U0075Control Module Communication Bus C Off
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- Which traffic runs on Bus C differs from brand to brand, so U0075 means little until the storing module is known. On the 2015 Cadillac Escalade with Driver Assist, the active safety module records it alongside radar and camera codes; GM found that a worn diagnostic interface or cable on DLC pins 3 and 11, where the object detection network ends, can create these entries falsely. On the 2020-24 CT5, U0075 together with lost-communication codes led to CAN 1 wires 4986/4987 chafed on the passenger seat frame, with steering, stability and airbag messages. The 2026 Dodge Charger 3.0 turbo uses the code under the J2012 name, set falsely with MIL and cured by new PCM software. First identify the module and its network, then measure.
- What you may notice
- Service messages for steering, stability control or airbag
- Driver assistance, radar or front camera unavailable
- MIL on with no driveability complaint (FCA)
- Likely causes
- LikelyBus C wires chafed on a seat frame or body edge
- PossibleEngine module software setting the code falsely
- RareDefective diagnostic interface or cable creating false entries
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.