must be performed at a certified dealership to preserve coverage and maximize long-term savings.

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

• The light signals the engine control unit has detected a fault — ranging from minor emissions issues to serious mechanical problems.
• Common causes include EVAP leaks, oxygen sensor faults, ignition misfires, and catalytic converter issues; severity varies by code.
• If steady, it often indicates a non-urgent but important issue; if flashing, it can indicate a severe misfire that risks catalytic damage.
• Bring your 2002 Toyota Tundra to Nalley Toyota of Roswell for an accurate scan and transparent estimate — our dealership often costs less than independents while offering factory training and OEM parts.
• For any warranty-covered items, repairs must be completed at a certified dealership to retain coverage and ensure long-term savings.

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

• Check the gas cap: a loose or damaged cap is a very common cause of an EVAP code and is an easy fix.
• Look for obvious issues: low oil, coolant leaks, or disconnected vacuum lines that can sometimes be identified visually.
• Note vehicle behavior: reduced power, rough idle, or unusual noises — these clues help prioritize urgency.
• A quick diagnostic scan at Nalley Toyota of Roswell will read stored codes and recommend the correct repair path, preserving warranty and minimizing long-term costs.

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

• Diagnostics typically range from a modest fee for a code scan and initial inspection to higher amounts if extended troubleshooting is needed; pricing varies by complexity.
• Nalley Toyota of Roswell offers competitive diagnostic pricing and often costs less than independent shops when considering accurate diagnosis, OEM parts, and factory-trained labor.
• Immediate savings come from getting the right repair the first time; long-term savings derive from proper parts, expert installation, and warranty protection.
• If the issue is covered under warranty, repairs must be performed at a certified dealership to ensure coverage and reduce out-of-pocket expense over time.

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

• Common triggers include a loose gas cap, faulty oxygen sensors, EVAP system leaks, worn spark plugs or ignition components, and catalytic converter issues.
• Oxygen sensor failures and EVAP faults are frequent on older vehicles and can affect fuel economy and emissions if left unattended.
• Early diagnosis at Nalley Toyota of Roswell helps prevent escalation to more costly repairs and keeps your Tundra running efficiently.
• For warranty-related part replacements, having the work done at a certified dealership ensures coverage and long-term cost benefits.