California Lemon Law for Camshaft Position Sensor Failures

If your car keeps lighting up the check engine light, stalls at stoplights, or struggles to start—and every visit to the dealership ends with “no problem found”—you may be dealing with a failing camshaft position sensor. In California, repeated, warranty-covered defects like this can raise lemon law questions. This article explains how camshaft position sensor issues show up, how California’s lemon law generally works, and what steps you can take to document the problem and protect your rights, all in plain language.

California Lemon Law: Camshaft Position Sensor Failures

A camshaft position sensor helps your engine computer time fuel injection and ignition. When it goes bad, the symptoms can be frustrating and unsafe: hard starts, rough idle, stalling, sudden loss of power, poor acceleration, or a check engine light (often with codes like P0340 or P0341). These problems can be intermittent—fine one day, scary the next—which makes them tough to replicate at the shop and easy for service departments to dismiss.

California’s lemon law (the Song-Beverly Consumer Warranty Act) generally protects consumers when a vehicle has a defect covered by the manufacturer’s warranty that substantially impairs use, value, or safety, and the manufacturer or its authorized dealers can’t fix it after a reasonable number of attempts. While every situation is fact-specific, the law includes a “presumption” guideline during the first 18 months or 18,000 miles that can help show what’s “reasonable” (for example, multiple repair attempts for the same issue, fewer attempts for serious safety defects, or 30 or more total days out of service). Even if you’re outside that window, you may still have rights depending on your warranty and repair history.

Camshaft sensor failures often fit the pattern of repeated warranty visits without a lasting fix. A technician might clear the code or replace the sensor, only for the problem to return weeks later. If the defect keeps you from driving confidently—say it stalls when merging or leaves you stranded—that can affect safety and value. The key is evidence: consistent documentation of symptoms, repair attempts, and days out of service can help establish whether your situation may meet California’s lemon law standards.

Steps to Document Repairs and Protect Your Rights

Write down what you’re experiencing as soon as it happens. Note date, mileage, speed, fuel level, weather, and what the car did (e.g., “stalled turning left at 15 mph,” “long crank when cold,” “CEL with rough idle”). If possible and safe, take photos or short videos of the check engine light and the behavior. When you visit the dealership, ask that your exact symptoms be written on the repair order in your own words and request copies of all paperwork before you leave.

Keep a folder—digital or paper—with every repair order and invoice, even if the dealer says “cannot duplicate.” Ask for the diagnostic trouble codes (DTCs), freeze-frame data, and any part numbers replaced. Track days out of service, tow bills, rental/loaner receipts, and rideshare costs. If the issue persists, open a case with the manufacturer’s customer care line and record the case number and call notes. Checking for Technical Service Bulletins (TSBs) and recalls on NHTSA.gov can also be helpful context.

At each visit, mention safety concerns plainly and consistently (e.g., “vehicle stalled in traffic”) and request that repairs be performed under the manufacturer’s warranty. If the problem is intermittent, offer to leave the vehicle longer or schedule an early-morning drop to help the tech replicate a cold-start symptom. You don’t need to diagnose the car—focus on describing what you see and feel. If repeated attempts don’t resolve the issue, consider consulting a California lemon law attorney. ZapLemon can review your records, answer questions, and help you understand next steps based on your specific situation.