Crankshaft sensor problems can turn a dependable daily driver into an unpredictable headache. If your vehicle stalls, refuses to start, or flashes a Check Engine Light tied to crankshaft position sensor codes, you’re not alone—and you may have rights under California’s lemon law. This article explains how crankshaft sensor failures show up, how California’s Song-Beverly Consumer Warranty Act may apply, and what steps to take to protect your records and your options. This is general information only and not legal advice.
Crankshaft Sensor Failures and California Lemon Law
Modern engines rely on the crankshaft position sensor (often called the CPS or CKP) to tell the computer when to deliver fuel and spark. When it fails or reads intermittently, the symptoms can be alarming: sudden stalling at stoplights or on the freeway, hard or no-start conditions, rough running, misfires, fluctuating RPMs, and persistent Check Engine Lights (commonly codes like P0335–P0339). Because these issues can appear sporadically—sometimes only when hot, in cold weather, or after long drives—drivers can end up making repeated trips to the dealer without a lasting fix.
California’s lemon law, formally the Song-Beverly Consumer Warranty Act, can protect consumers when a manufacturer or its authorized repair facility can’t repair a substantial defect after a reasonable number of attempts during the warranty period. “Substantial” generally means the issue impairs the vehicle’s use, value, or safety. A crankshaft sensor failure that causes repeated stalling, no-start events, or loss of power can fit that description, particularly when it creates safety risks or leaves the car unusable for extended periods.
If the criteria are met, potential remedies under California law may include a repurchase (buyback), a replacement vehicle, or a cash settlement to account for diminished value—though outcomes vary case by case. There can be a mileage offset for the period before the defect first appeared, and timing rules apply. In some circumstances, California law allows for civil penalties if a manufacturer willfully fails to comply, and prevailing consumers may recover reasonable attorney’s fees and costs under the statute. Because every situation is fact-specific, a consultation is important to understand how the law may apply to your circumstances.
What to Document and When to Contact ZapLemon
Good documentation can make or break a lemon law claim. Keep every repair order and make sure each one lists your reported symptoms in your own words (for example, “stalls after 20 minutes on freeway,” “no-start when hot,” “CEL P0335”). Note the dates, mileage in and out, and the dealer’s findings, including any replaced parts like sensors, harnesses, or engine control modules. Save tow receipts, rental or rideshare expenses, and any written or text/email conversations with the dealership or manufacturer.
Also track “days out of service.” California lemon law looks not only at the number of repair attempts but also at how long the vehicle was unavailable for use—30 or more cumulative days can be significant. If issues are intermittent, keep a simple log with dates, conditions (hot/cold, highway/city), and what happened. Photos or short videos of warning lights, erratic tachometer readings, or no-start attempts can help corroborate your reports.
As a general rule of thumb, consider contacting ZapLemon if your CPS-related problems persist after multiple repair visits, if the vehicle has been in the shop for long stretches, or if the defect creates a safety concern like stalling in traffic. You don’t have to wait until the fourth or fifth repair attempt to talk. Early guidance can help you navigate warranty coverage, manufacturer customer-care processes, and any arbitration programs that might apply. California has deadlines that can affect your rights, so it’s wise to act promptly and get a personalized assessment.
This article is for informational purposes only and is not legal advice. Reading it does not create an attorney-client relationship with ZapLemon. Past results do not guarantee a similar outcome, and laws can change or apply differently based on your facts. If you believe your vehicle may qualify as a lemon due to crankshaft sensor failures or related stalling/no-start issues, contact ZapLemon for a consultation at (310) 489-3017 or visit https://zaplemon.com. We can review your documentation, explain your options, and help you understand the next steps under California law.