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.
DTC P0705: Transmission Range Switch Circuit: Description
The transmission range switch is a multi-signal switch which sends a signal to the PCM to indicate gear selection. The transmission range switch uses four discrete circuits to pull four PCM inputs low in various combinations to indicate each gear range. The voltage level of the circuits is represented as OFF = grounded, ON = open circuit. The four states displayed represents the encoder P, A, B and C inputs in sequence. See Figure .
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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.