When a brand-new car rolls off the lot with a “misfire detected” message or a glowing check engine light, it’s more than disappointing—it can be a sign of a defect covered by California’s Lemon Law. This article explains, in plain language, how the law may apply to misfire issues discovered at or shortly after delivery, and what steps you can take to protect your rights. It’s educational information only, not legal advice; for guidance on your specific situation, please contact ZapLemon for a consultation.
Misfire Detected on Delivery: What CA Law Covers
A misfire happens when one or more engine cylinders fail to ignite properly, often triggering error codes like P0300–P030X and a check engine light. If that warning appears at delivery or within days of purchase, it may indicate the defect existed when you took possession. Beyond annoyance, misfires can reduce performance, cause stalling, damage the catalytic converter, and lead to failed emissions tests—issues that can affect the use, value, or safety of the vehicle.
California’s Lemon Law (the Song-Beverly Consumer Warranty Act) generally covers new vehicles and certain used vehicles sold or leased with the manufacturer’s warranty. The law requires the manufacturer to repair warranty-covered defects within a reasonable number of attempts. While “reasonable” depends on the facts, California’s “lemon law presumption” provides helpful guidelines if the problem appears within the first 18 months or 18,000 miles: for example, two or more repair attempts for a serious safety defect, four or more for other defects, or 30+ total days in the shop may satisfy the standard.
A misfire detected on delivery can be particularly significant because it suggests a defect from day one. Depending on the root cause—ignition coils, injectors, sensors, ECU/PCM, or emissions components—the repair may be covered by standard or California emissions warranties. If the manufacturer can’t fix the issue after a reasonable number of attempts, potential remedies under the law can include a repurchase (buyback) or replacement, and sometimes incidental damages like towing or rental—though outcomes depend on individual facts and require a legal evaluation.
Steps to Take and Records to Keep for Lemon Claims
If a misfire is detected at delivery, document everything immediately. Take photos of the dash lights, note any rough idle or stalling, and capture any “Misfire Detected” message or scan tool codes. Notify the dealer in writing, request prompt warranty service, and ask whether the vehicle should be towed rather than driven. Keep copies of all communications and follow the maintenance and warranty instructions in your owner’s manual.
Thorough records are essential in any lemon claim. For each repair visit, request an itemized repair order that includes your complaint (“customer states check engine light/misfire”), the technician’s diagnosis, any OBD-II codes noted, parts replaced, dates in and out, and the vehicle’s mileage. Track the number of repair attempts for the same issue and the total days your vehicle is out of service. Save purchase or lease paperwork, warranty booklets, recall or TSB notices, tow and rental receipts, and screenshots or videos of the symptoms when safe to capture.
Consider speaking with a lemon law attorney if the misfire persists after repeated repairs, the vehicle has been in the shop for extended periods, or you’re told “no problem found” despite ongoing issues. Some manufacturers offer arbitration programs, which you may choose to explore; however, these programs are optional and have pros and cons. California law has deadlines, and strategic choices early on—like how you describe the issue on repair orders—can affect your options, so a consultation can help you understand your rights before you decide next steps.
This article is for general informational purposes only, is not legal advice, and does not create an attorney–client relationship. Results vary based on specific facts, and no outcome is promised or guaranteed. Attorney advertising.
If you believe your vehicle may qualify as a lemon due to a misfire detected at delivery or ongoing engine issues, contact ZapLemon for a consultation at [phone number] or visit [website]. Our team can review your documents, walk you through your options, and help you understand the next steps.