When trying to start the engine, the crankshaft does not rotate
1. The battery is low or defective (see «Battery - Service»).
2. Insufficiently tightened or oxidized wire terminals on the battery terminals (see «Battery - Service»).
3. Faulty starter circuit (see «Starter - checking the technical condition»),
4. Defective starter relay (see «Starter - checking the technical condition»),
5. Faulty starter (see «Starter - checking the technical condition»).
6. Faulty switch (lock) ignition (see «Contact group of the ignition switch - check and replacement»).
The crankshaft rotates but the engine does not start (or the engine starts but stops immediately)
1. No fuel in the tank (check fuel gauge readings).
2. The crankshaft does not rotate fast enough to start the engine due to a low charge of the battery or oxidized terminals on its terminals (see «Battery - Service»).
3. Malfunction of fuel supply elements (see «Engine management system - checking the technical condition and diagnosing faults»).
4. Leakage in intake pipe or vacuum hoses (see «Engine management system - checking the technical condition and diagnosing faults»).
5. Faulty engine management system (see «Engine management system - checking the technical condition and diagnosing faults»).
6. Faulty electrical circuit of the ignition module (see «Engine management system - checking the technical condition and diagnosing faults»).
7. Faulty crankshaft position sensor or its electrical circuit (see «Engine management system - checking the technical condition and diagnosing faults»).
8. Low compression in the engine cylinders (see «Checking compression in the engine cylinders»).
9. Engine start blocked by immobilizer (contact a specialized service).
10. Broken timing belt (see «Timing belt - condition check, tension adjustment and replacement»).
When the engine is running, the control lamp for a malfunction of the engine management system lights up (may be accompanied by deterioration in engine performance, see below)
Failure of the elements of the control system or their electrical circuits (see «Engine management system - checking the technical condition and diagnosing faults»).
Difficulty starting a cold or hot engine (the warning lamp for a malfunction of the engine management system may light up, see above)
1. Clogged air filter (only when it is difficult to start a hot engine, see «Air filter - filter element replacement»).
2. The battery is discharged or the electrolyte level is insufficient (only if it is difficult to start a cold engine, see «Battery - service»).
3. Malfunction of fuel supply elements (see «Engine management system - checking the technical condition and diagnosing faults»).
4. Defective coolant temperature sensor of the engine management system (see «Engine management system - checking the technical condition and diagnosing faults»).
5. Faulty engine management system (see «Engine management system - checking the technical condition and diagnosing faults»).
The engine speed at idle speed either decreases or increases (the warning lamp for a malfunction of the engine management system may light up, see above)
1. Leakage in intake pipe or vacuum hoses (see «Engine management system - checking the technical condition and diagnosing faults»).
2. Faulty idle speed controller (see «Engine management system - checking the technical condition and diagnosing faults»).
3. Faulty absolute pressure sensor in the intake manifold (see «Engine management system - checking the technical condition and diagnosing faults»).
4. The temperature sensor of the air entering the cylinders is faulty (see «Engine management system - checking the technical condition and diagnosing faults»).
5. Insufficient operating pressure in the fuel rail (see 101, «Fuel Line - Operating Pressure Check»).
6. Damaged cylinder head gasket (see «Cylinder head - gasket replacement»).
7. Wear of the timing belt and / or tension roller (see «Timing belt - condition check, tension adjustment and replacement»).
Misfire (engine interruptions) idle and/or under load (the warning lamp for a malfunction of the engine management system may light up, see above)
1. Faulty spark plugs or electrode gap set incorrectly (see «Spark plugs - check and replacement»).
2. Leakage in intake pipe or vacuum hoses (see «Engine management system - checking the technical condition and diagnosing faults»).
3. Clogged fuel filter and / or pipelines of the engine power system (see «Fuel Line - Operating Pressure Check»).
4. Faulty fuel injectors (see «Nozzles - check and replacement»).
5. Insufficient compression in the engine cylinders (see «Checking compression in the engine cylinders»).
6. Faulty ignition module (see «Ignition module - check and replace»).
7. Leakage (burnout) gas distribution valves (see «Cylinder head - check»).
The engine does not develop power (the warning lamp for a malfunction of the engine management system may light up, see above)
1. Clogged air filter (see «Air filter - filter element replacement»).
2. Leakage (burnout) gas distribution valves (see «Cylinder head - check»).
3. Incorrect installation of valve timing (see «Timing belt - condition check, tension adjustment and replacement»).
4. Faulty throttle position sensor (see «Engine management system - checking the technical condition and diagnosing faults»).
5. Faulty absolute pressure sensor in the intake manifold (see «Engine management system - checking the technical condition and diagnosing faults»).
6. Faulty engine management system (see «Engine Management System—Condition Check and Troubleshooting»).
7. Wedging of working cylinders of brake mechanisms (see «Brake system - check of technical condition»).
8. Clutch slips (see «Clutch - condition check»).
9. Clogged fuel filter and / or pipelines of the engine power system (see «Fuel Line - Operating Pressure Check»).
10. Insufficient compression in the engine cylinders (see «Checking compression in the engine cylinders»).
11. Faulty exhaust system (see «System of release of the fulfilled gases - check of a technical condition»).
12. Incorrectly adjusted throttle cable (see «Throttle cable - replacement»).
Detonation knocks. A sharp knock of a double tone appears with a sharp increase in the load on the engine (the warning lamp for a malfunction of the engine management system may light up, see above)
1. The octane number of gasoline is below 91 (if knocks appeared immediately after refueling the car with fuel).
2. Engine overheating (check the readings of the coolant temperature sensor and, if the engine is really overheating, eliminate the cause of overheating, see below).
3. Faulty knock sensor (see «Engine management system - checking the technical condition and diagnosing faults»).
4. Faulty engine management system (see «Engine management system - checking the technical condition and diagnosing faults»).
5. Carbon deposits on valves and in combustion chambers (see «Cylinder head - check»).
Engine noises and knocks (except detonation knocks, see above)
Wear of pistons, cylinders, malfunction of the timing mechanism (see «Engine - condition check»).
Increased fuel consumption
1. Clogged air filter (see «Air filter - filter element replacement»).
2. Defective oxygen concentration sensor in exhaust gases (see «Engine management system - checking the technical condition and diagnosing faults»),
3. Faulty engine management system (see «Engine management system - checking the technical condition and diagnosing faults»).
4. Faulty fuel injectors (see «Nozzles - check and replacement»).
5. Insufficient tire pressure (see «Checking tire pressure»).
Engine overheating
1. Insufficient coolant level in the cooling system (see «Checking the levels of technical fluids»).
2. Malfunction of the pump of the cooling system (see «Cooling system - checking the technical condition»).
3. The radiator of the engine cooling system is clogged (see «Radiator of the cooling system - replacement»).
4. Faulty thermostat (see «Cooling system - checking the technical condition»).
5. Faulty electric fan of the engine cooling system (see «Electric fans of the cooling system - checking and replacing the additional resistor»).
6. Faulty valves in the cap of the expansion tank (replace cap).
Glow ignition (the engine continues to run for a while after the ignition is turned off)
1. High idle (see «Engine management system - checking the technical condition and diagnosing faults»).
2. Engine overheating (check the reading of the coolant temperature gauge and if the engine is really overheating, eliminate the cause of overheating, see above).
3. The use of candles with an inappropriate glow number (see «Spark plugs - check and replacement»).
4. Carbon deposits on valves and in combustion chambers (see «Cylinder head - check»).
Increased oil consumption (oil stains or smudges appear under the engine or on its surface; not accompanied by blue smoke from the exhaust pipe when the engine is running)
1. Leaky oil pan gasket or drain plug sealing washer (see «Engine - condition check»).
2. The seal of the emergency oil pressure sensor is broken (see «Emergency oil pressure sensor in the engine - check and replace»).
3. Leaky cylinder head cover gasket (see «Cylinder head cover - removal, gasket replacement and installation»).
4. Worn or damaged crankshaft seals (see «Front crankshaft oil seal - replacement», «Rear crankshaft oil seal - replacement»).
Increased oil consumption (accompanied by bluish smoke from the exhaust pipe when the engine is running, without external signs of oil leakage, see above)
1. Wear of valve stem seals (see «Oil seals - replacement»).
2. Wear, sticking or breakage of piston rings (see «Engine - condition check»).
Decreased coolant level
1. Damage to the cooling system hoses or loosening of their fastening clamps (see «Cooling system - checking the technical condition»).
2. Damage to the radiator of the cooling system (see «Radiator of the cooling system - replacement»).
3. Damage to the air conditioner radiator (see «Air conditioning system - checking the technical condition»).
4. Ditch gasket damage (see «Engine - condition check»).
Fuel leaks and/or smell of gasoline
1. Leakage in fuel lines (see «Engine management system - checking the technical condition and diagnosing faults»).
2. Fuel tank full (do not fill the car «under the cork»).
3. Leakage of fuel injectors (see «Nozzles - check and replacement»).
When the engine is running, the emergency oil pressure warning lamp lights up
1. Insufficient oil level (see «Checking the levels of technical fluids»).
2. Idle speed below normal (see «Engine management system - checking the technical condition and diagnosing faults»).
3. Short circuit in the sensor circuit - control lamp (see «Emergency oil pressure sensor - check and replace»).
4. The sensor of a control lamp of emergency oil pressure is faulty (see «Emergency oil pressure sensor - check and replace»).
5. Worn crankshaft and/or oil pump main bearings (see «Lubrication system - checking oil pressure»).
Battery not charging (battery charge warning lamp does not go out after starting the engine)
1. Worn or insufficiently tensioned accessory drive belt (see «Accessory drive belt - condition check and replacement»).
2. Low electrolyte level in the battery (see «Battery - removal and installation»).
3. Insufficiently tightened or oxidized terminals on the terminals of the battery (see «Battery - Maintenance»).
4. Faulty generator (see «Generator - check without removing it from the car»).
5. Faulty voltage regulator (see «Generator - check without removing it from the car»).
6. Faulty battery charging circuit (see «Generator - check without removing it from the car»).
The control lamp of a charge of the storage battery does not light up at inclusion of ignition
1. Pilot lamp burnt out (see «Instrument panel - lamp replacement»).
2. Faulty electrical circuit of the excitation winding of the generator (see «Generator - check without removing it from the car»).
Various warning lamps on the instrument panel light up while driving
Malfunction of various vehicle components (see «Controls and control devices»).
The starter makes a lot of noise (grinding)
1. Loose tightening of the starter mounting bolts (see «Starter - removal and installation»).
2. Faulty starter or its traction relay (see «Starter - checking the technical condition»).
Clutch slips (engine speed increases, but the car does not accelerate)
1. Oil ingress on the working surfaces of the driven disk (see «Clutch - condition check»).
2. Strong wear, warping or burning of the lining of the driven disk (see «Clutch - check and replace»).
Difficult or impossible gear shifting
1. The adjustment of the gear shift drive is broken (see «Gear shift lever - replacement and adjustment»).
2. Deformed gearshift drive rod (see «Gear shift lever - replacement and adjustment», «Gearshift drive - removal, repair and installation»).
3. Breakage or wear of the plastic parts of the shift mechanism drive (see «Gearshift drive - removal, repair and installation»).
Knock (clicks) when turning the car at low speed
1. Wear of external constant velocity joints (see «Front wheel drives - checking the technical condition»).
2. Loose front suspension fasteners (see «Front suspension - check of technical condition»).
3. Loose steering hardware (see «Steering - condition check»).
4. Failure of differential parts (see «Manual transmission - checking the technical condition» or «Automatic transmission - checking the technical condition»).
Vibration when driving at high speed (over 90 km/h)
1. The balance of the front wheels of the car is broken (have the wheels balanced in a specialist workshop).
2. The geometry of the tires or wheel rims is broken due to deformation (see «Rims, tires and hubs - checking the technical condition»).
3. Wear of the hinges of equal angular speeds of the front wheel drives (see «Front wheel drives - checking the technical condition»).
Driving the vehicle away from straight ahead
1. Different pressure in the tires of the front wheels (see «Checking tire pressure»).
2. Different degree of wear of the tires of the front wheels (see «Rims, tires and hubs - checking the technical condition»).
3. Faulty front or rear shock absorbers (see «Front suspension - check of technical condition», «Rear suspension - check of technical condition»).
4. Breakage of one of the springs of the front or rear suspension (see «Front suspension - check of technical condition», «Rear suspension - check of technical condition»).
5. The adjustment of the angles of installation of the front wheels is broken (have the wheel alignment adjusted by a specialist workshop).
6. Braking one of the wheels of the car (see «Brake system - check of technical condition»).
Vehicle pulling away from straight line when braking
1. Different pressure in the tires of the front wheels (see «Checking tire pressure»).
2. One of the brake mechanisms is faulty (see «Brake system - check of technical condition»).
3. Pinched hose or pipeline of one of the brake mechanisms (see «Brake system - check of technical condition»).
4. Different degree of wear of parts of the brake mechanisms of one of the axles of the car (see «Brake system - check of technical condition»).
Uneven tire wear
1. Violated wheel alignment (have the wheel alignment adjusted by a specialist workshop).
2. Damage to suspension parts (see «Front suspension - check of technical condition», «Rear suspension - check of technical condition»).
3. Breakage of one of the springs of the front or rear suspension (see «Front suspension - check of technical condition», «Rear suspension - check of technical condition»)
4. One or more wheels out of balance (have the wheels balanced in a specialist workshop).
5. The vehicle is overloaded or unevenly loaded.
Decreased power steering fluid level
1. Damage to the hoses of the hydraulic booster system (see «Steering - condition check»),
2. Damage to the oil seal of the power steering pump (see «Power steering pump - replacement»).
3. Malfunction of the steering mechanism (see «Steering gear - removal and installation»).
Excessive steering play
1. Wheel bearing wear (see «Rims, tires and hubs - checking the technical condition»).
2. Failure of steering rods and / or their tips (see «Steering - condition check»).
3. Play in the steering mechanism (see «Steering - condition check»).
4. Wear of steering column parts (see «Steering - condition check»).
Decreased brake fluid level
1. Fault (leakage) wheel brake cylinders (see «Brake system - check of technical condition»).
2. Damage to tubes or hoses of the brake system (see «Brake system - check of technical condition»).
Creak (grinding) when braking
Brake pad wear (see «Brake system - check of technical condition»).
Vibration when braking
Warping of brake discs (see «Brake system - check of technical condition»).
Individual headlights or taillights do not turn on
1. Bulb filament burnt out (see «Lighting, light and sound signaling»).
2. The contact of the lamp in the cartridge is oxidized (see «Lighting, light and sound signaling»).
3. Damaged wires or oxidized tips in their connections (see «Electrical equipment - checking the technical condition»).
All lamps of one circuit do not turn on
1. Faulty fuse or relay of the corresponding circuit (see «Mounting Blocks - Replacing Fuses and Relays»).
2. Malfunction of steering column switches (see «Paddle switches - check and replace»).
3. The filaments of all the lamps in the circuit burned out (see «Lighting, light and sound signaling»).
4. Contacts of lamps in cartridges are oxidized (see «Lighting, light and sound signaling»).
5. Damaged wires or oxidized tips in their connections (see «Electrical equipment - checking the technical condition»).
Individual headlight or taillight bulbs are lit at full blaze
1. Poor contact or damage to the wire connecting the lamp (flashlight) With «weight» (see «Electrical equipment - checking the technical condition»).
2. Dimming the lamp bulb (see «Lighting, light and sound signaling»).
The control lamp of inclusion of indexes of turn blinks with the double frequency
The filament of one of the turn signal bulbs burned out (see «Lighting, light and sound signaling»).
Windshield wipers not working
1. Faulty fuses or relays (see «Mounting Blocks - Replacing Fuses and Relays»).
2. Malfunction of the steering column switch (see «Paddle switches - check and replace»).
3. Faulty wiper gear motor (see «Windshield wiper - checking the technical condition and diagnosing faults»).
4. Faulty wiring (see «Checking and repairing electrical circuits»).
Power side mirrors not working
1. Faulty fuse or relay (see «Mounting Blocks - Replacing Fuses and Relays»),
2. Faulty side mirror electric control unit (see «Power mirror control unit - check and replace»).
3. Faulty side mirrors (see «Side rear-view mirror - check and replace»).
4. Faulty wiring (see «Checking and repairing electrical circuits»).
Side door power windows not working
1. Faulty fuse or relay (see «Mounting Blocks - Replacing Fuses and Relays»).
2. Faulty power window control unit or key (see «Power window control unit - check and replace», cm. «Passenger door power window controls - check and replace»).
3. Faulty power window gear motors (see «Diagnosis of malfunctions of electric windows»).
4. Faulty wiring (see «Checking and repairing electrical circuits»).
Car door won't unlock
1. Frozen water in the lock cylinder (at ambient temperature below 0°C). Treat locks with penetrating lubricant.
2. The lock cylinder is dirty (see «Switch (larva) front door lock replacement»).
3. The cylinder mechanism of the lock is damaged (see «Switch (larva) front door lock replacement»).
Doors do not stay closed
Jamming of the moving parts of the lock due to dirt or lack of lubrication (see «Lubrication of hinges and locks», «Door lock - replacement and adjustment»).
Hood latch won't unlock
1. Broken cable drive lock (see «Hood lock cable - replacement»).
2. Faulty hood latch (see «Hood lock - replacement and adjustment»).
Tailgate won't open
Faulty tailgate lock (see «Tailgate lock - replacement and adjustment»).
Fuel filler cap won't open
Damaged or improperly adjusted sunroof cable.
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