OBD2 Trouble Codes
Browse 543 diagnostic trouble codes — each with symptoms, causes, cost estimates, and repair guidance.
O2 Sensor Signal Biased/Stuck Lean - Bank 2 Sensor 1
Air/Fuel Ratio Imbalance Bank 1
O2 Sensor Signal Biased/Stuck Lean - Bank 1 Sensor 2
O2 Sensor Signal Biased/Stuck Rich - Bank 1 Sensor 2
Intake Air System Leak
Ignition Coil "A" Primary Control Circuit Low
Ignition Coil "A" Primary Control Circuit High
Ignition Coil "A" Secondary Circuit
Ignition Coil "B" Primary Control Circuit Low
Evaporative Emission System Leak Detection Pump Control Circuit
Evaporative Emission System Leak Detection Pump Control Circuit Low
Evaporative Emission System Leak Detection Pump Control Circuit High
Evaporative Emission System Leak Detection Pump Sense Circuit Range/Performance
Exhaust Gas Recirculation System Performance
Evaporative Emission System Switching Valve Control Circuit/Open
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance Bank 1
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low Bank 1
Secondary Air Injection System Switching Valve Stuck Open Bank 1
Secondary Air Injection System Switching Valve Stuck Closed Bank 1
Secondary Air Injection System Switching Valve Stuck Open Bank 2
Secondary Air Injection System Switching Valve Stuck Closed Bank 2
Secondary Air Injection System Pump Stuck On Bank 1
Secondary Air Injection System Pump Stuck Off Bank 1
Secondary Air Injection System Pump Stuck On Bank 2
Secondary Air Injection System Pump Stuck Off Bank 2
DPF Soot Accumulation
VTEC Oil Pressure Switch Circuit High (Rocker Arm)
Pressure Control Solenoid D Electrical
Pressure Control Solenoid E Stuck Off
Torque Converter Clutch Circuit Low
High Speed CAN Communication Bus
High Speed CAN Communication Bus (Performance)
High Speed CAN Communication Bus (+) Open
High Speed CAN Communication Bus (+) Low
Control Module Communication Bus "A" Off
Lost Communication With ECM/PCM
Lost Communication With TCM
Lost Communication with Transfer Case Control Module
Lost Communication with Gear Shift Control Module "A"
Lost Communication with Cruise Control Module
Lost Communication with Fuel Injector Control Module
Lost Communication with Glow Plug Control Module
Lost Communication with Throttle Actuator Control Module
Lost Communication with Alternative Fuel Control Module
Lost Communication with Fuel Pump Control Module
Lost Communication with Drive Motor Control Module "A"
Lost Communication with Battery Energy Control Module "A"
Lost Communication With Transfer Case Control Module
Lost Communication With Anti-Lock Brake System (ABS) Control Module
Lost Communication With Vehicle Dynamics Control Module
Lost Communication With Steering Angle Sensor Module
Lost Communication With Power Steering Control Module
Lost Communication With Body Control Module
Lost Communication With Body Control Module "A"
Lost Communication With Restraints Control Module (SRS/Airbag)
Lost Communication With Instrument Panel Cluster (IPC)
Lost Communication With HVAC Control Module
Lost Communication With Vehicle Security Control Module
Lost Communication With Radio / Audio Control Module
Lost Communication With Door Control Module "A"