Problem finder
What is wrong with your car?
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Car losing power: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Engine shaking: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car jerks while driving: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Rough idle: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car hard to start: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car will not start: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Engine stalls: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car uses too much fuel: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Hesitation on acceleration: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car in limp mode: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Turbo lag or no boost: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Engine knocking: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Noise from engine: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car overheating: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Engine revs go up and down: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Check engine light on: Causes, First Checks and OBD2 Codes
A warning light means a control module detected a condition that needs checks. The light alone is a direction, not a final diagnosis.
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Car losing power: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Engine shaking: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car jerks while driving: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Rough idle: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car hard to start: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car will not start: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Engine stalls: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car uses too much fuel: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Hesitation on acceleration: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car in limp mode: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Turbo lag or no boost: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Engine knocking: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Noise from engine: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Car overheating: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Engine revs go up and down: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Check engine light on: Causes, First Checks and OBD2 Codes
A warning light means a control module detected a condition that needs checks. The light alone is a direction, not a final diagnosis.
Check engine light flashing: Causes, First Checks and OBD2 Codes
A warning light means a control module detected a condition that needs checks. The light alone is a direction, not a final diagnosis.
Oil pressure light on: Causes, First Checks and OBD2 Codes
A warning light means a control module detected a condition that needs checks. The light alone is a direction, not a final diagnosis.
Battery light on: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
ABS light on: Causes, First Checks and OBD2 Codes
Brake, steering, vibration, and suspension symptoms are safety-related and should be checked before they become control problems.
Brake warning light: Causes, First Checks and OBD2 Codes
Brake, steering, vibration, and suspension symptoms are safety-related and should be checked before they become control problems.
Airbag light on: Causes, First Checks and OBD2 Codes
A warning light means a control module detected a condition that needs checks. The light alone is a direction, not a final diagnosis.
Tire pressure light on: Causes, First Checks and OBD2 Codes
A warning light means a control module detected a condition that needs checks. The light alone is a direction, not a final diagnosis.
Coolant warning light: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
DPF warning light: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Glow plug light flashing: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
White smoke from exhaust: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Black smoke from exhaust: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Blue smoke from exhaust: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Fuel smell in car: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Burning oil smell: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Exhaust smell in cabin: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Sweet coolant smell: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Transmission slipping: Causes, First Checks and OBD2 Codes
Shift problems can come from fluid level, clutch packs, solenoids, sensors, mounts, linkage, or software adaptation.
Hard gear shifts: Causes, First Checks and OBD2 Codes
Shift problems can come from fluid level, clutch packs, solenoids, sensors, mounts, linkage, or software adaptation.
Gear will not engage: Causes, First Checks and OBD2 Codes
Shift problems can come from fluid level, clutch packs, solenoids, sensors, mounts, linkage, or software adaptation.
Delay when selecting drive: Causes, First Checks and OBD2 Codes
Shift problems can come from fluid level, clutch packs, solenoids, sensors, mounts, linkage, or software adaptation.
Clutch slipping: Causes, First Checks and OBD2 Codes
Shift problems can come from fluid level, clutch packs, solenoids, sensors, mounts, linkage, or software adaptation.
Noise from gearbox: Causes, First Checks and OBD2 Codes
Shift problems can come from fluid level, clutch packs, solenoids, sensors, mounts, linkage, or software adaptation.
Brake noise: Causes, First Checks and OBD2 Codes
Brake, steering, vibration, and suspension symptoms are safety-related and should be checked before they become control problems.
Steering wheel vibration: Causes, First Checks and OBD2 Codes
Brake, steering, vibration, and suspension symptoms are safety-related and should be checked before they become control problems.
Car pulls to one side: Causes, First Checks and OBD2 Codes
Brake, steering, vibration, and suspension symptoms are safety-related and should be checked before they become control problems.
Suspension knocking noise: Causes, First Checks and OBD2 Codes
Brake, steering, vibration, and suspension symptoms are safety-related and should be checked before they become control problems.
Wheel bearing noise: Causes, First Checks and OBD2 Codes
Brake, steering, vibration, and suspension symptoms are safety-related and should be checked before they become control problems.
Brake pedal soft: Causes, First Checks and OBD2 Codes
Brake, steering, vibration, and suspension symptoms are safety-related and should be checked before they become control problems.
Car does not crank: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
Battery drains overnight: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
Alternator not charging: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
Cooling fan keeps running: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
AC not cold: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
Power window not working: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
Central locking not working: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
Dashboard lights flicker: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
Diesel car has no power: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
DPF clogged symptoms: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
EGR valve problem: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
AdBlue warning: Causes, First Checks and OBD2 Codes
A warning light means a control module detected a condition that needs checks. The light alone is a direction, not a final diagnosis.
Turbo whistle noise: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
LPG car misfires: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Hybrid system warning: Causes, First Checks and OBD2 Codes
A warning light means a control module detected a condition that needs checks. The light alone is a direction, not a final diagnosis.
Electric car not charging: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
Electric car range dropped: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
Regenerative braking problem: Causes, First Checks and OBD2 Codes
Brake, steering, vibration, and suspension symptoms are safety-related and should be checked before they become control problems.
Coolant leak: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Oil leak: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Fuel leak: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Coolant level low: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Oil level low: Causes, First Checks and OBD2 Codes
A warning light means a control module detected a condition that needs checks. The light alone is a direction, not a final diagnosis.
Engine running hot: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Vibration only at idle: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Vibration at speed: Causes, First Checks and OBD2 Codes
Brake, steering, vibration, and suspension symptoms are safety-related and should be checked before they become control problems.
Noise on cold start: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Fuel smell after refueling: Causes, First Checks and OBD2 Codes
Smoke or strong smell can point to fuel, oil, coolant, exhaust, or overheating problems. Treat it as a safety issue first.
Engine cuts out while driving: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Engine will not rev: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Idle too high: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Idle too low: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Engine backfires: Causes, First Checks and OBD2 Codes
This usually points to air, fuel, ignition, compression, turbo, or sensor data being outside the range the engine needs.
Fuel gauge wrong: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.
Speedometer not working: Causes, First Checks and OBD2 Codes
Electrical symptoms usually come from battery voltage, charging, grounds, fuses, modules, wiring, or a weak actuator.