Is it My Car's Fault?
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✓ 6,966+ owner reports
✓ 4,500+ linked symptom reports
✓ 37 verified symptom hubs
✓ Real repair statistics
MyCarFault is an independent car fault, OBD code and repair guide database built from real, structured vehicle problem reports — not rewritten manufacturer content.
🔥 Trending searches
🩺 Browse by Symptom
All symptoms →
CVT shudder at 35–45 mph
253 reports
Brake pads worn — squealing noise
238 reports
Wheel bearing humming noise while driving
237 reports
Engine oil leak from valve cover
236 reports
Battery draining overnight
234 reports
Exhaust rattle noise from underneath
233 reports
Coolant leak from engine area
231 reports
AC not blowing cold air
226 reports
Fuel economy dropped — poor MPG
197 reports
Alternator warning light — battery not charging
232 reports
Car won't start — clicking sound only
231 reports
Catalytic converter — P0420 code
225 reports
🚗 Find Faults for Your Car
Select your vehicle to see common faults and fixes
Covering 37+ vehicle makes — real reports, not guesses
6,966+
Real Owner Reports
Genuine fault cases submitted by actual drivers — not manufacturer copy
37+
Verified Symptoms
Dedicated diagnostic hubs covering the most common failures
101+
Repair Guides
Step-by-step instructions written from real, confirmed repairs
37+
Vehicle Coverage
282+ models tracked across every make
$1,241
Avg Repair Cost
72%
Avg Success Rate
37
Vehicles Covered
37
Symptoms
148
Fault Codes
101
Repair Guides
6,966
Owner Reports
📈 Most Reported Symptoms
All symptoms →CVT shudder at 35–45 mph
253 reports
16 makes
58 models
● Low severity
Brake pads worn — squealing noise
238 reports
16 makes
54 models
● Low severity
Wheel bearing humming noise while driving
237 reports
16 makes
57 models
● Low severity
Engine oil leak from valve cover
236 reports
15 makes
56 models
● Low severity
Battery draining overnight
234 reports
16 makes
59 models
● Low severity
Exhaust rattle noise from underneath
233 reports
16 makes
58 models
● Low severity
🟢 Popular Faults
View All →
🟢 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
🆕 Latest Verified Fault Reports
View All →👁 Most Viewed Fault Reports
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🟢 SOLVED 0%
Oil pressure warning light on — do not drive
🟢 SOLVED 0%
Grinding noise when braking — brake pad wear indicator
⚪ UNSOLVED
Car overheating — temperature gauge in red zone causes
🟢 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
📖 Popular Repair Guides
All guides →Pressure Testing the Cooling System for Leaks
👁 44
How to bleed brakes - all four methods explained
👁 35
How to replace front brake pads and discs
👁 33
How to Adjust Points Ignition — Gap, Dwell and Timing
👁 32
Testing Fuel Pressure on K-Jetronic (CIS) Systems
👁 31
Draining and Refilling the Cooling System on a Classic Car
👁 30
⚠️ Wrong Diagnosis?
Save money — know what NOT to replaceMost 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
P0174 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
🕐 Recently Added
View All →
⚪ UNSOLVED Nissan Pathfinder R52 3.5 V6 High Mileage Guide
Nissan
👁 9
⚪ UNSOLVED SEAT Ibiza Mk5 1.0 MPI 80PS Timing Chain Service
Seat
👁 6
⚪ UNSOLVED Skoda Kamiq 1.5 TSI EVO 150 High Mileage Guide
Skoda
👁 8
⚪ UNSOLVED Opel Vauxhall Crossland 1.5 BlueHDi High Mileage
Opel
👁 7
⚪ UNSOLVED Dacia Sandero Mk3 Streetway 1.0 SCe 65 Economy Check
Dacia
👁 9
⚪ UNSOLVED Jeep Cherokee KL 2.0 Multijet High Mileage Guide
Jeep
👁 5
⚪ UNSOLVED Fiat Tipo Mk2 1.4 T-Jet Petrol Timing Belt Service
Fiat
👁 5
⚪ UNSOLVED Mitsubishi ASX Mk2 XD 2.0 MIVEC High Mileage Check
Mitsubishi
👁 7
🔍 Most Common OBD-II Fault Codes
Search by code →P0420
Catalyst System Efficiency Below Threshold B1
231 reports
P0300
Random/Multiple Cylinder Misfire
227 reports
P0171
System Too Lean Bank 1
225 reports
P0011
Intake Camshaft Timing Over-Advanced Bank 1
4 reports
P0016
Crankshaft Camshaft Correlation Bank 1 A
3 reports
P0299
Turbocharger Underboost
3 reports
P0401
EGR Flow Insufficient
3 reports
P0700
Transmission Control System Malfunction
2 reports
P0325
Knock Sensor Circuit Bank 1
2 reports
P0128
Coolant Thermostat Below Regulating Temperature
2 reports
P0505
Idle Air Control System
1 report
P0304
Cylinder 4 Misfire
1 report
🗂️ Top Symptoms by Category
⚙️ Transmission
CVT shudder at 35–45 mph
Automatic transmission slipping between gears
Automatic transmission shudder on light throttle
🛑 Brakes
Brake pads worn — squealing noise
ABS warning light on
Brake pedal vibration above 60 mph
Brake noise after brake pad replacement
Brake grinding noise when stopping
🔩 Suspension
Wheel bearing humming noise while driving
Clunking from front suspension over bumps
Power steering heavy and whining
Air suspension compressor failure
Steering wheel vibration at highway speed
🔧 Engine
Engine oil leak from valve cover
Car won't start — clicking sound only
P0300 — random misfire causing rough idle
Check engine light — P0171 lean code
Timing chain rattle on cold start
💨 Exhaust
Exhaust rattle noise from underneath
Catalytic converter — P0420 code
DPF warning light — diesel engine
🌡️ Cooling
Coolant leak from engine area
Engine overheating — temperature gauge reads high
Coolant leak with sweet smell
Engine overheating in slow traffic
❄️ HVAC
AC not blowing cold air
🛡️ Why Trust MyCarFault
Real Owner Reports
6,966+ fault cases reported by actual drivers — not manufacturer marketing copy.
Real Repair Records
5,044+ confirmed repair attempts, tracking what was actually replaced or fixed.
Real Statistics
7+ fix confirmations feed every solved-rate percentage on this site — calculated, not guessed.
Verified Solutions
5,007+ cases marked solved only after a driver confirms the fix actually worked.
Community Contribution
Every report, vote and fix confirmation comes from drivers like you — the database grows with every visit.
📋 What's Wrong With Your Car?
Real owner reports by model — before you pay for a diagnosis
💰 repair cost
Risk 6/10
Tesla Model 3 Repair Costs: Battery, Drive Unit & More
💰 Est. £100–£8,000
🔩 engines
Risk 9/10
BMW N47 Engine: Complete Failure Guide for Buyers and Owners
💰 Est. £1,500–£8,000
⭐ reliability
Risk 3/10
Reliability Score by Brand 2024: Real Fault Rate Data
🔩 engines
Risk 5/10
VW EA888 Engine Problems: Oil Consumption & Timing
💰 Est. £300–£3,500
⚙️ transmission
Risk 6/10
CVT Transmission Problems: Symptoms, Causes & Costs
💰 Est. £800–£5,000
🔧 common problems
Risk 4/10
Tesla Model Y Common Problems: Build Quality, Suspension & Range
💰 Est. £100–£2,500
🔧 common problems
Risk 5/10
Tesla Model 3 Common Problems: What Owners Actually Report
💰 Est. £150–£3,500
🔩 engines
Risk 2/10
Toyota 1.8 Hybrid Engine Reliability: Long-Term Owner Reports
💰 Est. £100–£2,000
⭐ reliability
Risk 3/10
Most Reliable Used SUVs: Owner Data & Fault Rates
🔧 common problems
Risk 5/10
Skoda Octavia Common Problems: Mk2, Mk3 & Mk4 Issues
💰 Est. £200–£2,500
🔩 engines
Risk 5/10
VW 2.0 TDI Engine Problems: EA189 & EA288 Guide
💰 Est. £200–£2,000
🔩 engines
Risk 8/10
Mercedes OM651 Engine: Swirl Flap Failure, Timing & Owner Guide
💰 Est. £400–£6,000
⭐ reliability
Risk 4/10
Most Reliable Diesel Engines: Ranked by Fault Rate
⚙️ transmission
Risk 8/10
Ford Focus PowerShift 6DCT Problems: The Complete Owner Guide
💰 Est. £400–£3,500
🔧 common problems
Risk 5/10
Nissan Qashqai Common Problems: J10, J11 & J12 Issues
💰 Est. £300–£3,000
💰 repair cost
DSG Mechatronic Replacement Cost: DQ200 & DQ250
💰 Est. £600–£2,800
🔩 engines
Risk 7/10
Mercedes OM651 Engine Problems: Swirl Flaps, Timing & More
💰 Est. £400–£4,000
📍 high mileage
Risk 4/10
Tesla Battery Degradation at High Mileage: Real Data
💰 Est. £0–£8,000
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