April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Definitions

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC ⁽¹⁾

Definition

Camshaft Position "A" Actuator Circuit (Bank 1)

Camshaft Position "A" - Timing Over-Advanced Or System Performance (Bank 1 )

Camshaft Position "A" - Timing Over-Retarded (Bank 1)

Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)

Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)

Camshaft Position "A" Actuator Circuit (Bank 2)

Camshaft Position "A" - Timing Over-Advanced Or System Performance (Bank 2)

Camshaft Position "A" - Timing Over-Retarded (Bank 2)

Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 1)

Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 1)

Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)

Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2)

Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 1)

Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 1)

Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 2)

Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 2)

Mass Or Volume Airflow Circuit

Mass Or Volume Airflow Circuit Range/Performance Fault

Mass Or Volume Airflow Circuit Low Input

Mass Or Volume Airflow Circuit High Input

Intake Air Temperature Sensor Circuit

Intake Air Temperature Circuit Low Input

Intake Air Temperature Circuit High Input

Engine Coolant Temperature Circuit

Engine Coolant Temperature (ECT) Circuit Range/Performance Fault

Engine Coolant Temperature Circuit Low Input

Engine Coolant Temperature Circuit High Input

Throttle Pedal Position Sensor/Switch "A" Circuit Malfunction

Throttle Pedal Position Sensor/Switch "A" Circuit Range/Performance Fault

Throttle/Pedal Position Sensor/Switch "A" Circuit Low Input

Throttle/Pedal Position Sensor/Switch "A" Circuit High Input

Insufficient Coolant Temperature For Closed Loop Fuel Control

Coolant Thermostat (Coolant Temperature Below Thermostat Regulation Temperature)

Oxygen Sensor Circuit (Bank 1 Sensor 1)

Oxygen Sensor Circuit Slow Response (Bank 1 & 2 Sensor No. 1)

Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2)

Oxygen Sensor Circuit (Bank 2 Sensor 1)

Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 1)

Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 1)

Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2)

System Too Lean (Bank No. 1)

System Too Rich (Bank No. 1)

System Too Lean (Bank No. 2)

System Too Rich (Bank No. 2)

Throttle/Pedal Position Sensor/Switch "B" Circuit

Throttle/Pedal Position Sensor/Switch "B" Circuit Low Input

Throttle/Pedal Position Sensor/Switch "B" Circuit High Input

Fuel Pump Relay Primary Circuit

P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 OR P0308

Cylinder Misfire Detected

Knock Sensor 1 Circuit (Bank 1)

Knock Sensor 2 Circuit (Bank 2)

Crankshaft Position (CKP) Sensor "A" Circuit Malfunction

Crankshaft Position Sensor "A" Circuit Intermittent

Camshaft Position (CMP) Sensor "A"Circuit (Bank 1 Or Single Sensor)

Camshaft Position Sensor "A" Circuit Range/Performance (Bank 1 Or Single Sensor)

Camshaft Position Sensor "A" Circuit (Bank 2)

Camshaft Position Sensor "A" Circuit Range/Performance (Bank 2)

Igniter Coil "A" Primary/Secondary Circuit

Igniter Coil "B" Primary/Secondary Circuit

Igniter Coil "C" Primary/Secondary Circuit

Igniter Coil "D" Primary/Secondary Circuit

Igniter Coil "E" Primary/Secondary Circuit

Igniter Coil "F" Primary/Secondary Circuit

Igniter Coil "G" Primary/Secondary Circuit

Igniter Coil "H" Primary/Secondary Circuit

Catalyst System Efficiency Below Threshold (Bank No. 1 & 2)

Incorrect EVAP Purge Flow

Evaporative Emission Control System Leak Detected (Small Leak)

EVAP System Vent Control Fault

EVAP Pressure Sensor/Switch Range/Performance

EVAP Pressure Sensor/Switch Low Input

EVAP Pressure Sensor/Switch High Input

Evaporative Emission Control System Leak Detected (Very Small Leak)

Vehicle Speed Sensor (VSS) "A" Malfunction

Vehicle Speed Sensor (VSS) "A" Intermittent/Erratic/High

Brake Switch "A" /"B" Correlation

Idle Air Control System Malfunction

Incorrect Immobilizer Key

System Voltage

Internal Control Module Random Access Memory (RAM) Error

ECM/PCM Processor

Control Module Performance

Starter Relay Circuit High

Actuator Supply Voltage Circuit/Open

Transmission Range Sensor Circuit Malfunction (PRNDL Input)

P09XX

⁽²⁾

Camshaft Position Sensor "A" (Bank Sensor 1)

Camshaft Position Sensor "A" (Bank Sensor 1)

Body ECU Malfunction

P17XX

⁽²⁾

Throttle Actuator Control Motor Circuit Low

Throttle Actuator Control Motor Circuit High

Throttle Actuator Control System Stuck Open

Throttle Actuator Control System Stuck Closed

Throttle Actuator Control Motor Current Range/Performance

Throttle Actuator Control Throttle Body Range/Performance

Throttle/Pedal Position Sensor/Switch "D" Circuit

Throttle/Pedal Position Sensor/Switch "D" Circuit Range/Performance

Throttle/Pedal Position Sensor/Switch "D" Circuit Low Input

Throttle/Pedal Position Sensor/Switch "D" Circuit High Input

Throttle/Pedal Position Sensor/Switch "E" Circuit

Throttle/Pedal Position Sensor/Switch "E" Circuit Low Input

Throttle/Pedal Position Sensor/Switch "E" Circuit High Input

Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correction

Throttle/Pedal Position Sensor/Switch "D" /"E" Voltage Correlation

Oxygen Sensor Signal Lean (Bank 1 Sensor 1)

Oxygen Sensor Signal Rich (Bank 1 Sensor 1)

Oxygen Sensor Signal Lean (Bank 2 Sensor 1)

Oxygen Sensor Signal Rich (Bank 2 Sensor 1)

Immobilizer System Malfunction

⁽¹⁾	Some codes are two-trip detection logic code(s). For more information, see DETECTION LOGIC under INTRODUCTION.

⁽²⁾	These codes only apply to electronically controlled transmissions. For testing procedures, see appropriate DIAGNOSTIC TROUBLE CODE CHART in DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.

⁽³⁾	MIL will not illuminate. For testing procedures, see appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.