If your car suddenly loses power while passing on the freeway, it’s more than an inconvenience—it’s a serious safety risk. Many California drivers report “limp mode” incidents, throttle hesitation, stalling, or abrupt drop-offs in acceleration during highway merges and overtakes. When problems like these persist under warranty and the dealer can’t fix them, California’s lemon law may offer relief. ZapLemon is a California lemon law firm that helps consumers understand their rights and evaluate next steps, so you can decide what to do with confidence.
Sudden Power Loss While Passing? Your CA Lemon Rights
A sudden loss of power while passing can involve gas, diesel, hybrid, or EV systems. Common culprits include failing fuel pumps, turbo or supercharger issues, throttle body or accelerator pedal sensors, electronic control module problems, transmission control faults, inverter or battery management issues in hybrids/EVs, or software glitches that trigger “reduced power” modes. When this loss of power happens more than once and the dealer can’t resolve it under warranty, you may be dealing with a defect that materially affects the vehicle’s use, value, or safety.
California’s lemon law (the Song-Beverly Consumer Warranty Act) generally applies to new and many used vehicles purchased or leased in California that are covered by a manufacturer’s warranty. If the manufacturer or its authorized dealer has had a reasonable number of opportunities to repair a covered defect, you may have rights to remedies such as repurchase or replacement. What counts as a “reasonable number” isn’t a one-size-fits-all rule—safety-related defects like sudden power loss while passing often require fewer repair attempts than minor issues, but every situation is fact-specific.
California also has a “presumption” that can apply within the first 18 months or 18,000 miles after delivery, but you can still have lemon law rights outside that window. Extended powertrain or emissions warranties, technical service bulletins (TSBs), and recalls can all interact with your options. Not every power loss complaint will qualify under the lemon law, and outcomes depend on facts like warranty status, repair history, and whether the issue substantially impairs use, value, or safety. Speaking with a California-focused firm like ZapLemon can help you understand the process and timelines without making assumptions about the outcome.
What to Document and When to Call ZapLemon for Help
Start documenting the problem as soon as you experience sudden power loss while passing. Write down the date, time, speed, fuel level or state of charge, weather, warning lights or messages, and what you were doing (e.g., accelerating to overtake at 65 mph). If it’s safe, take photos or short videos of dashboard alerts. When you visit the dealer, describe the safety concern clearly: “vehicle loses power while passing/merging,” and ask the advisor to include your exact complaint in the repair order.
Keep copies of all repair orders and invoices, even when they say “no problem found” or “couldn’t duplicate.” Ask for details about diagnostic steps, fault codes, software updates, parts replaced, and road tests performed. If the dealer performs a software reflash or references a TSB, note the number. Consider using a simple log to track each incident, tow, rental, and day the vehicle is in the shop. Also check for recalls or known issues using your VIN on the NHTSA website.
As a general rule of thumb, it can be helpful to contact ZapLemon if the power loss has happened repeatedly, the dealer has had multiple chances to fix it, you’ve been out of service for many days, or you’re being told the behavior is “normal.” Safety-related defects often warrant prompt attention, and waiting can make documentation harder. A consultation can help you understand whether your situation may fall under California’s lemon law, what next steps to consider, and how to organize your records—without committing you to any particular path.
This article is for informational purposes only, is not legal advice, and does not create an attorney–client relationship. Attorney advertising: past results do not guarantee similar outcomes. If you believe your vehicle may qualify as a lemon—or you’re experiencing sudden loss of power while passing and want to understand your rights—contact ZapLemon for a consultation at (310) 489-3017 or visit https://zaplemon.com. We’re here to review your situation, explain the process in plain language, and help you decide on next steps.