Code Definition

P1220 — Throttle motor position sensor 2 circuit fault

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

About P1220

P1220 is a manufacturer-specific powertrain diagnostic trouble code recorded for Honda vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1220 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.

P1220 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

DTC P1220 is a Honda specific code for a circuit fault in throttle position sensor 2, the second of the two throttle position sensors built into the electronic throttle body. The Powertrain Control Module (PCM) uses both throttle position sensors to confirm the exact angle of the throttle plate, with the second sensor providing a redundant signal for cross checking. P1220 sets when the PCM detects the sensor 2 circuit out of range, open, shorted, or disagreeing with sensor 1. Because throttle position is safety related, the system commonly drops into a reduced power fail safe mode, and the dri...

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