P0820
ŚredniFault in the gear shift lever position sensor circuit (X-Y axis). The sensor monitors the current position of the transmission lever and sends a signal to the transmission control module (TCM/PCM).
OBD-II (EN): Shift Solenoid B Control Circuit Malfunction
Code P0820 indicates a fault in the gear shift lever position sensor circuit (X-Y axis), which informs the transmission computer about the currently selected driving mode. The cause could be damaged wiring, corrosion of electrical connectors, or a faulty sensor itself. Due to the possible transition of the transmission into limp mode, diagnostics at a service center are recommended as soon as possible.
Symptoms
• Incorrect transmission operation or difficulty shifting gears • Check Engine Light (MIL) illuminated on the dashboard • Transmission may enter limp mode • Delayed or imprecise gear shifts • Incorrect gear shift lever position displayed on the dashboard • Possible engine starting issues (in some vehicles, start lockout outside P/N position)
Possible causes
• Damaged or chafed wiring leading to the shift lever position sensor (short, open circuit) • Corroded or loose electrical connectors at the sensor or TCM/PCM module • Faulty gear shift lever position sensor (X-Y) • Faulty transmission control module (TCM) or engine control module (ECM/PCM) • Mechanical damage to the gear shift lever or gear selection mechanism
Affected systems
Does code P0820 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.