Fluid Pressure Sensor/Switch: Service and Repair

2004 Pontiac Aztek AWD V6-3.4L VIN ESECTION Service and Repair
Transmission Fluid Pressure (TFP) Manual Valve Position Switch Replacement

Removal Procedure
1. Remove the case side cover.
2. Disconnect the transaxle wiring harness.





3. Remove the control valve body bolts (375, 379 and 381) that mount the fluid pressure manual valve position switch to the control valve body (300).
4. Carefully remove the fluid pressure manual valve position switch. Handle the switch carefully, the fluid pressure manual valve position switch is very delicate.





5. Inspect the fluid pressure manual valve position switch (395) for the following conditions:
^ Damaged electrical connector terminals
^ Damaged seals
^ Damaged switch membranes
^ Debris on the switch membranes

Installation Procedure





1. Carefully install the fluid pressure manual valve position switch. Handle the switch carefully, the fluid pressure manual valve position switch is very delicate.

2. Notice: Refer to Fastener Notice in Service Precautions.

Install the control valve body bolts (375, 379 and 381) that mount the fluid pressure manual valve position switch to the control valve body (300).
^ Tighten the control valve body bolt (375) to 12 Nm (106 inch lbs.).
^ Tighten the control valve body bolt (379) to 16 Nm (12 ft. lbs.).
^ Tighten the control valve body bolt (381) to 8 Nm (70 inch lbs.).
3. Connect the transaxle wiring harness.
4. Install the case side cover.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.