Code Definition

P1120 — TP Sensor 2

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Nissan

About P1120

P1120 is a manufacturer-specific powertrain diagnostic trouble code recorded for Nissan vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1120 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1120 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This Nissan DTC sets when the Engine Control Module (ECM) detects an abnormal signal from Throttle Position Sensor 2, a redundant sensor used in the electronic throttle control system. TP Sensor 2 works alongside TP Sensor 1 inside the electronic throttle body, and the ECM continuously compares the two signals to confirm the throttle plate position is reported correctly. This code logs when TP Sensor 2 produces a voltage outside its expected range, or one that deviates excessively from TP Sensor 1 under matching throttle conditions. Because the ECM cannot trust the throttle position, it common...

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