Frequently Asked Questions

What does it mean when the check engine light comes on in a 2020 Ram 1500?

• It signals that your truck's onboard diagnostics have detected an issue—anything from an emissions sensor fault to an ignition or fuel delivery problem.
• At Larry H. Miller Dodge RAM FIAT Tucson in Tucson, AZ, our factory-trained technicians use OEM-grade scanners to identify the exact fault quickly and accurately.
• We often cost less than independent shops because our efficient diagnostics target the real problem and reduce repeat visits—delivering immediate savings and long-term value.
• Repairs covered under warranty must be performed at a certified dealership to remain valid; our team will explain warranty options and required steps before any work begins.
• We offer service financing so you can get the repairs you need now and pay over time — and you can easily schedule service online.

How long does a check engine light service take?

• Most diagnostics are completed within the same visit—typically 30 to 90 minutes—depending on the complexity of the fault and whether parts or deeper testing are required.
• At Larry H. Miller Dodge RAM FIAT Tucson we prioritize quick turnarounds with clear communication, so you know expected timelines and costs up front.
• Choosing the dealership often means faster resolution because our technicians have direct access to OEM parts and manufacturer resources, reducing downtime and long-term repair costs.
• Check our current service specials for savings on diagnostics and related repairs.
• Ready to get started? Schedule service online and select a convenient appointment time.

How much does a check engine light diagnostic cost for a 2020 Ram 1500?

• Diagnostics commonly range from an affordable flat fee to more detailed inspections if additional testing is needed; typical market diagnostics start around $89 and can vary with scope.
• At Larry H. Miller Dodge RAM FIAT Tucson we deliver competitive pricing and transparent estimates—often costing less than independent shops while providing superior factory-level service.
• Choosing dealer service gives immediate savings from accurate diagnostics, OEM parts that last longer, and long-term savings by preventing repeat or worsening failures.
• Remember that warranty-covered repairs must be performed at a certified dealership to remain valid; our staff will verify coverage before work begins.
• We also offer service financing to help you manage the cost—schedule service today and ask our advisors about available options and current service specials.

What is the most common reason for check engine light on a 2020 Ram 1500?

• Common causes include a failing oxygen sensor, loose or faulty gas cap, catalytic converter issues, ignition coil or spark plug problems, and mass air flow sensor faults.
• If left unaddressed, these issues can reduce fuel economy, increase emissions, and cause more expensive damage—prompt diagnostics prevent escalation and protect resale value.
• Our certified technicians at Larry H. Miller Dodge RAM FIAT Tucson use OEM equipment to pinpoint causes and provide cost-effective repairs that often save you money versus repeated independent visits.
• We will advise on immediate fixes, long-term maintenance, and warranty implications; repairs under warranty must be completed at a certified dealership to remain covered.
• Book a convenient appointment online to get a full inspection and estimate: schedule service.

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

• Start with the easy checks: ensure the gas cap is tight and the fuel door is secured, as a loose cap is a common trigger for the light.
• If the light stays on, avoid guesswork—bring your 2020 Ram 1500 to Larry H. Miller Dodge RAM FIAT Tucson so technicians can run an accurate diagnostic scan and provide a clear repair plan.
• Our process focuses on transparency: we explain findings, outline options, and emphasize immediate and long-term savings through OEM parts and certified labor.
• For covered repairs, warranty rules require work at a certified dealership; we’ll check coverage and recommend whether to proceed under warranty or with paid service financing options.
• To get prioritized attention and the right repair the first time, schedule appointment online or review current service specials.