P1680 – OBD-II DTC

OBD-II DTC P1680 – IDM_EN Circuit Failure

DTC P1680 meaning

DTC P1680 refers to a diagnostic trouble code indicating a failure in the IDM_EN (Injector Driver Module Enable) circuit. This code is specific to certain vehicles and is related to the communication between the Engine Control Module (ECM) and the Injector Driver Module (IDM). When this code is triggered, it suggests that the ECM is unable to properly enable the IDM, which can lead to issues with fuel injection and engine performance.

DTC P1680 symptoms

Common symptoms associated with DTC P1680 may include:

• Engine misfires or rough idling
• Decreased engine performance
• Difficulty starting the engine
• Increased fuel consumption
• Check Engine Light illuminated

DTC P1680 causes

Several factors can lead to the triggering of DTC P1680, including:

• Faulty Injector Driver Module
• Wiring issues or short circuits in the IDM circuit
• Defective Engine Control Module (ECM)
• Corroded or loose connectors
• Faulty sensors affecting the fuel injection system

DTC P1680 seriousness

DTC P1680 can be considered serious as it directly impacts the engine’s fuel injection system. If left unaddressed, it may lead to:

• Severe engine performance issues
• Increased emissions
• Potential engine damage over time
• Inability to pass emissions tests

How to diagnose DTC P1680

To diagnose DTC P1680, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC P1680.
2. Inspect the wiring and connectors related to the IDM for any visible damage or corrosion.
3. Check the Injector Driver Module for proper operation.
4. Test the Engine Control Module for faults or failures.
5. Perform a continuity test on the IDM circuit to ensure there are no breaks.
6. Clear the code and perform a road test to see if the code reappears.

How to fix DTC P1680 step-by-step instructions

To fix DTC P1680, follow these steps:

1. Inspect and repair any damaged wiring or connectors in the IDM circuit.
2. Replace the Injector Driver Module if it is found to be faulty.
3. Test and replace the Engine Control Module if necessary.
4. Ensure all ground connections are secure and free of corrosion.
5. Clear the DTC using an OBD-II scanner.
6. Perform a road test to confirm that the issue is resolved and the code does not return.

How to erase DTC P1680

To erase DTC P1680, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the engine to ensure the code does not reappear.

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