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2021
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CT4 Sport, 4WD
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Repair and Diagnosis
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Section 162 (Data Communications - Diagnostic Information And Procedures (2 Of 3))
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Diagnostic Information and Procedures
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DTC U1978
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Conditions for Setting the DTC
Conditions for Setting the DTC
WARNING:
This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
The VIN is not programmed.