DTC Descriptor
WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
- DTC C056D 00
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Electronic Control Unit Hardware Malfunction
- DTC C056D 39
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Electronic Control Unit Hardware Internal Malfunction
- DTC C056D 3B
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Electronic Control Unit Hardware Self-Test Malfunction