Brake Pressure Sensor D Circuit Range/Performance

Where it lives

For C0578, start at the sensor the description names.

Check these first

• A brake pressure sensor D that reads outside the expected range
• Air trapped near sensor D in the hydraulic circuit
• A sensor D that lost its calibration
• A valve sticking and holding pressure at sensor D
• A failing sensor D with an unstable signal

What to do next

1. Compare brake pressure sensor D to the other pressure sensors on live data
2. Bleed the hydraulic circuit if air is suspected near sensor D
3. Inspect the sensor D connector and wiring for damage
4. Command the related valves with a scan tool to check for a stick
5. Replace brake pressure sensor D if the range stays out of spec
6. Clear the code and retest

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