The P1150 trouble code in a Toyota Prius typically indicates an issue with the air-fuel ratio sensor (AFR) in the exhaust system. To fix this code, start by inspecting the wiring and connectors associated with the AFR sensor for any damage or corrosion. If the wiring appears intact, consider replacing the sensor itself, as it may be malfunctioning. After making repairs or replacements, clear the trouble code and perform a test drive to ensure the issue is resolved.
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