U0335 code meaning
Software Incompatibility With Hybrid/EV Battery Pack Sensor Module
What U0335 means
The battery pack sensor module is housed in the traction battery, where it measures pack current and voltage for the battery controller. U0335 records that this controller or another partner rejects the module's software. Ford's 2014 code interpretation lists U0335 for the hybrid battery pack sensor module without a MIL marker. GM runs a comparable check in the Volt battery: its VITM compares the software versions of all slave modules 200 ms after power-up at 9 V or more and stores the maker-specific P1EB1 as Type A. Stellantis reprograms the battery pack control module and other units of the 2025 electric Dodge Charger and, if U029A for the sensor module remains, lets the car sleep for six minutes (08-028-25). U059B is invalid data. Lacking trustworthy readings, the vehicle can block driving or charging.
U0335 at a glance
- Check engine lightUsually not
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0335
- Vehicle will not enter ready mode or drives with reduced power
- Charging does not start or stops early
- Range and state of charge shown incorrectly
Common causes of U0335
- Most likelyBattery controller updated without matching the sensor module, or the reverse
- PossibleSensor module or contactor box replaced with a part on another software level
- Less likelyProgramming of the battery modules interrupted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery sensor module
What each part of U0335 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 35 | The exact fault in that area. |
What to do next
- Note U0335 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 U0335
What does U0335 mean?
U0335 means "Software Incompatibility With Hybrid/EV Battery Pack Sensor Module". The battery pack sensor module is housed in the traction battery, where it measures pack current and voltage for the battery controller. It is a generic code, so it means the same on every make.
Is it safe to drive with U0335?
Drive gently and only to a workshop. With U0335 the car can go into limp mode (reduced power) to protect itself.
Will U0335 fail an emissions test?
Yes, it can. U0335 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U0335 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U0335 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.