Car Symptoms, Diagnosed

No code to look up? Start here. Each symptom page ranks the likely causes from cheapest to most expensive and tells you exactly what to check first — before anyone sells you parts.

• Burning Smell From the Engine Moderate
• Car Clicks But Won't Start Moderate
• Car Shakes When Braking Moderate
• Check Engine Light Flashing Stop driving
• Engine Overheating Stop driving
• Humming Noise While Driving Moderate
• Rough Idle (Engine Shakes at a Stop) Moderate
• Squealing Noise When Starting the Car Low
• White Smoke From the Exhaust Severe