Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2017 Cadillac XTS BaseFACTORY OEM SERVICE PROCEDURE
Data Communication System - DTCS
DATA COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| DTC | Description |
|---|---|
| DTC B1000 | Electronic Control Unit |
| DTC B1001 | Option Configuration |
| DTC B101D | Electronic Control Unit Hardware |
| DTC B101E | Electronic Control Unit Software |
| DTC C056D | Electronic Control Unit Hardware |
| DTC C056E | Electronic Control Unit Software |
| DTC P0601, P0607, P060A-P060C, P0610, P062F, P16E9-P16F0, or P262B | Control Module |
| DTC U0020 | Low Speed CAN Bus |
| DTC U0028 | MOST Bus |
| DTC U0029 | MOST Bus Performance |
| DTC U0073 or U2100 | Control Module Communication Bus A Off/CAN Bus Communication |
| DTC U0075 | Control Module Communication Object Detection CAN Bus Off |
| DTC U0077 | Control Module Communication Chassis Expansion CAN Bus Off |
| DTC U0078 | Control Module Communication Low Speed CAN Bus Off |
| DTC U007B | Control Module Communication High Speed Extension CAN Bus Off |
| DTC U007C | Control Module Communication High Speed Extension CAN Bus 2 Off |
| DTC U007D | Control Module Communication Low Speed Extension CAN Bus Off |
| DTC U0100-U02FF | Control Module U Code List |
| DTC U0300-U0336: | Control Module U Code List |
| DTC U0400-U05FF | Control Module U Code List |
| DTC U1340-U135F | Control Module U Code List |
| DTC U1500-U15FF | Control Module U Code List |
| DTC U1653 | Chassis Systems High Speed Communication Enable Circuit |
| DTC U1814 | Powertrain Wake-Up Communication Circuit |
| DTC U1833 | Lost Communication with Electronic Brake Control Module on Chassis Expansion CAN Bus |
| DTC U184A | Lost Communication with Body Control Module on Low Speed CAN Bus |
| DTC U18B9-U18BF | Primary/Secondary High Speed CAN Bus Subnet Configuration List |
| DTC U2098 | MOST Communication Enable |
| DTC U2099 | High Speed Communication Enable Circuit |
| DTC U209E | Object Detection Control Module High Speed Communication Enable Circuit 1 |
| DTC U209F | Object Detection Control Module High Speed Communication Enable Circuit 2 |
| DTC U2160-U2231 | Control Module U Code List |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.