Car symptoms & fixes
Something feel off with your car? Find the symptom below for what it usually means, the most likely causes ranked, whether it’s safe to keep driving, and a real cost range — then run a free diagnosis → for your exact vehicle.
Engine & performance
- Check engine light is onA steady check-engine light means the car stored a trouble code — anything from a loose gas cap to a misfire.Get it checked soon
- Engine idles rough or shakes at a stopA shaky, uneven idle at a stoplight usually points to a misfire, a vacuum leak, or dirty intake components.Get it checked soon
- Engine feels down on power or goes into limp modeSudden sluggishness or a capped RPM is often the engine protecting itself after detecting a fault.Address promptly
- Engine stalls or dies while driving or idlingAn engine that cuts out at idle or stops while driving usually has an air, fuel, or idle-control problem.Address promptly
- Worse gas mileage than usualA sudden drop in MPG often traces to sensors, tires, or a fuel-mixture problem rather than the engine itself.Safe to drive — monitor
Starting & electrical
- Car won’t start (clicks or cranks but won’t fire)A no-start splits into two cases: the engine won’t crank (usually electrical) or cranks but won’t fire (fuel or spark).Address promptly
- Battery / charging warning light is onThe battery light usually means a charging-system problem — most often the alternator, not the battery itself.Address promptly
- Flickering lights or odd electrical glitchesDimming lights, random warnings, or electronics that misbehave often trace to the battery, alternator, or grounds.Get it checked soon
Braking & steering
- Brakes squeal, squeak, or grindA high squeal usually means pads are due; a metallic grind means metal-on-metal and needs attention now.Address promptly
- Steering wheel or car shakes (especially when braking)A shimmy through the wheel often means warped rotors, an out-of-balance tire, or a worn suspension part.Get it checked soon
- Car pulls to one side while drivingA steady pull usually means alignment or tire pressure; a pull only when braking points to the brakes.Get it checked soon
Noises & vibration
- Grinding or growling noise while drivingA grind that changes with speed often means a wheel bearing; one that changes with braking points to brakes.Address promptly
- Burning smell from the engine or ventsThe type of smell matters: burning oil, hot brakes, electrical burning, and sweet coolant each mean different things.Address promptly
Overheating & fluids
- Engine temperature runs hot or overheatsA rising temperature gauge means the cooling system isn’t keeping up — low coolant, a stuck thermostat, or a failing pump.Stop driving — get help
- Coolant leak (puddle or dropping coolant level)A green, orange, or pink puddle and a sweet smell mean coolant is escaping — a leak that can lead to overheating.Address promptly
- Oil leak or low oil pressure warningDark puddles or an oil-pressure light mean the engine is losing or not circulating oil — don’t ignore the light.Address promptly
Transmission
Can’t find your exact symptom? Describe what’s happening in plain English and RedlineAi diagnoses it for your specific year, make and model — cross-checked against real recall and complaint data, with an honest confidence score.
Run a free diagnosis →Looking for a specific trouble code instead? Browse the OBD-II code library. Cost ranges here are broad, honest estimates to set expectations — not quotes. Always confirm with a licensed mechanic, especially for safety-related issues.