Similar to other car manufacturers, Chevrolet 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 Chevrolet model, year, and the type of diagnostic system used. Here are some common Chevrolet diagnostic trouble codes:
1. P0101 - Mass or Volume Air Flow Circuit Range/Performance Problem
2. P0171 - System Too Lean (Bank 1)
3. P0174 - System Too Lean (Bank 2)
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. P0401 - Exhaust Gas Recirculation (EGR) Flow Insufficient Detected
10. P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
11. P0430 - Catalyst System Efficiency Below Threshold (Bank 2)
12. P0442 - Evaporative Emission System Leak Detected (Small Leak)
13. P0455 - Evaporative Emission System Leak Detected (Gross Leak)
14. P0500 - Vehicle Speed Sensor Malfunction
15. P1101 - Intake Airflow System Performance
16. P1133 - HO2S Insufficient Switching (Bank 1 Sensor 1)
17. P1134 - HO2S Transition Time Ratio (Bank 1 Sensor 1)
18. P1153 - HO2S Insufficient Switching (Bank 2 Sensor 1)
19. P1154 - HO2S Transition Time Ratio (Bank 2 Sensor 1)
20. P1404 - Cold Start Emission Reduction Control System
21. P1441 - Evaporative Emission Control System Incorrect Purge Flow
22. P1516 - Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
23. P1518 - Throttle Actuator Control (TAC) Module Serial Data Circuit
24. P1521 - Transmission Range Switch Circuit Performance
25. P1811 - Maximum Adapt and Long Shift
26. P2135 - Throttle/Pedal Position Sensor/Switch "A" / "B" Voltage Correlation
27. P2138 - Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation
28. P228D - Fuel Pressure Regulator 1 Exceeded Control Limits
29. P2610 - ECM/PCM Internal Engine Off Timer Performance
30. U1000 - Class 2 Communication Malfunction
If you encounter any of these diagnostic codes on your Chevrolet vehicle, it is recommended to have a qualified mechanic or Chevrolet dealership diagnose and address the specific issue. Professional diagnostic equipment is vital for accurate readings and appropriate repairs. As with other manufacturers, the list of codes can change over time as new models and diagnostic systems are introduced.
