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2008
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IS 250 RWD, Automatic
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Repair and Diagnosis
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Section 22 (Automatic Transaxle)
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Automatic Transmission System
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DTC U0100: Lost Communication with ECM / PCM "A"
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Typical Malfunction Thresholds
Typical Malfunction Thresholds
WARNING:
This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL MALFUNCTION THRESHOLDS
Communication between TCM and ECM
No communication