Ford vehicles also use a set of diagnostic trouble codes (DTCs) to indicate potential issues with different systems in the car.

As of my last update in September 2021, Ford vehicles also use a set of diagnostic trouble codes (DTCs) to indicate potential issues with different systems in the car. As with other manufacturers, the specific codes can vary based on the Ford model, year, and the type of diagnostic system used. Here are some common Ford diagnostic trouble codes:

1. P0171 - System Too Lean (Bank 1)
2. P0174 - System Too Lean (Bank 2)
3. P0300 - Random/Multiple Cylinder Misfire Detected
4. P0301 - Cylinder 1 Misfire Detected
5. P0302 - Cylinder 2 Misfire Detected
6. P0303 - Cylinder 3 Misfire Detected
7. P0304 - Cylinder 4 Misfire Detected
8. P0401 - Exhaust Gas Recirculation (EGR) Flow Insufficient 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. P0500 - Vehicle Speed Sensor Malfunction
14. P1131 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean (Bank 1)
15. P1132 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich (Bank 1)
16. P1130 - Lack of Downstream Heated Oxygen Sensor Switch - Adaptive Fuel Limit - Bank 1
17. P1151 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean (Bank 2)
18. P1152 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich (Bank 2)
19. P1150 - Lack of Downstream Heated Oxygen Sensor Switch - Adaptive Fuel Limit - Bank 2
20. P1237 - Fuel Pump Secondary Circuit Malfunction
21. P1408 - EGR Flow Out of Self-Test Range
22. P1443 - Evaporative Emission Control System Control Valve
23. P1518 - Intake Manifold Runner Control Fault - Stuck Open
24. P1519 - Intake Manifold Runner Control Fault - Stuck Closed
25. P1633 - Keep Alive Power Voltage Too Low
26. P1635 - Tire/Axle Out of Acceptable Range
27. P1744 - Torque Converter Clutch System Performance or Stuck in Off Position
28. P1780 - Transmission Control Switch Out of Self-Test Range
29. P2004 - Intake Manifold Runner Control Stuck Open (Bank 1)
30. P2006 - Intake Manifold Runner Control Stuck Closed (Bank 1)

If you experience any of these diagnostic codes on your Ford vehicle, it is recommended to have a qualified mechanic or Ford dealership diagnose and address the specific issue. Utilizing 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.

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