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Symptoms

Car Symptoms

Start from what you hear, smell, see or feel. Each symptom lists possible causes without ranking, safe checks and related fault codes.

By what you notice

Noises

Squealing When Turning The Steering Clunk When Shifting Into Drive Or Reverse Wind Noise At Speed Grinding Or Buzzing Noise When Pulling Away All: Noises →

Smells

Smell When Using The Heater For The First Time Raw Fuel Smell From The Exhaust Rotten Egg Or Acid Smell From The Battery Diesel Smell Inside The Car All: Smells →

Leaks

Oil Leak After An Oil Change Clutch Fluid Leak Differential Oil Leak AdBlue Leak Or White Crystals All: Leaks →

Vibrations

Car Shakes When Starting The Engine Shaking After New Tyres Vibration When Decelerating Gear Lever Vibrates All: Vibrations →

Smoke

Smoke After An Oil Change Smoke Or Mist From The Air Vents Smoke From The Oil Filler Cap Smoke From Under The Car All: Smoke →

Starting Problems

Long Cranking After The Car Has Stood Engine Keeps Running After Switching Off Automatic Only Starts In Neutral Diesel Won’t Start All: Starting Problems →

Driving And Performance

Car Brakes By Itself (Phantom Braking)Reverse Camera Not Working Phone Connection Keeps Dropping Infotainment Screen Freezing All: Driving And Performance →

Symptom checkerAnswer a few questions about what you notice. We show the possible causes, how urgent it is and safe checks you can do.

All symptoms

Heavy Or Stiff Clutch PedalCheck soonNormal risk Heavy SteeringCheck promptlyHigh risk Hesitation When AcceleratingCheck soonNormal risk High Idle SpeedCheck soonNormal risk Hissing Noise From The EngineCheck soonNormal risk Hissing Sound After Switching Off The EngineCheck soonNormal risk Horn Not WorkingCheck promptlyHigh risk Hot Or Burning Brakes SmellCheck promptlyHigh risk Humming Noise From A WheelCheck promptlyHigh risk Idle Drops When A/C Is Switched OnCheck soonNormal risk Infotainment Screen FreezingCheck soonNormal risk Instrument Cluster DeadCheck promptlyHigh risk Jerky Dual-clutch GearboxCheck soonNormal risk Key Not Detected Or Keyless Start Not WorkingCheck soonNormal risk Key Won’t Turn In The IgnitionCheck soonNormal risk Leaking Shock AbsorberCheck promptlyHigh risk Lights FlickeringCheck soonNormal risk Long Cranking After The Car Has StoodCheck soonNormal risk Loose Or Vague SteeringStop and checkCritical risk Loud Exhaust NoiseCheck soonNormal risk Many Warning Lights At OnceCheck promptlyHigh risk Milky Oil On The Dipstick Or Oil CapStop and checkCritical risk Musty Smell From The Air VentsCheck soonNormal risk No Heat From The HeaterCheck soonNormal risk Noise When Pressing The Clutch PedalCheck soonNormal risk Nothing Happens When Turning The KeyCheck soonNormal risk Oil In The CoolantStop and checkCritical risk Oil Leak After An Oil ChangeCheck promptlyHigh risk Oil Leak Under The CarCheck soonNormal risk Parking Brake Not HoldingStop and checkCritical risk Parking Sensors Beeping ConstantlyCheck soonNormal risk Phone Connection Keeps DroppingCheck soonNormal risk Poor Fuel EconomyCheck soonNormal risk Popping From The ExhaustCheck soonNormal risk Power Steering Fluid LeakCheck promptlyHigh risk Puff Of Smoke On Start-upCheck soonNormal risk Pulsating Brake PedalCheck soonNormal risk Radiator Fan Runs After Switching OffCheck soonNormal risk Rattling At IdleCheck soonNormal risk Rattling From The Rear Of The CarCheck soonNormal risk Rattling Noise On Cold StartCheck promptlyHigh risk Rattling Noise Under The CarCheck soonNormal risk Raw Fuel Smell From The ExhaustCheck soonNormal risk Reverse Camera Not WorkingCheck soonNormal risk Revs Fluctuate While DrivingCheck soonNormal risk Rotten Egg Or Acid Smell From The BatteryCheck promptlyHigh risk Rotten Egg Smell From The ExhaustCheck soonNormal risk Rough Or Unstable IdleCheck soonNormal risk Scraping Noise While DrivingCheck soonNormal risk Shaking After New TyresCheck soonNormal risk Shudder At Low SpeedCheck soonNormal risk Smell When Using The Heater For The First TimeCheck soonNormal risk Smoke After An Oil ChangeCheck soonNormal risk Smoke From A WheelStop and checkCritical risk Smoke From The DashboardStop and checkCritical risk Smoke From The Oil Filler CapCheck soonNormal risk Smoke From Under The BonnetStop and checkCritical risk Smoke From Under The CarStop and checkCritical risk Smoke Or Mist From The Air VentsStop and checkCritical risk Smoke When AcceleratingCheck soonNormal risk Soft Or Spongy Brake PedalStop and checkCritical risk Speedometer Not WorkingCheck soonNormal risk Squeaking SuspensionCheck soonNormal risk Squealing BrakesCheck promptlyHigh risk Squealing Noise From The EngineCheck soonNormal risk Squealing When Turning The SteeringCheck soonNormal risk Start-stop System Not WorkingCheck soonNormal risk Steam From Under The BonnetStop and checkCritical risk Steering Wheel Does Not Return To CentreCheck soonNormal risk Steering Wheel Not StraightCheck soonNormal risk Steering Wheel Shakes At SpeedCheck promptlyHigh risk Surging Or Hunting IdleCheck soonNormal risk Sweet Smell From The CarCheck promptlyHigh risk Thumping Noise From A TyreCheck promptlyHigh risk Ticking Noise After Switching Off The EngineCheck soonNormal risk Ticking Noise From The EngineCheck soonNormal risk Transmission Fluid LeakCheck promptlyHigh risk Transmission SlippingCheck promptlyHigh risk Turbo Boost Cuts OutCheck soonNormal risk Turn Signal Blinking FastCheck soonNormal risk Tyre Keeps Losing PressureCheck promptlyHigh risk Uneven Tyre WearCheck soonNormal risk Vibration At Motorway SpeedCheck soonNormal risk Vibration Felt Through The FloorCheck soonNormal risk Vibration In Drive When StoppedCheck soonNormal risk Vibration When BrakingCheck promptlyHigh risk Vibration When DeceleratingCheck soonNormal risk Vibration When The Air Conditioning Is OnCheck soonNormal risk Vibration When TurningCheck promptlyHigh risk Water Dripping From The HeadlinerCheck soonNormal risk Water Dripping Under The CarCheck soonNormal risk Water In The BootCheck soonNormal risk Water In The FootwellCheck soonNormal risk Whining Noise From The Fuel TankCheck soonNormal risk Whining Noise From The Rear Of The CarCheck soonNormal risk Whining Noise While DrivingCheck soonNormal risk Whistling Noise When AcceleratingCheck soonNormal risk White Smoke From The ExhaustCheck promptlyHigh risk White Smoke On A Cold StartCheck soonNormal risk Wind Noise At SpeedCheck soonNormal risk