Sensor Power Supply C Circuit Low

Common symptoms

What you'll notice

• Check the wiring and connections for any loose or damaged wires related to the sensor power supply circuit.
• Inspect and potentially replace the sensor power supply relay if it is faulty or not functioning properly.
• Verify the voltage and continuity of the sensor power supply circuit using a multimeter to ensure it is within the specified range.
• If all else fails, replace the sensor power supply

Common causes

Most likely first

1. Faulty sensor power supply
2. Loose or corroded wiring connections
3. Faulty sensor power supply control module
4. Short circuit in the sensor power supply circuit
5. Faulty ECM (Engine Control Module)

How to diagnose & fix

Work through it in order

1. Check Engine Light (MIL) illuminates on the dashboard
2. Decreased engine performance or power
3. Reduced fuel efficiency
4. Difficulty starting the vehicle
5. Stalling or intermittent engine misfire