DTC codes / Honda codes / P1122
P1122 on a Honda means the powertrain control module (PCM) has detected a throttle position sensor (TPS) signal voltage that is higher than the programmed limit for the current operating conditions. The computer sees the throttle as being open wider than it should be, which can upset idle quality, fuel delivery, and automatic transmission shift logic.
Guidance is general and written for Honda vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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