Frequently Asked Questions

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

• Check basic items first: a loose or damaged gas cap, visible fluid leaks, and obvious wiring or connector issues under the hood.
• Confirm fuel level and recent fueling events — a loose gas cap or poor fill can trigger an emissions fault.
• If the vehicle runs normally and the light is steady, schedule a diagnostic scan at our dealership to read stored codes precisely.
• Remember: repairs covered under warranty must be performed at a certified dealership to maintain coverage and avoid unnecessary expense.

How much does a check engine light diagnostic cost for a 1998 Toyota Tacoma?

• Initial OBD-II code retrieval is often offered at a competitive price or as part of a service special; exact pricing is available at our service counter.
• We often cost less than independent shops while providing factory tools, genuine parts, and documented diagnostics for long-term savings.
• If further testing or repair is required, we provide transparent estimates before work begins and explain warranty implications.
• Any warranty-covered repair must be completed at a certified dealership to preserve coverage and ensure proper documentation.

What does it mean when the check engine light comes on in a 1998 Toyota Tacoma?

• A check engine light signals that the vehicle’s onboard diagnostics detected a system fault — it may be emissions, ignition, fuel, or sensor related.
• Codes indicate where to start: oxygen sensors, catalytic converter efficiency, fuel trim, or misfires are common culprits on older V6 Tacomas.
• Our technicians perform a full scan and inspection to identify root cause and recommend repairs that avoid repeat visits and extra cost.
• Choosing Nalley Toyota of Roswell offers immediate and long-term savings with certified repairs and factory expertise.

What is the most common reason for check engine light on a 1998 Toyota Tacoma?

• Common reasons include oxygen sensor failure, catalytic converter issues, ignition misfires, and evaporative emissions leaks (gas cap or EVAP components).
• Oxygen sensor and EVAP faults are frequent on older vehicles and can reduce fuel economy and emissions compliance if left unaddressed.
• We diagnose and repair using Toyota-approved parts, which helps prevent premature replacement and saves money over time.
• Warranty-covered repairs should be performed at a certified dealership to ensure coverage and long-term reliability.

How long does a check engine light service take?

• Basic diagnostic scans typically take 30–60 minutes; a detailed inspection and test-drive may extend that to a few hours depending on findings.
• If parts are required, repair time depends on part availability — we stock common items and can often complete service the same day.
• We prioritize accurate diagnosis over quick resets so you avoid repeat visits and higher lifetime costs.
• For warranty repairs, scheduling at our certified dealership ensures proper documentation and compliance with warranty terms.