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.
Transmission Range (TR) Sensor
The PCM sends a voltage signal to the transmission range (TR) sensor. The TR sensor incorporates a series of step down resistors which act as a voltage divider. The PCM monitors this voltage, which corresponds to the position of the transmission range selector lever (P, R, N, Overdrive (Circle D), 2, 1) to determine desired gear and EPC pressure. The TR sensor is located on the top of the transaxle, and also contains the neutral/start, and reverse lamp circuits.
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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.