Is it My Car's Fault?
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🚗 Find Faults for Your Car
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Fix confirmations
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🟢 Popular Faults
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🟢 SOLVED 0%
Oil pressure warning light on — do not drive
🟢 SOLVED 0%
Grinding noise when braking — brake pad wear indicator
🟢 SOLVED 0%
Steering wheel vibration at speed — wheel balancing or tracking
🟢 SOLVED 0%
Engine management light on after fuel cap not tightened
🟢 SOLVED 0%
Battery warning light on while driving — alternator fault
🟢 SOLVED 0%
ABS warning light on — wheel speed sensor fault
🟢 SOLVED 0%
Diesel engine won t start when very cold — glow plug system
🟢 SOLVED 0%
White smoke from exhaust — coolant in combustion chamber
⚠️ Wrong Diagnosis?
Save money — know what NOT to replaceP0174 affects Bank 2 (passenger side on most V engines). Same causes as P0171 but check Bank 2 specific components: intake manifold gaskets on Bank 2 side, Bank 2 O2 sensor, Bank 2 injectors. On GM V6/V8, plastic intake manifold gaskets failing is extreme
on: P0174 System Too Lean Bank 2 — V6 and V8 Engines
1 driver say NOT the fix
P0128 almost always means thermostat is stuck open and engine never reaches proper operating temperature. Fix: Replace thermostat — cheap part ($15-40), moderate labor. Do NOT just clear the code — running cold causes increased fuel consumption, engine we
on: P0128 Coolant Thermostat Temperature Below Regulating Temperature
1 driver say NOT the fix
P0300 = random misfire across multiple cylinders. Fix order: 1) Replace all spark plugs — most common cause, cheap fix. 2) Swap ignition coils between cylinders to find faulty coil. 3) Smoke test for vacuum leaks. 4) Fuel injector cleaner in tank. 5) Chec
on: P0300 Random/Multiple Cylinder Misfire — Full Diagnosis Guide
1 driver say NOT the fix
P0442 = small evap leak. Start simple: 1) Tighten or replace gas cap — $10-20, fixes 30% of cases. 2) Inspect all rubber EVAP hoses for cracks. 3) Check charcoal canister for damage. 4) Test purge valve and vent valve. Professional smoke test needed for d
on: P0442 EVAP System Small Leak Detected — Diagnosis
1 driver say NOT the fix
Before buying a new cat: 1) Fix any misfires first — P0300/P030x codes damage the cat. 2) Check exhaust leaks before the converter. 3) Test downstream O2 sensor — a bad sensor is $50-150 vs $500+ for a new cat. 4) Try catalytic converter cleaner additive.
on: P0420 Catalyst System Efficiency Below Threshold Bank 1
1 driver say NOT the fix
Most common causes in order: 1) Vacuum leak — spray carb cleaner near intake joints, listen for RPM change. 2) Dirty MAF sensor — clean with MAF cleaner spray ($10), often fixes it immediately. 3) Weak fuel pump — check fuel pressure. 4) Stuck PCV valve.
on: P0171 System Too Lean Bank 1 — Step by Step Fix
1 driver say NOT the fix
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📋 What's Wrong With Your Car?
Real owner reports by model — before you pay for a diagnosis
🔧 common problems
Risk 6/10
BMW 3 Series Common Problems: All Generations
💰 Est. £300–£5,000
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Risk 5/10
BMW vs Mercedes Reliability: Which Brand Is More Reliable?
🔩 engines
Risk 9/10
BMW N47 Timing Chain: Why It Fails and What Prevention Costs
💰 Est. £1,500–£7,000
🔧 common problems
Risk 4/10
Tesla Model Y Common Problems: Build Quality, Suspension & Range
💰 Est. £100–£2,500
⚙️ transmission
Risk 7/10
DSG Transmission Problems: Mechatronic, Clutch & Shudder
💰 Est. £500–£4,500
🔩 engines
Risk 2/10
Toyota 1.8 Hybrid Engine Reliability: Long-Term Owner Reports
💰 Est. £100–£2,000
🔩 engines
Risk 8/10
BMW N47 Engine Problems: Timing Chain, EGR & Turbo
💰 Est. £1,500–£6,000
🔩 engines
Risk 5/10
VW EA888 Engine Problems: Oil Consumption & Timing
💰 Est. £300–£3,500
🔩 engines
Risk 7/10
Mercedes OM651 Engine Problems: Swirl Flaps, Timing & More
💰 Est. £400–£4,000
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