P1654 – OBD-II DTC

OBD-II DTC P1654 – Fuel Pump Resistor Switch Circuit Malfunction

DTC P1654 meaning

DTC P1654 refers to a malfunction in the fuel pump resistor switch circuit. This code indicates that the Engine Control Module (ECM) has detected an issue with the circuit that regulates the fuel pump’s operation, which can affect fuel delivery and engine performance.

DTC P1654 symptoms

Common symptoms associated with DTC P1654 may include:

• Engine stalling or difficulty starting
• Reduced engine power or performance
• Increased fuel consumption
• Check Engine Light illuminated

DTC P1654 causes

Several factors can lead to the triggering of DTC P1654, including:

• Faulty fuel pump resistor
• Wiring issues, such as shorts or open circuits
• Corroded or loose connectors in the fuel pump circuit
• Defective Engine Control Module (ECM)

DTC P1654 seriousness

The seriousness of DTC P1654 can vary, but it is generally considered a moderate issue. If left unaddressed, it can lead to:

• Inconsistent fuel delivery
• Potential engine damage due to inadequate fuel supply
• Increased emissions

How to diagnose DTC P1654

To diagnose DTC P1654, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the fuel pump resistor and associated wiring for visible damage.
3. Check the connectors for corrosion or loose connections.
4. Test the fuel pump resistor with a multimeter to ensure it is functioning correctly.
5. Examine the ECM for any faults or updates that may be necessary.

How to fix DTC P1654 step-by-step instructions

To fix DTC P1654, follow these steps:

1. Disconnect the battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors in the fuel pump circuit.
3. Replace the faulty fuel pump resistor if testing indicates it is not functioning properly.
4. Reconnect all connectors and ensure they are secure.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test drive the vehicle to ensure the issue is resolved and the Check Engine Light does not reappear.

How to erase DTC P1654

To erase DTC P1654, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the DTC menu on the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to ensure the code does not return.

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