P0719 OBD-II Trouble Code: Torque Converter/Brake Switch B Circuit Low

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0719 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0719 code

P0719 is a diagnostic trouble code (DTC) for "Torque Converter/Brake Switch B Circuit Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0719 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0719 code definition

When the PCM has stored the P0719 code, it indicates that there has been an abnormal voltage reading from the brake switch B circuit.

What the P0719 code means

The brake switch B circuit is part of the torque converter clutch system. This indicates the status of the brake pedal, and works as part of the system that deactivates the torque converter lock-up and cruise control. If the PCM detects an abnormal reading from the brake switch, it will store the P0719 code.

What causes the P0719 code?

The most likely cause of a low voltage reading in the torque converter/brake switch B circuit is a defective brake lamp switch, or a blown lamp fuse. There are several other possible causes, however, including:

  • Shorted, corroded, or open wiring
  • Shorted, corroded, or open electrical connectors
  • Blown bulbs
  • Misadjusted brake lamp
  • Faulty bulb sockets
  • Faulty PCM (only in very rare cases)

What are the symptoms of the P0719 code?

If the P0719 code is stored in the PCM, there are several symptoms that may be observed. These include:

  • Brake lamps that either do not illuminate, or that do not turn off.
  • Torque converter that does not lock up.
  • Torque converter lock-up that will not disengage.
  • Stalling when coming to a full stop.
  • Illuminated Check Engine lamp.
  • Other torque converter or torque converter clutch codes are likely to be stored in the PCM with this code.

How does a mechanic diagnose the P0719 code?

After an OBD-II scanner detects the P0719 code, a technician should begin with a visual inspection of all the wiring, connectors, and other components of the torque converter system. Any damaged elements should be replaced, reconnected, or repaired as necessary. They should then clear the code and perform a retest, checking that the Check Engine light does not reappear.

If the Check Engine lamp and code reappear immediately, then the mechanic should check for battery voltage with a digital volt/ohmmeter on the input and output sides of the brake lamp switch, as well as checking for continuity between the fuse and the input circuit. If any open or shorted circuits are found, they should be repaired. If voltage is found on the input side, and not on the output side of the brake lamp switch, it is likely that the brake lamp switch is faulty. This is one of the most common causes of this code.

If this is not the case, the mechanic should continue attempting to check for signals between components, checking for loose or faulty electrical components, and performing other repairs as necessary until the issue is found.

Common mistakes when diagnosing the P0719 code

When diagnosing the underlying cause of the P0719 code, the most common misdiagnosis is to blame the lock-up solenoid or the wiring, rather than to check the stop lamp switch, the lighting controller, or the brake lamp connectors and circuitry.

How serious is the P0719 code?

If the P0719 code is being detected, it should be addressed right away. This issue can seriously affect the drivability and safety of a vehicle.

What repairs can fix the P0719 code?

There are many ways that a technician can address a P0719 code detection. They include:

  • Replacing a defective brake lamp switch.
  • Replacing a blown lamp fuse.
  • Repairing or replacing shorted, corroded, or open wiring.
  • Repairing or replacing shorted, corroded, or open electrical connectors.
  • Replacing any blown bulbs.
  • Adjusting a misadjusted brake lamp
  • Repairing faulty bulb sockets.
  • Replacing a faulty PCM (only in very rare cases).

Additional comments for consideration regarding the P0719 code

It is always important to remember that after each potential solution is attempted, the code should be cleared from the PCM and the car should be retested. This process can help narrow down the true cause of the P0719 code, making it much easier to repair.

Need help with a P0719 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
Check Engine Light
P0719

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0719 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,526

Rating Summary
3,215
155
41
23
92
3,215
155
41
23
92

Grzegorz

38 years of experience
440 reviews
Grzegorz
38 years of experience
Grzegorz is AMAZING! Another mechanic from YourMechanic had mis-diagnosed and incorrectly installed a part on the wrong portion of my car, but Grzegorz bent over backwards to diagnose and fix the issue. Even though we had to go through a few iterations to get the right repair (since the previous mechanic had left without any details about what he had done), Grzegorz was always able to come to my neighborhood at a time convenient for me to take a look at the car. He's a clear communicator - punctual, highly skilled - and always keeps you in the loop with his schedule, plans, and what's wrong with your car. He even went above and beyond and took my car for a smog check just to be absolutely sure that my car had been 100% fixed. Definitely recommend working with Grzegorz if possible.
2003 VOLVO S60 - CHECK ENGINE LIGHT IS ON - SAN FRANCISCO, CALIFORNIA

Kenneth

17 years of experience
374 reviews
Kenneth
17 years of experience
Professional and knowledgeable about his craft!
1999 MERCEDES-BENZ S500 - CHECK ENGINE LIGHT IS ON INSPECTION - LOS ANGELES, CALIFORNIA

Edmar

19 years of experience
40 reviews
Edmar
19 years of experience
An absolute pleasure to work with. Arrived on-schedule, explained what he was doing and helped me better understand the issues with my car.
2011 KIA SORENTO - CHECK ENGINE LIGHT IS ON - IRVING, TEXAS

Isai

24 years of experience
224 reviews
Isai
24 years of experience
He was early for the appointment. Very knowledgeable. Provided exactly the info I needed. Provided me with prices on additional work. Left me feeling at ease about my car. Amazing mechanic.
2002 CHEVROLET IMPALA - CHECK ENGINE LIGHT IS ON - SAN ANTONIO, TEXAS

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...

Related questions

Q: Check Engine Light does not come on even though there are trouble codes present

The pink/light green wire in ECM pin 2 on the connector will ground the wire internally to the ECM to turn on the Check Engine Light. You could test the wire with the key on and it should have battery...

Q: Diagnosed as code P0420

When you get a P0420 code that indicates a failing catalytic converter. Most of the time that is exactly what it is. In some cases, it can also be caused by a bad oxygen sensor. I typically use a computer...

Q: Check Engine Light is on - 2007 Toyota Sienna

This code relates to a heated oxygen sensor which is a unit inside your exhaust system that reads exhaust gases and relays this information to the car's computer. The computer uses this information to make adjustments to fueling. This sensor...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com