Frequently Asked Questions

What is the most common reason for check engine light on a 2026 Toyota 4Runner?

• Common causes include misfires, oxygen sensor faults, EVAP leaks, and catalytic converter warnings.
• Many issues start small but can escalate; early dealer diagnostics prevent costly repairs later.
• Our certified technicians trace root causes with OEM tools so fixes are accurate and long-lasting.
• Repairs performed at our dealership often cost less than independent shops over time due to correct diagnoses, OEM parts, and warranty protection.

What does it mean when the check engine light comes on in a 2026 Toyota 4Runner?

• The light signals the onboard computer detected a fault in emissions, fuel, ignition, or engine systems.
• It can indicate anything from a loose gas cap to a serious engine misfire; scanning the code is the first step.
• Bring your vehicle to Nalley Toyota Stonecrest so factory-trained technicians can read codes and recommend repairs.
• Warranty-covered repairs must be performed at a certified dealership to maintain coverage and ensure immediate and long-term savings.

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

• Check the gas cap: an improperly tightened or damaged cap is a frequent, simple cause of the light.
• If the cap is secure, schedule a quick diagnostic — our service team can often identify issues the same day.
• Do not ignore the light; timely dealer service prevents collateral damage and higher repair costs later.
• Using our dealership ensures warranty compliance, OEM parts, and factory-trained technicians who protect your vehicle’s value.

How much does a check engine light diagnostic cost for a 2026 Toyota 4Runner?

• Diagnostics at Nalley Toyota Stonecrest are competitively priced and designed to deliver value by finding the exact cause quickly.
• Our dealership often costs less than independent shops when you account for correct repairs, OEM parts, and warranty protection.
• If repairs are covered under warranty, they must be completed at a certified dealership to maintain coverage and long-term savings.
• Check our current service specials at Service Specials or contact us to confirm diagnostic pricing and available promotions.

How long does a check engine light service take?

• Simple diagnostics and minor repairs can often be completed within an hour or the same day.
• Complex issues that require parts or deeper inspection may take longer; we provide realistic time estimates after the initial scan.
• Our dealership prioritizes accurate diagnosis to avoid repeat visits and extra expense, maximizing immediate and long-term savings.
• Schedule service online or call us to arrange express or appointment-based service to minimize your downtime.