TCS Control Channel B Valve 1

Where it lives

For C0003, the description names the valve as the part involved.

Check these first

• A failed TCS control channel B valve 1
• Open or short in the channel B valve 1 circuit
• Low brake fluid in the TCS reservoir
• A clogged brake line or hose feeding channel B valve 1

What to do next

1. Read the ABS and TCS codes and record all valve faults
2. Check the brake fluid level and top off if low
3. Test the channel B valve 1 circuit for opens and shorts
4. Command channel B valve 1 with a scan tool and listen for it
5. Replace the TCS valve body if channel B valve 1 does not respond
6. Clear the code and retest

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