Frequently Asked Questions

What does it mean when the check engine light comes on in a 2018 Ram Promaster Cargo Van?

• It signals the vehicle’s onboard diagnostics (OBD-II) detected an issue — anything from a loose gas cap to emissions or engine sensor faults.
• At Larry H. Miller Chrysler Dodge Ram FIAT Denver our certified technicians use factory-grade scanners to identify accurate fault codes and explain potential repairs clearly.
• We emphasize quick diagnosis, transparent pricing, OEM parts, and repairs that preserve long-term value and fuel efficiency.
• Repairs covered by any warranty must be completed at a certified dealership to maintain coverage; we can confirm warranty status during inspection.
• We offer service financing so you can get repairs now and pay later — and you can schedule service online today.

How long does a check engine light service take?

• Basic diagnostics typically take under an hour; full repairs vary by fault. Our team prioritizes accurate diagnosis to avoid unnecessary work.
• Many common fixes — sensor replacements, loose cap checks, minor emissions repairs — can be completed same day with OEM parts available on-site.
• We provide clear time estimates up front and expedite parts when possible; ask about our current service specials for faster, more affordable care.
• To reserve an appointment, schedule service online and choose a convenient time slot with our certified technicians.

How much does a check engine light diagnostic cost for a 2018 Ram Promaster Cargo Van?

• Diagnostics at Larry H. Miller Chrysler Dodge Ram FIAT Denver start at $89.25 for check engine scans and troubleshooting.
• Our pricing often costs less than independent shops while delivering higher service levels thanks to factory-trained technicians and OEM tooling.
• Choosing dealership service saves money over time through accurate repairs, genuine parts, preserved resale value, and warranty protection.
• Ask our service advisors about financing options to handle repairs now and pay over time; you can also view current service specials.

What is the most common reason for check engine light on a 2018 Ram Promaster Cargo Van?

• Common causes include a faulty oxygen sensor, catalytic converter issues, mass air flow sensor problems, or an emissions control fault.
• Left unaddressed, these can reduce fuel economy, increase emissions, or cause expensive downstream damage — prompt diagnosis prevents larger bills.
• Our certified technicians diagnose root causes and recommend OEM repairs that restore performance and efficiency, with warranties available on parts and labor.
• To get a fast, reliable diagnosis, schedule service and take advantage of available service specials.

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

• Start with simple checks: confirm the gas cap is tightened and inspect for obvious fluid leaks or visible wiring damage.
• If the light remains, bring the vehicle to our service center for a proper OBD-II scan — we identify stored codes and give a clear plan.
• We provide an upfront estimate and explain immediate and long-term savings of dealer-performed repairs, along with warranty implications.
• To book a diagnostic, schedule service online or review our current service specials.