P1490 – Infiniti DTC

Infiniti DTC P1490 – Vacuum Cut Valve Bypass Valve (Circuit)

DTC P1490 meaning on Infiniti

1. DTC P1490 refers to the Vacuum Cut Valve Bypass Valve (Circuit) in Infiniti vehicles.
2. This diagnostic trouble code indicates an issue with the electrical circuit of the Vacuum Cut Valve Bypass Valve.

Infiniti DTC P1490 symptoms

• Check Engine Light (CEL) illuminated on the dashboard.
• Reduced engine performance or power.
• Possible rough idling or stalling.

Infiniti DTC P1490 causes

• Faulty Vacuum Cut Valve Bypass Valve.
• Open or short circuit in the wiring related to the valve.
• Corrosion or poor connections in the electrical system.

Infiniti DTC P1490 seriousness

1. While the vehicle may still be operable with this DTC, it is important to address it promptly to prevent potential engine performance issues.
2. Continued driving with this fault unresolved could lead to further damage to engine components.

How to diagnose DTC P1490 on Infiniti

1. Use an OBD-II scanner to retrieve the specific DTC P1490 code.
2. Inspect the Vacuum Cut Valve Bypass Valve and associated wiring for any visible damage or corrosion.
3. Perform a continuity test on the circuit to check for any open or short circuits.

How to fix DTC P1490 on Infiniti

1. Replace the Vacuum Cut Valve Bypass Valve if it is found to be faulty.
2. Repair any damaged wiring or connectors in the circuit.
3. Clear the DTC using an OBD-II scanner after completing the repairs.

How to erase DTC P1490 on Infiniti

1. Use an OBD-II scanner to access the vehicle’s onboard computer system.
2. Select the option to clear the DTCs stored in the system.
3. Follow the prompts on the scanner to confirm the deletion of the DTC P1490 code.