OBD-II Code Lookup
Check engine light on? Find out what your code means, common causes, repair costs, and shop the parts you need to fix it.
437 codes in our database
Most Common Codes
The engine computer (PCM) detects an open circuit in the fuel shutoff valve 'A' control circuit, meaning it cannot properly control the fuel flow to the engine.
Critical
The engine's computer detects a high voltage condition in the control circuit for the fuel shutoff valve 'A'. This valve controls fuel flow to the engine.
Critical
The engine's computer detects a mismatch between the crankshaft and camshaft positions on Bank 1, Sensor A. This indicates a problem with engine timing.
Critical
Your engine's turbocharger or supercharger turbine is spinning too fast, beyond its safe operating limits.
Critical
The engine computer detects a voltage signal from the Fuel Rail Pressure Sensor 'B' circuit that is too high.
Critical
Your engine's computer detected that the fuel pressure in the fuel rail is too high.
Critical
Your engine computer has detected a large leak in the high-pressure fuel system.
Critical
Engine Coolant Temperature Too High
Critical
Fuel Delivery Error
Critical
Engine Oil Temperature Too High
Critical
The engine's computer has detected a problem with the circuit that controls the engine shutoff solenoid, which is responsible for cutting off fuel to stop the engine.
Critical
Engine Over Temperature Condition
Critical
Browse by System
Fuel System
Fuel pump, injectors, fuel pressure
Emissions
Catalytic converter, O2 sensors, EGR system
Transmission
Shift solenoids, torque converter
All Codes A-Z
What Are OBD-II Codes?
OBD-II (On-Board Diagnostics II) codes are standardized diagnostic trouble codes used by vehicles manufactured after 1996. When your check engine light comes on, your vehicle's computer stores a code that helps identify what system or component is having an issue.
These codes follow a standard format: a letter followed by four numbers. The first letter indicates the system:
- P - Powertrain (engine, transmission)
- B - Body (airbags, AC, seatbelts)
- C - Chassis (ABS, steering)
- U - Network (communication between modules)
The second character (0 or 1) indicates whether it's a generic (standardized) or manufacturer-specific code. The remaining three numbers identify the specific fault.
How to Read Your OBD Codes
You can read your vehicle's diagnostic codes using an OBD-II scanner, which plugs into the OBD port typically located under the dashboard near the steering column. Many auto parts stores will scan your codes for free. Once you have the code, use our lookup tool above to understand what it means and find the parts you need to fix it.
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