U3025Control Module A Disable Circuit/Open
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- Safety-relevant systems often give a supervising controller a hard-wired line through which it can switch off another module or its power stage, independent of the bus. Bosch patent US6804564B2 describes a first control unit that de-energizes a faulty second unit over such an output line, and FCA patent US10676100B2 shows a hybrid where control processor, motor processor and a monitor each have their own shutoff line to the inverter gate driver. U3025 says this disable line to module A is open or electrically missing. No manufacturer documents U3025 publicly. A broken line is serious either way: depending on the logic, module A may treat it as a permanent shutdown request and refuse to run, or stopping it in an emergency becomes impossible, which is why the system usually keeps the function off.
- What you may notice
- Function of module A unavailable, e.g. drive system not ready
- System warning message in the cluster
- Likely causes
- LikelyBroken disable wire or unplugged connector between the two modules
- PossibleCorroded or pushed-out pin on the disable line
- RareOutput driver of the supervising module no longer driving the line
- RareInput stage of module A misreading the line
- Repair
- Hard · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.