Towing puts unique stress on trucks and SUVs, and when Tow/Haul Mode doesn’t work as designed, it can create real safety and drivability concerns. If your vehicle won’t engage tow mode, drops out under load, overheats, or triggers warnings while pulling a trailer, you may be wondering whether California’s Lemon Law can help. Below, ZapLemon explains how tow mode problems fit under California law and what you can do to document issues for a potential lemon claim.
What Tow Mode Problems Mean Under California Lemon Law
Tow or Tow/Haul Mode is supposed to adjust transmission shift points, increase engine braking, and coordinate with systems like trailer brake controllers and trailer sway control. Common tow mode defects include failure to engage, unexpected disengagement under load, harsh or erratic shifting, overheating warnings, limp mode when towing, malfunctioning integrated trailer brake controls, and software updates that don’t fix the issue. These problems can show up in pickups, SUVs, and vans—especially when towing near rated capacity, in hot weather, or on steep grades.
Under California’s Song-Beverly Consumer Warranty Act (the “Lemon Law”), a vehicle may qualify as a lemon if a defect covered by the manufacturer’s warranty substantially impairs the vehicle’s use, value, or safety, and the manufacturer or its authorized dealer can’t repair it after a reasonable number of attempts. California also has a legal “presumption” that may apply in the first 18 months or 18,000 miles: typically 2 attempts for a serious safety defect, 4 attempts for other defects, or 30 cumulative days out of service. The presumption isn’t required to win a case—it’s just a helpful guideline—and every situation depends on the facts.
Tow mode defects can meet Lemon Law standards because they directly affect safety and use when towing. Examples include a transmission that overheats and limits power on grades, a tow mode that disengages and eliminates engine braking, or a trailer brake controller that intermittently fails—all of which can make towing dangerous and undermine the vehicle’s purpose for buyers who tow. If the defect persists despite reasonable repair attempts during the warranty period, remedies under the law may include repurchase or replacement, or sometimes a cash-and-keep settlement. Results vary, and whether a claim is viable depends on details like warranty coverage, repair history, and how the problem impairs your particular use.
How to Document Tow Mode Defects for Lemon Claims
Good documentation is essential. Each time you visit the dealer, describe the towing conditions that trigger the problem—trailer weight, road grade, speed, outside temperature, and whether the integrated trailer brake controller was connected. Ask the service advisor to include those details in the repair order and to note any warning lights, messages, or limp-mode events. If safe and permitted by the dealer, bring the trailer or load so they can attempt to duplicate the concern.
Keep a file with all repair orders and invoices, even for “no trouble found” visits. Save photos or videos of dash messages (Tow/Haul unavailable, transmission hot, trailer brake system fault), gear hunting, or unexpected disengagements. Track dates the vehicle is in the shop, mileage in/out, parts replaced, software versions updated, and any roadside tows or rentals; those days may count toward the 30-day out-of-service benchmark. If you use an OBD-II scanner, save freeze-frame data or codes provided by the dealer.
Create a simple towing log. Note trip dates, trailer type and approximate weight (attach a weight ticket if you have one), ambient temperature, route/grade (for example, I-5 Grapevine), symptoms experienced, and whether tow mode was engaged. If the dealer mentions a technical service bulletin (TSB) or software update, ask for the bulletin number and a copy of the repair write-up. You can also check for recalls, file a complaint with NHTSA if the issue raises safety concerns, and consider contacting ZapLemon to discuss next steps and timelines. Avoid modifications that could complicate warranty coverage, and always follow safety guidance in your owner’s manual.
Tow mode is more than a convenience—it’s a safety and performance feature that should work reliably when you need it most. If repeated repairs haven’t fixed your vehicle’s towing problems, you may have rights under California’s Lemon Law, but every case depends on its specific facts, repair history, and warranty status. To talk through your situation, contact ZapLemon at [phone number] or visit www.zaplemon.com for a consultation.
Disclaimer: This article is for informational purposes only and is not legal advice. Reading this page does not create an attorney-client relationship with ZapLemon. Past results do not guarantee similar outcomes. Laws and procedures change, and your facts matter—please consult an attorney for advice about your specific circumstances. Attorney advertising.