Like other car manufacturers, Honda vehicles also use a set of diagnostic trouble codes (DTCs) to identify potential issues with various systems in the car. As with other manufacturers, the specific codes can vary based on the Honda model, year, and the type of diagnostic system used. Here are some common Honda diagnostic trouble codes:
1. P0101 - Mass or Volume Air Flow Circuit Range/Performance Problem
2. P0171 - System Too Lean (Bank 1)
3. P0172 - System Too Rich (Bank 1)
4. P0300 - Random/Multiple Cylinder Misfire Detected
5. P0301 - Cylinder 1 Misfire Detected
6. P0302 - Cylinder 2 Misfire Detected
7. P0303 - Cylinder 3 Misfire Detected
8. P0304 - Cylinder 4 Misfire Detected
9. P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
10. P0430 - Catalyst System Efficiency Below Threshold (Bank 2)
11. P0442 - Evaporative Emission System Leak Detected (Small Leak)
12. P0455 - Evaporative Emission System Leak Detected (Gross Leak)
13. P0505 - Idle Control System Malfunction
14. P1106 - Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Voltage High
15. P1107 - Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Voltage Low
16. P1122 - Throttle Position (TP) Sensor Circuit Intermittent Low Voltage
17. P1123 - Throttle Position (TP) Sensor Circuit Intermittent High Voltage
18. P1130 - Air/Fuel Ratio (A/F) Sensor Circuit Range/Performance Malfunction
19. P1131 - Air/Fuel Ratio (A/F) Sensor Circuit Range/Performance Malfunction (Bank 1 Sensor 1)
20. P1133 - Air/Fuel Ratio (A/F) Sensor Circuit Response Malfunction (Bank 1 Sensor 1)
21. P1259 - VTEC System Malfunction
22. P1456 - Evaporative Emissions Control System Leakage (Fuel Tank System)
23. P1491 - EGR Valve Lift Insufficient Detected
24. P1607 - Engine Control Module (ECM)/Powertrain Control Module (PCM) Internal Circuit Malfunction
25. P1739 - Automatic Transmission (A/T) 3rd Clutch Pressure Switch Circuit
26. P1753 - Automatic Transmission (A/T) Lock-Up Control Solenoid Valve Malfunction
27. P1758 - Automatic Transmission (A/T) Second Clutch Pressure Switch Circuit
28. P1768 - Automatic Transmission (A/T) Linear Solenoid Valve Malfunction
29. P1791 - Transmission Control Module (TCM) Clutch Pedal Position (CPP) Switch Stuck Closed
30. U0155 - Lost Communication with Instrument Panel Cluster (IPC) Control Module
If you encounter any of these diagnostic codes on your Honda vehicle, it is recommended to have a qualified mechanic or Honda dealership diagnose and address the specific issue. Using professional diagnostic equipment ensures accurate readings and appropriate repairs. Keep in mind that the list of codes can change over time as new models and diagnostic systems are introduced.
