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The limp mode in a 4T65E transmission typically occurs when the transmission control module (TCM) detects a fault, such as a sensor malfunction or internal failure. In this mode, the transmission limits its functionality to prevent further damage, usually restricting it to second gear or "limp home" mode. This allows the vehicle to be driven but at reduced performance, prompting the driver to seek repairs. It's crucial to diagnose and address the underlying issue to restore normal operation.

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1mo ago

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