Brake Pressure Sensor M Circuit/Open

Where it lives

For C0649, the circuit described runs through the sensor. The description of C0649 reports the sensor as open.

Check these first

• An open in the brake pressure sensor M signal circuit
• A failed brake pressure sensor M
• Corrosion or damage at the brake pressure sensor M connector
• A broken wire in the brake pressure sensor M harness
• An ABS module that cannot read brake pressure sensor M

What to do next

1. Read brake pressure sensor M with a scan tool
2. Test the brake pressure sensor M signal circuit for an open
3. Inspect the brake pressure sensor M connector and wiring
4. Check the brake pressure sensor M reference and ground
5. Replace brake pressure sensor M if the circuit tests good
6. Clear the code and retest

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