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1996 Chevrolet Silverado P0719: Torque Converter/Brake Switch B Circuit Low - Diagnosis and Fixes

Model: 1996 Chevy Silverado Fault Code: P0719 Posted: 2015-07-09 17:32

Fault Code P0719 indicates a 'Torque Converter/Brake Switch B Circuit Low' issue in the 1996 Chevrolet Silverado. This code typically points to a problem with the brake light switch or its associated circuit, which is part of a larger system involving transmission control. The brake light switch is not just a bulb-based component—it's one of several switches integrated into the brake pedal assembly. The TCC (Torque Converter Clutch) circuit is normally closed and opens when the brake pedal is pressed. If this signal fails or becomes weak, the vehicle’s transmission control module may interpret it as a low signal, triggering P0719. Common causes include a faulty brake light switch, poor electrical connections, corrosion, or internal wiring issues in the brake circuit.

Related fault codes
P0719
Comments (3)
Anonymous 2015-07-10 13:10

Check the brake light switch—it is part of a multi-switch assembly, not just the brake bulbs. The TCC circuit is normally closed and opens when the brake pedal is depressed. A faulty or misaligned switch can cause incorrect signal readings and trigger P0710/P0719 codes.

Anonymous 2015-07-10 17:17

Thanks for the clarification—this helps clarify how the system works.

Anonymous 2019-08-11 20:48

Hi, I’ve been dealing with the same P0719 issue on my 1996 Chevrolet Suburban. I already replaced the brake light switch and control module, but the code persists. Any additional troubleshooting steps or diagnostic tips would be greatly appreciated.