AIR System Air Flow/Pressure Sensor Circuit Intermittent/Erratic Bank 1

Where it lives

For P2434, the sensor sits on the circuit this code reports. The description of P2434 puts it on bank 1.

Check these first

• A loose connection at the bank 1 AIR sensor connector
• A failing bank 1 AIR air flow/pressure sensor
• Chafed wiring grounding the sensor signal
• An intermittent secondary air pump or valve fault

What to do next

1. Watch bank 1 AIR air flow/pressure on a scan tool while wiggling the harness
2. Inspect the sensor connector for loose pins
3. Check the sensor wiring for chafing
4. Test the secondary air pump and valve for intermittent operation
5. Replace the bank 1 AIR air flow/pressure sensor if the signal stays unstable
6. Clear the code and retest

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