P1424 – OBD-II DTC

OBD-II DTC P1424 – Split Air #2 Circuit Malfunction

DTC P1424 meaning

DTC P1424 refers to a malfunction in the Split Air #2 circuit, which is part of the vehicle’s emissions control system. This code indicates that the Engine Control Module (ECM) has detected an issue with the operation of the secondary air injection system, specifically the circuit responsible for the second air pump or valve. The secondary air system is designed to reduce emissions during cold starts by injecting air into the exhaust system to help burn off excess hydrocarbons.

DTC P1424 symptoms

Common symptoms associated with DTC P1424 may include:

• Check Engine Light (CEL) illuminated
• Increased emissions during vehicle operation
• Rough idling or stalling
• Decreased fuel efficiency
• Possible unusual noises from the engine bay

DTC P1424 causes

Several factors can lead to the triggering of DTC P1424, including:

• Faulty secondary air pump
• Damaged or corroded wiring in the Split Air #2 circuit
• Defective air injection valve
• Blocked or restricted air passages
• Faulty Engine Control Module (ECM)

DTC P1424 seriousness

DTC P1424 is considered a moderate issue. While it may not cause immediate drivability problems, it can lead to increased emissions and potential failure during emissions testing. Ignoring this code can result in further damage to the emissions system and may affect overall vehicle performance.

How to diagnose DTC P1424

To diagnose DTC P1424, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1424 code.
2. Inspect the secondary air pump and associated wiring for visible damage or corrosion.
3. Check the operation of the secondary air injection valve.
4. Test the voltage and ground at the air pump connector.
5. Perform a functional test of the secondary air system to ensure it operates correctly.

How to fix DTC P1424 step-by-step instructions

To fix DTC P1424, follow these steps:

1. Repair or replace any damaged wiring or connectors in the Split Air #2 circuit.
2. If the secondary air pump is faulty, replace it with a new unit.
3. Replace the air injection valve if it is not functioning properly.
4. Clear any blockages in the air passages leading to the secondary air system.
5. Recheck the system operation and ensure the DTC does not return.

How to erase DTC P1424

To erase DTC P1424 from the vehicle’s computer, 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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