P0723
PowertrainTransmissionmoderate severityTorque Converter/Brake Switch B Circuit Intermittent
What P0723 Means
The brake switch input to the transmission controller is cutting out intermittently. This affects torque converter lockup and cruise control cancel logic.
Symptoms
- Intermittent cruise dropout
- Torque converter lockup issues
- Random brake light complaints
Common Causes
- Loose brake switch connector
- Intermittent wiring fault
- Failing brake switch
- Faulty TCM
Diagnostic Steps
- Retrieve codes and freeze frame
- Monitor brake switch input while pressing pedal
- Wiggle-test switch wiring
- Replace brake switch if intermittent
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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 →
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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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