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.
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HOMESERVICE MANUALSBUICK2013REGAL TURBO PREMIUM, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 13 (AUTOMATIC TRANSMISSION - 6T40/6T50 (MHH, MHK) - SPECIFICATIONS)SPECIFICATIONSTRANSMISSION FLUID PRESSURE SWITCH LOGIC
2013 Buick Regal Turbo Premium, Standard Trans
Transmission Fluid Pressure Switch Logic
2013 Buick Regal Turbo Premium, Standard TransSECTION Transmission Fluid Pressure Switch Logic
WARNING: This page is about a different variant/trim than selected.
Transmission Fluid Pressure Switch Logic
| Gear | Transmission Fluid Pressure Switch States | |||
|---|---|---|---|---|
| Switch 1 | *Switch 3 | Switch 4 | Switch 5 | |
| Park | Low | Low | Low | Low |
| Reverse | Low | Low | Low | Low |
| Neutral | Low | Low | Low | Low |
| Drive 1st - Engine Braking | Low | High | Low | Low |
| Drive 1st | High | High | Low | High |
| Drive 2nd | High | Low | Low | High |
| Drive 3rd | Low | High | Low | High |
| Drive 4th | High | High | Low | Low |
| Drive 5th | Low | High | High | Low |
| Drive 6th | High | Low | High | Low |
| High = 12V (Switch Open or Pressurized) Low = 0V (Switch Closed or No Pressure) Note: All transmission fluid pressure switches are normally closed (NC) *Transmission fluid pressure switch 2 does not exist |
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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.