P0719
PowertrainTransmissionmoderate severityTorque Converter/Brake Switch B Circuit Low
What P0719 Means
The brake switch signal to the transmission controller is reading low. This switch tells the system when the brakes are applied for torque converter and cruise operation.
Symptoms
- Torque converter won't unlock
- Cruise control won't disengage
- Harsh coast-down behavior
Common Causes
- Faulty brake switch
- Short to ground in wiring
- Corroded connector
- Faulty TCM
Diagnostic Steps
- Scan for codes and freeze frame
- Check brake switch operation with scan tool
- Inspect wiring for short to ground
- Replace brake switch if faulty
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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