U302AControl Module A Disable Feedback Circuit High
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- U302A means the readback from module A's disable path is stuck above its valid range, for example through a short to a supply wire. The risk is a false all-clear or a false alarm, depending on which level stands for disabled. In a test sequence like the six-step shutoff check of FCA patent US10676100B2, a feedback that never drops will fail the steps where a shutdown is commanded, and the controller must assume the shutdown path does not work. FCA notes that such a result would eventually need a fault flag, and that blocking the vehicle outright could strand the driver, so it proposes rerouting the signal through another processor to keep availability. No manufacturer documents U302A publicly. Check the readback wire for contact with powered circuits and the connectors for moisture.
- What you may notice
- System warning and function of module A unavailable
- In hybrids, possibly no ready mode or reduced drive power
- Likely causes
- LikelyFeedback wire shorted to a battery or supply wire
- PossibleCorrosion bridging the readback pin to a neighbouring supply pin
- RareModule A driving its feedback output permanently high
- 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.