Brake Booster Temperature Sensor C Circuit Low

Where it lives

For C05B3, the sensor sits on the circuit this code reports. The description of C05B3 reports a fault at the sensor.

Check these first

• A short to ground in the brake booster temperature sensor C signal wire
• A failed temperature sensor C reading a fixed low value
• A chafed harness shorting the sensor C signal to ground
• Corrosion in the sensor C connector dropping the signal
• A control module input fault on the sensor C channel

What to do next

1. Check the booster temperature sensor C connector for corrosion
2. Test the sensor C signal wire for a short to ground
3. Check the sensor C ground circuit
4. Compare sensor C live data with sensor A and sensor B
5. Replace temperature sensor C if the signal stays low
6. Clear the code and retest

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