P0719Generic code

P0719 Code: Brake Switch B Circuit Low

The P0719 code means the brake switch signal used by the transmission is low, so the computer believes the brake is never pressed. It can affect torque converter unlocking and the shift lock. The repair is usually cheap, often a fuse or an adjustment.

Severity
Medium
Can I keep driving?
Yes, but with caution
Estimated cost
$5 to $150
Difficulty
Easy
System
Transmission
Applies to
All OBD2 vehicles

Updated Reviewed by Renzo Chacca

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What the P0719 code means

The transmission needs to know when you press the brake so it can unlock the torque converter when the vehicle stops (and keep the engine from stalling) and, on many vehicles, so it can let you take the lever out of park.

A permanently low signal is usually caused by a switch that is out of adjustment or by a blown brake light fuse. That is what sets the P0719 code.

A simple way to check is to look at the brake lights with someone's help. If they do not come on, start with the fuse and the switch. On many vehicles the same fault keeps the lever from coming out of park. There is a manual release button or slot next to the lever for emergencies.

P0719 code symptoms

  • The engine may stall when you come to a stop.
  • The lever will not come out of park.
  • Brake lights that do not come on.

Likely causes of the P0719 code

  1. Brake switch out of adjustment. It does not change state when you press the pedal.
  2. Blown brake light fuse.
  3. Wiring that is cut or shorted.

How to diagnose the P0719 code step by step

  1. Check the brake lights.
  2. Look at the brake signal on the scan tool.

How to fix the P0719 code

  • Adjust or replace the switch.
  • Replace the fuse, and clear the P0719 code once the brake lights work.

Technical reference data

  • 12 volt signal when the brake is pressed.
  • Reference values only: check the manufacturer data for your vehicle.

Brand-specific notes

The source reports this code on Ford and Mazda vehicles.

P0719 on Ford

Appears on Ford vehicles. Check the brake light fuse and the switch adjustment first.

P0719 on Mazda

Appears on Mazda vehicles. Check the brake light fuse and the switch adjustment first.

Frequently asked questions about P0719

What does the P0719 code mean?
It means the brake switch signal that the transmission uses is low. The computer thinks the brake is never pressed.
Can I drive with a P0719 code?
With caution. First make sure the brake lights work, because a dead brake light circuit is a safety risk on the road.
Why does the engine stall?
Because the torque converter does not unlock when you brake. The engine is then held back like a manual car with the clutch out.
Is it expensive to fix?
No. Most of the time it is a fuse or a switch adjustment.
How much does it cost to fix P0719?
Between $5 and $150, depending on whether you need only a fuse or a new switch with labor.

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