P0719

Brake Switch B Circuit Low

Q: Is it safe to drive with P0719?

Generally yes, but the transmission's torque converter lockup and the cruise control rely on this signal, so they may behave oddly. Also verify your brake lights work correctly.

Q: Can I just clear P0719?

It returns until the brake switch or its wiring is fixed. Since the same switch often runs your brake lights, it's worth repairing properly.

Transmission / brake switch input Generic OBD-II High

What it means

P0719 means the transmission controller sees a constantly low signal from brake switch B — the input that tells it whether the brake pedal is pressed. The controller uses this to release the torque converter clutch and manage cruise control, so a faulty switch or wiring can cause lockup shudder, cruise dropouts, and brake-light issues.

High

Can I keep driving? Usually drivable, but the torque converter may not lock up smoothly and cruise control may cut out. Get the brake switch checked soon.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Torque converter clutch not locking/unlocking smoothly (shudder or flare)
Cruise control won't engage or drops out
Brake lights possibly stuck on or not working

Common causes

Most likely first

Faulty brake light switch (brake switch B)Likely
Short-to-ground or open in the brake switch wiringCommon
Corroded or loose brake switch connectorCommon
Blown fuse in the circuitLess often
Failed transmission control module (least common)Less often

How to diagnose & fix

Work through it in order

Scan and confirm the brake switch signal changes when the pedal is pressed.
Check that the brake lights work and the switch is adjusted correctly at the pedal.
Inspect the brake switch wiring and connector for a short to ground or an open.
Check the relevant fuse.
Replace or re-adjust the brake switch as needed. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0719?+

Generally yes, but the transmission's torque converter lockup and the cruise control rely on this signal, so they may behave oddly. Also verify your brake lights work correctly.

Can I just clear P0719?+

It returns until the brake switch or its wiring is fixed. Since the same switch often runs your brake lights, it's worth repairing properly.

Read & clear P0719 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX