Vacuum Sensor Supply Voltage Low

Where it lives

For C0548, the circuit described runs through the sensor. The description of C0548 reports low voltage at the sensor.

Check these first

• A low or missing supply voltage to the vacuum sensor
• A short to ground in the sensor supply circuit
• A blown fuse feeding the vacuum sensor
• A loose or corroded sensor connector
• A fault in the module supplying the reference voltage

What to do next

1. Check the fuse feeding the vacuum sensor
2. Inspect the sensor connector and wiring
3. Measure the supply voltage at the sensor
4. Repair the supply circuit or replace the sensor
5. Clear the code and retest

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