U302A code meaning
Control Module A Disable Feedback Circuit High
What U302A means
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.
U302A at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U302A
- System warning and function of module A unavailable
- In hybrids, possibly no ready mode or reduced drive power
Common causes of U302A
- Most likelyFeedback wire shorted to a battery or supply wire
- PossibleCorrosion bridging the readback pin to a neighbouring supply pin
- Less likelyModule A driving its feedback output permanently high
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Module disable feedback aFeedback wiring
What each part of U302A means
| U | Network system: communication between the control modules (CAN bus). |
| 3 | Reserved range, usually generic. |
| 2A | The exact fault in that area. |
What to do next
- Note U302A and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U302A
What does U302A mean?
U302A means "Control Module A Disable Feedback Circuit High". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U302A?
Drive gently and only to a workshop. With U302A the car can go into limp mode (reduced power) to protect itself.
Will U302A fail an emissions test?
U302A is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U302A to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will U302A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.