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GS 350 AWD
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Repair and Diagnosis
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Section 168 (Engine Control System (DTCS P0420 - U0101 & Circuit Tests))
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SFI System
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DTC U0101: Lost Communication with TCM
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Typical Malfunction Thresholds
Typical Malfunction Thresholds
WARNING:
This page is about a different car, the 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
Communication signal
Lost communication with TCM