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Home >> Porsche >> 2017 >> Macan Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 433 (Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATCM) -- Discovery Sport/L550) >> Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATCM) >> Description And Operation >> DTC B1421-4B: Left Front Cooled/Heated Seat Thermal Electric Device #2 - Over temperature >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2018 Land Rover Discovery Sport, 2017 Land Rover Discovery Sport, 2016 Land Rover Discovery Sport, and 2015 Land Rover Discovery Sport. However, it is still accessible from the selected car via links, so may be relevant.
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