P1655 – OBD-II DTC

OBD-II DTC P1655 – PSP Switch Out of Self Test Range

DTC P1655 meaning

DTC P1655 refers to a diagnostic trouble code indicating that the Power Steering Pressure (PSP) switch is out of its self-test range. This code is generated when the Engine Control Module (ECM) detects an abnormal reading from the PSP switch during its self-diagnostic tests. The PSP switch is crucial for monitoring the pressure in the power steering system, which helps in adjusting the steering effort based on vehicle speed and load conditions.

DTC P1655 symptoms

Common symptoms associated with DTC P1655 may include:

• Illuminated check engine light
• Increased steering effort, especially at low speeds
• Unusual noises from the power steering system
• Erratic power steering assist
• Potential overheating of the power steering fluid

DTC P1655 causes

Several factors can lead to the triggering of DTC P1655, including:

• Faulty power steering pressure switch
• Wiring issues, such as damaged or corroded connectors
• Low power steering fluid levels
• Faulty power steering pump
• ECM software issues or malfunctions

DTC P1655 seriousness

The seriousness of DTC P1655 can vary. While it may not cause immediate safety concerns, it can lead to increased steering effort and potential steering system failure if not addressed. It is advisable to diagnose and repair the issue promptly to ensure safe vehicle operation and to prevent further damage to the power steering system.

How to diagnose DTC P1655

To diagnose DTC P1655, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1655 code.
2. Inspect the power steering pressure switch and its wiring for any visible damage or corrosion.
3. Check the power steering fluid level and condition.
4. Test the power steering pressure switch using a multimeter to ensure it operates within specifications.
5. Examine the power steering pump for proper operation.
6. Clear the code and perform a road test to see if the code reappears.

How to fix DTC P1655 step-by-step instructions

To fix DTC P1655, follow these steps:

1. Address any wiring issues by repairing or replacing damaged connectors.
2. Replace the faulty power steering pressure switch if it fails the multimeter test.
3. Refill or replace the power steering fluid if it is low or contaminated.
4. Inspect and replace the power steering pump if it is not functioning correctly.
5. Recheck all connections and ensure everything is secure.
6. Clear the DTC using an OBD-II scanner and perform a test drive to confirm the issue is resolved.

How to erase DTC P1655

To erase DTC P1655, 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 vehicle to ensure the check engine light is off.

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