P0300: Random/Multiple Cylinder Misfire Detected

Oil Consumption and Fouled Spark Plugs on 3.7L V6

Intake Valve Carbon Buildup

Ignition Coil Failure

EGR Valve/Cooler Failure

Diesel Injector Failure

4.0T Carbon Deposit Accumulation

EA888 Carbon Buildup on Intake Valves

4.2L V8 Carbon Buildup and High-Rev Issues

Electronic Water Pump Failure (2.0T)

B5 S4 2.7T Timing Chain Guide Failure

Severe Carbon Buildup on Intake Valves (Direct Injection Engines)

Water Pump and Thermostat Housing Coolant Leaks

PCV Valve Failure (Rough Idle and Oil Consumption)

Severe Carbon Buildup on Intake Valves (Direct Injection)

Carbon Buildup on Intake Valves (4.0T Twin-Turbo V8)

Carbon Buildup on Intake Valves (Direct Injection)

4.0T Carbon Buildup on Intake Valves

4.2L V8 Carbon Buildup on Intake Valves

2.7T Ignition Coil Pack Failure Causing Misfires and Flashing Check Engine Light

Coil Pack Failure and Ignition Misfires on 1.8T Engines

Direct Injection Carbon Buildup on Intake Valves

Severe Carbon Buildup Causing Valve Damage (3.0T TFSI)

Excessive Oil Consumption (2.0 TFSI Engine)

Severe Carbon Buildup on Intake Valves (Direct Injection)

Water Pump Failure (60k Mile Lifespan)

Severe Carbon Buildup on Intake Valves (3.0T)

Carbon Buildup on Intake Valves (Pre-Dual Injection EA888 Gen 3)

Water Pump and Thermostat Failure

Severe Carbon Buildup on Intake Valves

Carbon Buildup on Intake Valves (4.2 V8 FSI and 5.2 V10 FSI)

Severe Carbon Buildup on Intake Valves (2.5T 5-Cylinder)

Carbon Buildup on Intake Valves (2.9T Twin-Turbo V6)

Severe Carbon Buildup on Intake Valves (4.0T V8)

B6/B7 4.2L V8 Timing Chain Tensioner Failure

Direct Injection Carbon Buildup (Intake Valves)

Turbocharger Oil Strainer Failure (4.0T V8) - CRITICAL

Intake Valve Carbon Buildup (Direct Injection)

Carbon Buildup on Intake Valves (2.0 TFSI Direct Injection)

Intake Valve Carbon Buildup

S65 V8 Rod Bearing Premature Failure

N63 Twin-Turbo V8 Excessive Oil Consumption

N63 Hot-Vee Engine Excessive Oil Consumption

N63 Valve Stem Seal Degradation and Oil Burning

N63/S63 Twin-Turbo V8 Excessive Oil Consumption

Valve Cover Gasket Oil Leak

Intake Valve Carbon Buildup

N63 Valve Stem Seal Degradation and Oil Burning

G80 S58 Engine Carbon Buildup on Intake Valves

Valve Cover Gasket Oil Leak

Valve Cover Gasket Leak and PCV Failure

S58 Intake Valve Carbon Buildup

S58 Intake Valve Carbon Buildup

SMG III Hydraulic Pump Failure - E60 M5

S63/S63TU Valve Stem Seal Failure & Oil Consumption

Fuel Injector Failure - 428i/430i/435i/440i F32/F33/F36

Electric Water Pump Failure (N52, N20 Engines)

N63 Valvetronic Motor Failure - F01/F02 750i/750Li

Electric Water Pump Failure - E85 (N52) & E89 Z4

S63 V8 Rod Bearing Premature Wear & Failure - E70/F85 X5 M

B58 Coolant System Failures (xDrive40i)

S55 High-Pressure Fuel Injector Failure - F82/F83 M4

S63/S63TU Ignition Coil Premature Failure

S63 Rod Bearing Failure (X6 M)

S85 V10 Rod Bearing Failure (Catastrophic Engine Destruction)

Rod Bearing Failure (S65 V8) - CRITICAL

CCV/Oil Separator Failure Causing Vacuum Leaks, Oil Consumption, and Cold-Weather Hydrolock Risk

Electric Water Pump Failure (All Engines)

Electric Water Pump Failure (N52, N55, N63 Engines)

Carbon Buildup on Intake Valves (Direct Injection Engines)

S85 V10 Rod Bearing Premature Failure (CATASTROPHIC) - E60 M5

S63TU4 Rod Bearing Wear (M8/M8 Competition)

Electric Water Pump Failure

Direct Fuel Injector Failure (S55)

S63 Twin-Turbo V8 Rod Bearing Concerns (F06/F12/F13 M6)

V12 Nikasil Cylinder Bore Wear (M70/M73)

Electric Water Pump Failure (All 1 Series E82/E88)

S55 Rod Bearing Premature Wear - F82/F83 M4

N63TU3 Valve Stem Seal Failure & Oil Consumption (M850i)

Electric Water Pump Failure (All Engines)

N55 Rod Bearing Premature Wear - F87 M2

Valve Cover Gasket Oil Leaks (M54, N52 Engines)

S63 Twin Turbo Wastegate Rattle - E70/F85 X5 M

Rod Bearing Wear (S54 Engine)

Carbon Buildup on Intake Valves (Direct Injection Engines)

Ignition Coil Pack Failure Causing Misfires and Check Engine Light on M52TU/M54 Engines

4.6L Northstar V8 Head Gasket Failure and Bolt Pull-Out

GM 6.2L V8 Engine Recall for Connecting Rod Bearing Failure

Northstar Head Gasket Failure and Head Bolt Pull-Out

Opti-Spark Distributor Water Intrusion and Failure

LT4 Supercharged V8 Premature Engine Failure

Northstar 4.6L Head Gasket Blown from Block Thread Failure

3.6L V6 Timing Chain Stretch and Premature Failure

Northstar 4.6L Head Gasket Failure

3.6L V6 Timing Chain Stretch - SRX

Northstar 4.6L V8 Head Bolt/Head Gasket Failure

Northstar 4.6L V8 Head Bolt/Head Gasket Failure

Excessive Oil Consumption - 6.2L EcoTec3 V8

Northstar 4.6L V8 Head Bolt/Head Gasket Failure

Northstar 4.6L Head Bolt Thread Pull/Head Gasket Failure

Northstar 4.6L Head Gasket Failure and Overheating

Northstar 4.6L Head Gasket Failure from Head Bolt Thread Stripping

6.2L L87 Connecting Rod/Bearing Failure Leading to Engine Seizure

LT1 5.7L Optispark Distributor Failure (1994-1996)

3.6L V6 Timing Chain Stretch (ATS V6 models)

4.6L Northstar V8 Head Gasket Failure (1993)

Northstar 4.6L Head Gasket Failure (Head Bolt Thread Pull)

AFM/DOD Lifter Failure - V8 Cylinder Deactivation System

LT1 Optispark Distributor Water Intrusion and Failure

Northstar 4.6L V8 Head Bolt/Head Gasket Failure

Active Fuel Management Lifter Failure

5.3L Vortec AFM Active Fuel Management Oil Consumption and Lifter Failure

Duramax Diesel Injector Failure

Ignition Coil and Spark Plug Failure

Timing Chain Tensioner Failure

Head Gasket Coolant Leak and Overheating on 3.4L V6

PCV Valve Cover Failure and Oil Leak (1.4T)

2.2L/2.4L Head Gasket Failure

Excessive Oil Consumption (2.5L Ecotec LCV/LKW)

4.3L Vortec Central Sequential Fuel Injection (CSFI) Failure

Injector Wiring Harness Chafing (Duramax)

5.7L Vortec Spider Injector Assembly Failure (CPI)

3.4L V6 Lower Intake Manifold Gasket Leak

Cylinder Head Valve Seat Failure and Misfire on 3.5L/3.7L Inline-Five

L99 AFM Lifter Failure and Camshaft Damage on 6.2L Automatic Cars

AFM/DOD Lifter Failure - V8 Cylinder Deactivation

Vortec 4.3L Intake Manifold Gasket Failure

2.2L OHV Head Gasket Failure

AFM/DFM Lifter Failure (5.3L/6.2L V8)

LT2 Engine Valve Lifter Tick and DFM Concerns

3.1L/3.4L Lower Intake Manifold Gasket Failure

Ecotec 2.4L Timing Chain and Guide Failure

AFM/DOD Lifter Failure - V8 Cylinder Deactivation

2.5L V6 Timing Chain Tensioner Failure

3.1L V6 Distributor Gear Wear Causing Timing Issues

HEMI 5.7L MDS Lifter and Camshaft Failure

Pentastar Cylinder Head Failure

2.7L V6 Engine Oil Sludge and Seizure

Chronic Overheating - Multiple Causes

Cooling System Failures (3.3L/3.8L V6)

Head Gasket Failure (Especially Turbo Models)

2.5L V6 Head Gasket Failure

3.6L Pentastar Engine Stalling and Head Gasket Failure

Turbocharger Failure (GT/Turbo Models)

3.5L V6 Head Gasket Failure and Overheating

2.5L V6 Head Gasket Failure

5.7L HEMI MDS Lifter Tick and Camshaft Failure

Timing Belt Tensioner and Water Pump Failure

Engine Oil Sludge Buildup (2.4L Non-Turbo)

PureTech 1.2 Timing Chain Stretch

Ignition Coil Failure

HEMI MDS Lifter Tick

HEMI MDS Lifter Tick

Pentastar V6 Rocker Arm/Lifter Tick

HEMI Lifter/MDS Tick

2.7L V6 Engine Oil Sludge and Seizure

5.9L Magnum Plenum Gasket Failure

2.7L V6 Engine Oil Sludge Buildup and Failure

Pentastar V6 Rocker Arm/Lifter Tick

Cooling System Failures (3.3L/3.8L V6)

2.4L DOHC Head Gasket Failure

Engine Overheating - Thermostat Housing Debris

6G72 Timing Belt and Balancer Belt Failure

Head Gasket Failure

2.2L/2.5L Head Gasket Failure

Head Gasket Failure

2.4L Electronic Throttle Body Failure

2.2L/2.5L Head Gasket Failure

Gen 1 V10 Head Gasket Failure

Rod Bearing Failure from Oil Starvation (Track Use)

Engine Oil Sludge Buildup (3.6L Pentastar V6)

Intake Manifold Gasket Leak (3.9L V6 and 4.7L V8)

2.3L EcoBoost Head Gasket Failure and Coolant Intrusion

2.0L Direct Injection Carbon Buildup on Intake Valves

1.5L EcoBoost Coolant Intrusion into Cylinders - Engine Block Porosity

Fuel Injector Failure and Rough Running (EcoBlue Diesel)

2.0L EcoBoost Coolant Intrusion - Open-Deck Block Failure

1.6L EcoBoost Engine Overheating and Coolant Loss - Recall 14S11

1.5L EcoBoost 3-Cylinder Coolant Loss and Engine Failure

EcoBoost Coolant Intrusion into Cylinders

4.0L SOHC Timing Chain Cassette and Tensioner Failure

Ignition Coil Failure and Misfires (2.5L/1.6L)

Engine Coolant Intrusion into Cylinders (Engine Block Cracking)

Distributor Internal Coil and Sensor Failure

Head Gasket Failure and Coolant Leakage

2.3L HSC Head Gasket Failure

3.8L V6 Head Gasket Failure

3.0L Vulcan V6 Head Gasket Failure

Distributor Failure (Mazda FS/KL Engine)

4.6L 2-Valve Spark Plug Ejection/Breakage

Ignition Coil Pack Failure

2.3L EcoBoost Coolant Intrusion and Misfire from Cracked Cylinder Head/Head Gasket Area

1.5L EcoBoost Coolant Intrusion Into Cylinders

Timing Chain Cassette and Guide Failure on 4.0L SOHC V6

6.0L Powerstroke Head Bolt Failure and Head Gasket Blowout

4.0L SOHC Timing Chain Guide Failure

2.0L SPI Head Gasket Failure

3.8L V6 Head Gasket Failure

5.4L 2-Valve Spark Plug Blow-Out From Cylinder Head

AFM/DOD Lifter Collapse and Valvetrain Failure

AFM/DFM Lifter Collapse and Failure

LML Duramax EGR Cooler and EGR Valve Failure

6.0L V8 Excessive Oil Consumption and AFM Lifter Wear

AFM Lifter Failure on V8 Vortec/EcoTec3 Engines

Direct Injection Carbon Buildup on Intake Valves

4.3L Central Port Injection (CPI) Spider Injector Failure

5.7L Vortec Spider Injector Assembly Failure

Active Fuel Management (AFM) Lifter Failure (V6)

5.7L Vortec Intake Manifold Gasket and CPI Issues

Ecotec 2.4L Timing Chain and Tensioner Failure

Active Fuel Management (AFM) Lifter Failure and Tick

1.5T Earth Dreams Direct Injection Carbon Buildup on Intake Valves

Fuel Injector Debris Causing Misfires and Catalyst Codes

11th Gen 2.0T Direct Injection Carbon Buildup and Idle Vibration

Ignition Coil Failure

Idle and Stalling Problems

Spark Plugs Backing Out - Coil Pack Melting and Engine Damage

VCM System Oil Consumption and Engine Damage

Timing Belt and Water Pump Neglect Leading to 3.2L V6 Engine Damage

EGR System Clogging (Lean Burn Engine)

Valve Cover Gasket and Spark Plug Tube Seal Oil Leaks Causing Misfires

Distributor Internal Coil and Igniter Failure (4th Gen)

Theta II Engine Seizure/Failure

Connecting Rod Bearing Failure (Theta II)

Theta II Engine Seizure Due to Connecting Rod Bearing Failure

Theta II Engine Failure / Connecting Rod Bearing Seizure

Excessive Oil Consumption - 2.4L GDI Engine

Nu Engine Bearing Failure and Seizure

GDI Intake Valve Carbon Buildup

Intake Manifold Gasket Leak

Fuel Injector Failure Causing Misfire, Rough Running, and Check Engine Light

Valve Cover Gasket Oil Leaks Onto Spark Plug Wells and Exhaust Manifold

Head Gasket Failure (Shared Excel Platform)

Theta II Engine Seizure / Recall

Head Gasket Failure (Mitsubishi G4DJ/G4EK)

Knock Sensor / Engine Protection Logic Triggering Reduced Power and Check-Engine Light on 2.0L Models

Excessive Oil Consumption (Theta II Engine)

VK56VD Timing Chain Stretch

Nikasil Cylinder Bore Wear on Early AJ-V8

HEMI Engine Tick/Lifter Noise

3.7L V6 Exhaust Manifold Crack / Valve Cover Oil Leaks

Ignition Coil Rail Failure Causing Misfire on 4.0L

Intake Valve Carbon Buildup (GDI Engines)

Fuel Injector Failure and Engine Stalling

3.8L Lambda V6 Timing Chain Stretch and Rattle

3.3L Lambda II GDI V6 Connecting Rod Bearing Failure

5.0L Tau V8 Timing Chain and GDI Injector Issues

Ignition Coil Pack Failure Causing Misfire

Ignition Coil and Plug Wire Failure Causing Misfire, Hesitation, and Check Engine Light

Head Gasket Failure (Mazda B-Series Engine)

Timing Belt Neglect Leading to Bent Valves and Sudden No-Start on 1.6L Engines

1.8L K-Series Head Gasket Failure

Head Gasket Failure on 2.5L KV6 Engine

Carbon Buildup on Intake Valves (2.0T)

Carbon Buildup on Intake Valves (2.0T)

V35A-FTS 3.4L Twin-Turbo V6 Main Bearing / Engine Failure Risk Covered by Toyota-Lexus Recall

Valve Cover Gasket Leaks Causing Oil Smell and Misfire Risk

Apex Seal Failure / Compression Loss

Crankshaft Position Sensor Failure (NB)

Carbon Buildup on Direct Injection Intake Valves

Carbon Buildup on Intake Valves (Skyactiv)

Timing Chain Guide and Tensioner Failure

Ignition Coil Failure and Misfires

Distributor Failure on V6 Models

Distributor Internal Coil and Hall Effect Sensor Failure

Skyactiv 2.0L Intake Valve Carbon Buildup

M272 Balance Shaft Gear Wear

M272 Balance Shaft Gear Wear and Failure

M272 Balance Shaft Sprocket Wear

M264 2.0L Engine Stalling or No-Start from Crankcase Ventilation / Cylinder Head Vent Valve Fault

N14/N18 Turbo Engine Timing Chain Catastrophic Failure

Direct Injection Carbon Buildup on Intake Valves

N12/N16 Timing Chain Tensioner Failure

Intake Valve Carbon Buildup from Direct Injection

Carbon Buildup on Intake Valves (Direct Injection) Causing Misfires/Power Loss

Turbocharger Oil Feed Line Leak and Carbon Buildup

B38/B48 Engine Timing Chain Stretch and Rattle

N14/N18 Timing Chain Tensioner Failure and Chain Stretch

VVEL Solenoid Failure (VK56VD Engine)

VQ35DE Timing Chain Stretch and Guide Wear

Excessive Oil Consumption (QR25DE)

Ignition Coil Failure

Distributor / Ignition System Failure Causing Sudden Stall or No-Start

2.5L Pre-Catalyst Breakdown Causing Excessive Oil Consumption and Engine Damage

Ignition Coil Failure (VQ35DE)

Timing Chain Rattle and Failure (QR25DE 4-Cylinder)

PureTech 1.2 Timing Chain Stretch

PureTech 1.2 Timing Chain Stretch

Cylinder Bore Scoring (Nikasil Wear)

Cylinder Bore Scoring

Direct Injection Intake Valve Carbon Buildup

Cylinder Bore Scoring

Timing Chain Tensioner and Guide Failure

Direct Injection Intake Valve Carbon Buildup

Cylinder Scoring on 981 GTS and GT4

6.7L Cummins Exhaust Brake Actuator and VGT Turbo Issues

HEMI Lifter/Camshaft Failure

MDS Lifter Failure and Hemi Tick (5.7L)

5.7L HEMI MDS Lifter Failure

Ignition Coil Pack Failure

Head Gasket Failure

EJ253 Head Gasket Failure (External Leak)

EJ25 Head Gasket Failure

EJ25 Head Gasket Failure

Spun Rod Bearing Failure (EJ257)

Head Gasket Issues

FA20 Valve Spring Recall - Engine Stalling Risk

EZ36 Timing Chain Stretch and Guide Wear

EJ257 Piston Ringland Failure

EZ30 3.0L H6 Head Gasket Leak

Head Gasket Failure (EA82 Engine)

Valve Spring Recall - Engine Stall Risk

EGR Valve and Intake Manifold Carbon Buildup

Water Pump Leak and Failure (2GR-FE)

1NZ-FXE Head Gasket Failure and EGR Cooler Issues

2.4L 2AZ-FE Excessive Oil Consumption

G16E-GTS Head Gasket Seepage Under Hard Use

3.4L 5VZ-FE Head Gasket Failure

22R-E Head Gasket Failure

2AZ-FE Excessive Oil Consumption from Piston/Ring Wear

FA20 Valve Spring Recall (Campaign E0G/17V-587)

Excessive Oil Consumption from 1ZZ-FE Piston Ring Wear

1GR-FE V6 Head Gasket Failure with External Coolant Leak at Rear of Cylinder Head

2.4L 2AZ-FE Head Gasket and Head Bolt Thread Failure

Head Gasket Failure

Head Gasket Failure (5E-FE)

Head Gasket Failure (Supercharged Models)

Intake Manifold Gasket Vacuum Leak Causing Cold-Start Rough Idle and Lean Codes

2AZ-FE Excessive Oil Consumption From Piston/Ring Wear

Direct Injection Carbon Buildup on Intake Valves

Direct Injection Carbon Buildup on Intake Valves

Direct Injection Carbon Buildup on Intake Valves

Ignition Coil Pack Failure (All Engines)

Intake Valve Carbon Buildup

2.5L 5-Cylinder Ignition Coil Pack Failure

Ignition Coil Failure

2.0 TSI Timing Chain Tensioner Failure (CCTA/CBFA)

EA211 1.5T Engine Ticking and Fuel Injector Noise

EA888 Gen 3 Intake Valve Carbon Buildup (GDI)

2.5L I5 Timing Chain Tensioner Failure

2.0T TSI Timing Chain Tensioner Failure

PCV Valve Diaphragm Failure

VR6 Timing Chain Tensioner Failure

2.0L Ignition Coil Pack Failure

Timing Belt and Water Pump Failure

PCV Valve/Diaphragm Failure

VR6 Cylinder Head Cracking

Direct Injection Carbon Buildup on Intake Valves

Ignition Coil Pack Cracking and Misfires

Ignition System and Distributor Failure

Ignition Coil Pack Failure (1.8T/2.0)

Rough Idle and Engine Hesitation

T6 Supercharger Intercooler Condensation and Hesitation

Distributor Cap and Rotor Failure