P1522 – OBD-II DTC

OBD-II DTC P1522 – IMRC Input Error (Bank 2)

DTC P1522 meaning

DTC P1522 refers to an “IMRC Input Error (Bank 2)” in the On-Board Diagnostics II (OBD-II) system. The IMRC, or Intake Manifold Runner Control, is responsible for optimizing the airflow into the engine by adjusting the position of the intake manifold runners. This code indicates that the Engine Control Module (ECM) has detected a malfunction or an unexpected signal from the IMRC system on Bank 2 of the engine.

DTC P1522 symptoms

Common symptoms associated with DTC P1522 may include:

• Check Engine Light illuminated
• Reduced engine performance
• Rough idling or stalling
• Poor fuel economy
• Unusual engine noises

DTC P1522 causes

Several factors can lead to the triggering of DTC P1522, including:

• Faulty IMRC actuator
• Wiring issues or damaged connectors in the IMRC circuit
• Vacuum leaks affecting the IMRC operation
• Faulty ECM or software issues
• Mechanical problems within the intake manifold

DTC P1522 seriousness

DTC P1522 can be considered serious as it may lead to reduced engine performance and efficiency. If left unaddressed, it can result in further engine damage or increased emissions. It is advisable to diagnose and repair the issue promptly to maintain optimal vehicle performance.

How to diagnose DTC P1522

To diagnose DTC P1522, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1522 code.
2. Inspect the IMRC actuator and its wiring for any visible damage or disconnections.
3. Check for vacuum leaks in the intake manifold and associated hoses.
4. Test the IMRC actuator operation using a multimeter to ensure it is functioning correctly.
5. Examine the ECM for any software updates or faults.
6. Clear the code and perform a test drive to see if the code reappears.

How to fix DTC P1522 step-by-step instructions

To fix DTC P1522, follow these steps:

1. Inspect and repair any damaged wiring or connectors related to the IMRC actuator.
2. Replace the IMRC actuator if it is found to be faulty.
3. Seal any vacuum leaks in the intake manifold or hoses.
4. Update or reprogram the ECM if necessary.
5. Reassemble any components that were removed during inspection.
6. Clear the DTC using an OBD-II scanner and perform a test drive to ensure the issue is resolved.

How to erase DTC P1522

To erase DTC P1522, 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 “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the codes.
5. Disconnect the scanner and start the engine to verify that the code does not reappear.

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