Frequently Asked Questions

What does it mean when the check engine light comes on in a 2018 Jeep Renegade?

• It signals that the vehicle's engine management system has detected an issue — anything from a loose gas cap to an emissions or ignition fault.
• At Larry H. Miller Chrysler Dodge Jeep Ram 104th in Denver, CO, our certified technicians diagnose codes with OEM-grade tools so you get an accurate assessment and transparent estimate.
• We often cost less than independent shops because our technicians find and fix root causes faster, reducing repeat visits and long-term repair costs.
• Repairs covered under warranty must be completed at a certified dealership to preserve coverage; our team handles warranty work quickly and correctly.
• To book inspection and repair, schedule service or check current service specials. Service financing is available so you can get repairs now and pay later.

How long does a check engine light service take?

• Diagnostic scans typically take 30–60 minutes depending on symptoms; follow-up repairs vary by the issue found.
• At Larry H. Miller Chrysler Dodge Jeep Ram 104th we prioritize quick turnarounds using factory procedures, often completing common fixes the same day for the 2018 Jeep Renegade.
• Through efficient scheduling, OEM parts inventory, and certified technicians, we minimize downtime and deliver lasting value and savings over time.
• Use our site to schedule appointment and view current service specials that reduce your out-of-pocket cost.
• Service financing is available to help you address issues immediately without delaying essential repairs.

How much does a check engine light diagnostic cost for a 2018 Jeep Renegade?

• Diagnostic pricing can vary, but our dealership provides competitive, transparent diagnostic rates and will explain recommended repairs and expected savings.
• Larry H. Miller Chrysler Dodge Jeep Ram 104th often costs less than independent shops once you factor in correct diagnosis, OEM parts, warranty protection, and reduced rework.
• Immediate savings come from accurate fixes and genuine parts that avoid repeat visits; long-term savings come from preserving vehicle life and fuel efficiency.
• We offer service financing so you can proceed with necessary repairs now and pay over time, protecting both your budget and your vehicle.
• To get an exact price or to schedule service, visit our service scheduler or check available service specials.

What is the most common reason for check engine light on a 2018 Jeep Renegade?

• The most frequent causes are loose or faulty gas caps, oxygen sensor failures, catalytic converter issues, or ignition/misfire conditions.
• Left unaddressed, these can reduce fuel economy, increase emissions, and cause costly secondary damage over time.
• Our certified technicians at Larry H. Miller Chrysler Dodge Jeep Ram 104th in Denver quickly identify the root cause and recommend OEM repairs that protect vehicle value and longevity.
• We emphasize transparent pricing, immediate and long-term savings, and warranty-safe repairs performed by factory-trained techs.
• Book a quick diagnostic: schedule appointment or browse current service specials. Service financing is available.

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

• Start with simple checks: a securely fastened gas cap can often clear the light after a short drive.
• If the light persists, bring your 2018 Jeep Renegade to Larry H. Miller Chrysler Dodge Jeep Ram 104th for a professional scan — we have OEM tools and the proper diagnostic flow to isolate issues quickly.
• Our process reduces unnecessary parts replacement and delivers immediate and lasting savings compared to guesswork repairs.
• Remember, warranty-covered repairs must be performed at a certified dealership to maintain coverage; we handle warranty work end-to-end for peace of mind.
• To get started, schedule service online or see current service specials. Financing options make it easy to repair now and pay over time.

Check Engine Light Flashing

A flashing check engine light on a 2018 Jeep Renegade typically signals a severe condition — often an active misfire that risks catalytic converter damage and reduced drivability. When you see a flashing light, stop driving as soon as it is safe and bring the vehicle to Larry H. Miller Chrysler Dodge Jeep Ram 104th in Denver for immediate attention. Our factory-trained technicians use OEM diagnostic procedures to read active and pending codes, inspect ignition and fuel systems, and test emissions components. Addressing a flashing condition quickly limits repair scope, prevents costly secondary failures, and preserves safety. We maintain an available parts inventory and use genuine Mopar or OEM parts to ensure repairs meet factory specifications and warranty requirements. We encourage customers to take advantage of our current service specials and ask about service financing to make emergency repairs manageable. For urgent situations, please schedule service online or call our service team — we prioritize flashing-light cases to reduce downtime and protect your vehicle investment.

2018 Jeep Renegade Check Engine Light Reset

Resetting the check engine light on a 2018 Jeep Renegade can be a temporary measure, but it's critical to know why the light activated before clearing codes. At Larry H. Miller Chrysler Dodge Jeep Ram 104th, we explain the cause code, recommend the correct repair, and then reset the system so you leave with a reliable vehicle and a documented service history. DIY resets may clear a fault temporarily but can mask intermittent problems that grow into expensive repairs. Our technicians use OEM tools to verify repairs, perform test drives, and confirm the issue is resolved — preserving your vehicle's performance and resale value. Using genuine parts, warranty-backed labor, and transparent estimates, we deliver better long-term value than guessing repairs. If a repair is warranty-covered, it must be completed at a certified dealership to retain coverage, and we manage that process for you. To reset and repair properly, schedule appointment online and review current service specials to save on maintenance.

2018 Jeep Renegade Check Engine Light Codes

Common check engine light codes for the 2018 Jeep Renegade include P0420 (catalyst efficiency), P0300–P0304 (misfires), P0171/P0174 (fuel trim lean), and sensor-related codes like P0135 (O2 sensor heater). Each code has cost implications: ignoring P0420 can lead to expensive catalytic converter replacement; unaddressed misfires (P030x) can damage ignition coils and the catalytic converter; lean conditions reduce fuel efficiency and can cause engine damage over time. At Larry H. Miller Chrysler Dodge Jeep Ram 104th in Denver, CO, our certified technicians diagnose the specific code, explain probable causes, and present clear repair options with estimated costs and timelines. We emphasize immediate and long-term savings — an accurate dealership diagnosis avoids unnecessary part replacement and repeated shop visits. Using OEM parts and factory procedures ensures proper repairs and preserves warranties. You can schedule service online or review our service specials to reduce costs. Our team also offers service financing so you can proceed with needed repairs today and pay over time, protecting both your safety and your budget.