Ford F-350 Super Duty reduce power warning and check engine light issue on Ford F-350 Super Duty

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Ford F-350 Super Duty owners report experiencing reduced power warnings and check engine light issues, which typically indicate problems with the engine or emissions system. These warnings are triggered when the on-board diagnostic system detects an issue, and ignoring them can lead to more serious problems and costly repairs. Common causes include turbo overboosting, which may trigger error codes like P259F. Owners are advised to use a good code scanner to retrieve diagnostic trouble codes from the OBD II system to help identify the underlying problem. In some instances, a "reduced power" condition may appear without codes, potentially due to tuning issues or scan tool malfunctions. It is crucial to address these warnings promptly to prevent further damage and ensure optimal vehicle performance, and consulting a qualified mechanic or dealership is recommended for thorough diagnosis and repairs.

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