P082F: Gear Lever Y Position Sensor 1 Circuit High

What does P082F mean?

Gear lever X and Y position sensors detect a selector's position in two directions: on an H-gate shift and select direction (a LuK patent uses two sensors about 90° apart), on a shift-by-wire lever its two axes. P0820 covers the whole X-Y circuit, P0821–P0824 and P082A–P082F sensor 1, P089A–P08A3 a redundant sensor 2. GM uses P082A–P082F on its electronic range selector (2019 tables, Cadillac XT4, 2025): a Hall sensor delivers a PWM signal, measured as duty cycle. P082F is P082C for the Y axis: the duty cycle of Y sensor 1 is too high – above 88 % in 2019 or above 95 % in 2025, with 3 of 4 or 10 of 12 samples. Type B, MIL after two trips; sensor 2 takes over, and with both failed the vehicle goes to park.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Symptoms

• Check engine lamp after two trips (GM)
• 'Shift to park' message or transmission warning
• Range selection restricted; with both sensors failed the vehicle goes to park

Common causes

• High Signal wire shorted to positive
• Medium Signal or ground wire open (pulled-up input)
• Medium Sensor faulty
• Low Control module

Likelihood is a general estimate across vehicles; your make and model may differ.