Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pressure Sensor Lock-Up
The lock-up pressure sensor is positioned in the valve housing, which is mounted behind the side cover for the transmission. The lock-up pressure sensor consists of six electrical pressure switches. The pressure switches indicate the hydraulic pressure in the different transmission systems. The pressure sensor provides the transmission control module (TCM) with information about the system pressure and selected gear. The transmission control module (TCM) uses this information to control the lock-up solenoid, SL.
There are diagnostics for the lock-up pressure sensor.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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