Barometric Pressure Sensor B Circuit Low

Where it lives

For P222C, the sensor sits on the circuit this code reports. The description of P222C reports a fault at the sensor.

Check these first

• A short to ground on the sensor B signal wire
• A failed barometric pressure sensor B pulling its signal low
• Water intrusion at the sensor B connector
• An open in the sensor B reference circuit

What to do next

1. Read barometric pressure sensor B voltage on a scan tool
2. Test the sensor B signal wire for a short to ground
3. Inspect the sensor B connector for water intrusion
4. Check the sensor B reference circuit for an open
5. Replace barometric pressure sensor B if the wiring tests good
6. Clear the code and retest

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