Honda ECU Diagnostic Trouble Codes Diagnostic Trouble Code (DTC) System Indicated

0 Engine Control Module (ECM)
1 Heated Oxygen Sensor (HO2S)
3 Manifold Absolute Pressure (MAP Sensor)
4 Crankshaft Position (CKP Sensor)
6 Engine Coolant Temperature (ECT Sensor)
7 Throttle Position (TP Sensor)
8 Top Dead Center Position (TDC Sensor)
9 No. 1 Cylinder Position (CYP Sensor)
10 Intake Air Temperature (IAT Sensor)
13 Barometric Pressure (BARO Sensor)
14 Idle Air Control (IAC Valve)
15 Ignition Output Signal
16 Fuel Injector
17 Vehicle Speed Sensor (VSS)
20 Electrical Load Detector (ELD)
21 Variable Valve Timing & Valve Lift Electronic Control Solenoid Valve (VTEC Solenoid Valve)
22 Variable Valve Timing & Valve Lift Electronic Control Pressure Switch (VTEC Pressure Switch)
23 Knock Sensor (KS)
30 A/T FI Signal A
31 A/T FI Signal B
41 Heated Oxygen Sensor (HO2S) Heater
43 Fuel Supply System