Decode Your Check Engine Light
Search any OBD-II trouble code to find symptoms, causes, and repair costs instantly.
How It Works
1
Scan
Use an OBD-II scanner to read your vehicle's trouble codes
2
Search
Enter the code here to find detailed diagnostic information
3
Fix
Follow diagnosis steps or find a qualified mechanic
Most Common Codes
View all →P0011Moderate
Intake Camshaft Position Timing Over-Advanced (Bank 1)
P0100Moderate
Mass or Volume Air Flow Circuit Malfunction
P0128Low
Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
P0171Moderate
System Too Lean (Bank 1)
P0172Moderate
System Too Rich (Bank 1)
P0174Moderate
System Too Lean (Bank 2)
P0300Severe
Random/Multiple Cylinder Misfire Detected
P0301Severe
Cylinder 1 Misfire Detected
P0302Severe
Cylinder 2 Misfire Detected
P0335Critical
Crankshaft Position Sensor "A" Circuit Malfunction
P0340Severe
Camshaft Position Sensor Circuit Malfunction (Bank 1 or Single Sensor)
P0401Moderate
Exhaust Gas Recirculation Flow Insufficient Detected
P0420Moderate
Catalyst System Efficiency Below Threshold (Bank 1)
P0430Moderate
Catalyst System Efficiency Below Threshold (Bank 2)
P0440Moderate
Evaporative Emission Control System Malfunction
P0442Low
Evaporative Emission Control System Leak Detected (Small Leak)
P0455Moderate
Evaporative Emission Control System Leak Detected (Gross Leak)
B0001Critical
Driver Frontal Airbag Deployment Loop Circuit Open
B0023Critical
Driver Seatbelt Pretensioner Circuit Open
B0040Severe