RAM code P1474 is an error code that indicates a problem with the Intake Air Diverter (IAD) Valve in the Airbox. This code is specifically triggered when the Powertrain Control Module (PCM) detects that the IAD Valve is not moving to the position that it is commanded to. When this code is triggered, the PCM will display the ‘Active Airbox Service Required-See Dealer’ message. The cause of RAM code P1474 can be traced back to several possible issues, including an open or high resistance in the IAD Command Circuit, a short to voltage in the IAD Command Circuit, an IAD Valve out of calibration, or a faulty IAD Valve or PCM.
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Causes and Solutions of RAM Code P1474
CauseSolution
| INTAKE AIR DIVERTER COMMAND CIRCUIT OPEN/HIGH RESISTANCE | Test the IAD Command Circuit for any open or high resistance. |
| INTAKE AIR DIVERTER COMMAND CIRCUIT SHORT TO VOLTAGE | Check the IAD Command Circuit for any short to voltage. |
| INTAKE AIR DIVERTER VALVE OUT OF CALIBRATION | Inspect the IAD Valve for proper calibration. |
| INTAKE AIR DIVERTER VALVE | Replace the IAD Valve if it is faulty. |
| POWERTRAIN CONTROL MODULE (PCM) | Replace the PCM if it is faulty. |
RAM code P1474 is a diagnostic trouble code that can be triggered when the Powertrain Control Module (PCM) detects a fault in the Intake Air Diverter (IAD) Valve. The PCM will display the ‘Active Airbox Service Required-See Dealer’ message when this code is activated. The IAD Valve is located in the Airbox and controls air intake. The causes of RAM code P1474 can range from an open or high resistance in the IAD Command Circuit to a short voltage in the IAD Command Circuit, to the IAD Valve being out of calibration, or a faulty IAD Valve or PCM. It is important to properly identify and address the underlying cause of this code to fix the issue and prevent further costly damage to the system. Fortunately, this code can be fixed with a few simple steps. The solutions to this code include testing the IAD Command Circuit for any open or high resistance, checking the IAD Command Circuit for any short to voltage, inspecting the IAD Valve for proper calibration, replacing the IAD Valve if it is faulty, and replacing the PCM if it is defective.
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Conclusion: Solving RAM Code P1474
RAM code P1474 is an error code that can be triggered in the Powertrain Control Module (PCM) when the Intake Air Diverter (IAD) Valve is not operating within its programmed parameters. The cause of RAM code P1474 can be traced back to several possible issues, including an open or high resistance in the IAD Command Circuit, a short to voltage in the IAD Command Circuit, an IAD Valve out of calibration, or a faulty IAD Valve or PCM. Fortunately, this code can be fixed with simple steps, such as testing the IAD Command Circuit, inspecting the IAD Valve, and replacing the IAD Valve or PCM if necessary. It is important to properly diagnose and address the underlying cause of RAM code P1474 to prevent further costly damage to the system.
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