Lemon Lawyers Reveal: How to Handle Persistent Engine Issues

Persistent engine problems can turn every drive into a guessing game—one day it’s a flashing check-engine light, the next it’s stalling or sudden loss of power. If this sounds familiar, California’s Lemon Law may provide options. Below, ZapLemon’s lemon lawyers explain, in plain English, how the law views repeat engine defects and what practical steps you can take to protect your rights.

Persistent Engine Problems and California Lemon Law

Engine defects often show up in repeat patterns: rough idle, misfires, hard starting, overheating, sudden stalling, oil consumption, turbo failures, or ongoing check-engine lights with recurring trouble codes. These issues can affect use, value, and—most importantly—safety. Even if a vehicle still drives, ongoing engine trouble can make it unreliable for daily commuting, road trips, or transporting family.

In California, the Song-Beverly Consumer Warranty Act (often called the California Lemon Law) requires manufacturers to repair defects that arise under the manufacturer’s warranty. If a defect substantially impairs the use, value, or safety of the vehicle and the manufacturer (through its authorized dealers) can’t fix it after a reasonable number of attempts, the law may require a repurchase or replacement. There’s also a “lemon law presumption” during the first 18 months or 18,000 miles: in general terms, four repair attempts for the same problem, two attempts for a defect likely to cause death or serious injury, or a total of 30 days out of service may trigger the presumption. The exact rules and exceptions are nuanced and fact-dependent.

For engine issues, “reasonable number of attempts” can turn on details: how severe the problem is, whether it compromises safety (for example, stalling or sudden loss of power on the freeway), and whether the dealer had a fair chance to diagnose and repair the defect. It typically matters that repairs were performed by an authorized dealership and that problems recurred despite those attempts. While the presumption can help, vehicles may still qualify outside of it depending on the circumstances. Because every case is unique, consultation with a lemon law attorney is important for guidance tailored to your situation.

Steps to Document Repairs, Warranty, and Next Moves

Start by building a complete paper trail. Keep all repair orders, even “no problem found” paperwork. Each repair order should list your complaint, the dealer’s diagnosis, and the work performed; confirm your mileage in/out and dates are accurate. Save photos or videos of symptoms (for instance, a cold-start rattle, smoke from the exhaust, or the instrument cluster with warning lights). Keep towing records, rental car receipts, and a simple timeline noting dates, mileage, and what happened. If you have a scan tool report showing diagnostic codes, save that too.

Check your warranty coverage. Read the warranty booklet (powertrain vs. bumper-to-bumper, certified pre-owned coverage, and any extended service contracts). Confirm you’re using an authorized dealer for warranty repairs. If the engine problem returns, bring it back promptly and describe the issue the same way each time so the history is clear. Ask the service advisor to document your concerns in detail and request a copy of the repair order before leaving. Avoid clearing codes yourself; let the dealer capture them. If the issue is intermittent, request a test drive with a technician so they can witness the symptom.

Consider next steps if repairs aren’t resolving the problem. You can contact the manufacturer’s customer care line to open a case and obtain a case number. Some manufacturers participate in informal dispute or arbitration programs, which may be optional or required before certain remedies—check your warranty booklet. Strict deadlines can apply to warranty and lemon law claims, and the facts, paperwork, and timing often determine your options. Because of this, many consumers choose to speak with a California lemon law attorney about strategy, timelines, and potential remedies. ZapLemon can review your documents, help you understand how the law may apply, and discuss your next move.

This article is for informational purposes only, is not legal advice, and does not create an attorney-client relationship. Results depend on the specific facts and law, and no outcome is promised or guaranteed. If you believe your vehicle may qualify as a lemon—or you just want help evaluating persistent engine issues—contact ZapLemon through the contact form on our website or call the number listed on this page to request a consultation.