Frequently Asked Questions

What is the most common reason for check engine light on a 1991 Toyota Land Cruiser?

• Loose or damaged gas cap causing an EVAP leak—simple to fix and often the first thing to verify.
• Oxygen (O2) sensor or mass airflow issues that affect fuel trim and emissions.
• Ignition system issues such as worn spark plugs or coils leading to misfires.
• EVAP system leaks and small vacuum leaks that reduce fuel efficiency.
• Addressing these early at our dealership often avoids larger repairs and saves money over time.

What does it mean when the check engine light comes on in a 1991 Toyota Land Cruiser?

• It signals the engine control unit detected an emissions or drivetrain fault—ranging from minor EVAP leaks to ignition misfires.
• The light can be steady (advisory) or flashing (urgent), each requiring different urgency for inspection.
• Diagnostics at our dealership read stored and pending codes to identify root cause quickly.
• Repairing issues promptly prevents secondary damage and protects fuel economy and emissions compliance.

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

• Confirm the gas cap is tightened; a loose cap is a frequent, low-cost cause of the light.
• Check for obvious signs: low oil, coolant levels, or visible leaks under the vehicle.
• Note any performance symptoms (stalling, rough idle, loss of power) to report to the technician.
• Bring your vehicle to our service center for a code read to ensure proper diagnosis and warranty protection.

How much does a check engine light diagnostic cost for a 1991 Toyota Land Cruiser?

• Diagnostics at Nalley Toyota of Roswell are competitively priced and often cost less than independent shops while delivering higher service quality.
• We provide immediate and long-term savings by using OEM parts, accurate diagnostics, and preventing repeat repairs.
• Estimated repair costs depend on the fault—simple fixes like a gas cap or sensor are low-cost; catalytic converter or engine repairs are higher.
• Remember: any repairs covered by warranty must be performed at a certified dealership to maintain coverage.

How long does a check engine light service take?

• Code reading and initial inspection typically take under an hour to identify the issue and outline next steps.
• Minor repairs (sensor replacement, gas cap, simple EVAP fixes) can often be completed the same day.
• More involved repairs (catalytic converter, in-depth engine work) require parts and scheduled service time—our team provides clear estimates and timelines.
• Choosing our dealership speeds accurate diagnosis and ensures warranty-covered repairs are performed by factory-trained technicians.