Frequently Asked Questions

What is the most common reason for check engine light on a 2025 Jeep Wagoneer?

• Loose or damaged gas cap causing an EVAP system fault — quick, low-cost fix that often clears the code.
• Faulty oxygen (O2) sensor or heated O2 circuit leading to poor fuel trim and higher fuel use.
• Ignition misfires from spark plugs/coils or fuel delivery issues — can escalate to catalytic converter damage if unattended.
• Catalytic converter efficiency codes (costly if neglected); addressing early saves significant long-term expense.
• At Herb Chambers Millbury we diagnose with OEM tools, and our pricing often costs less than independent shops while providing factory-trained technicians and documented long-term savings.

What does it mean when the check engine light comes on in a 2025 Jeep Wagoneer?

• It signals the vehicle’s onboard computer has stored one or more diagnostic trouble codes that point to emissions, engine, or fuel system issues.
• The light can indicate anything from a minor emissions leak to a serious mechanical fault — severity varies by code.
• Immediate diagnostics at a certified dealership ensure correct code readout and OEM-level repair recommendations.
• Warranty-covered repairs must be completed at a certified dealership to preserve coverage and avoid long-term costs.
• Our service team provides transparent estimates and explains immediate and long-term savings when you choose dealership service.

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

• Check the gas cap for tightness and visible damage — a simple re-seal often clears EVAP codes.
• Note any dashboard messages, unusual smells, reduced power, or engine noise; document symptoms for the technician.
• Use a certified diagnostic scan to read stored codes; many issues require OEM-level tools for accurate diagnosis.
• If the light is flashing, stop driving and have the vehicle inspected immediately to prevent further damage.
• Schedule service at Herb Chambers Chrysler Dodge Jeep RAM FIAT of Millbury for professional evaluation and cost-effective repairs.

How much does a check engine light diagnostic cost for a 2025 Jeep Wagoneer?

• Diagnostic fees typically cover code retrieval and technician time — many dealerships offer a standard diagnostic price or waive it with repair.
• Minor repairs (e.g., gas cap, simple sensors) are low-cost; complex repairs (catalytic converter, major engine work) are higher but avoidable with early service.
• Herb Chambers Millbury often costs less than independent shops while providing factory-trained technicians and OEM parts for reliable, long-lasting repairs.
• Repairs covered under warranty must be performed at a certified dealership to maintain coverage and protect long-term savings.
• Visit our Service Specials for current offers: Service Specials, or schedule online at our Millbury service center.

How long does a check engine light service take?

• Basic diagnostics typically take 30–90 minutes depending on symptom complexity and technician workload.
• Simple fixes, like tightening or replacing a gas cap or swapping a sensor, can often be completed the same day.
• More involved repairs (ignition systems, catalytic converter replacement) require parts and can take several hours to a day or more.
• We provide time estimates, transparent pricing, and immediate/long-term cost benefits when work is handled by our certified service team.
• Book service or see special offers online: New Inventory | Used Inventory | Sell My Car.