OBD-II code · Network
U0596 Invalid Data Received From AC/AC Converter Control Module
A receiving module detected implausible data from the AC/AC converter control module (transformer/frequency-converter for industrial-vehicle accessories). Voltage or frequency values fail plausibility checks and are rejected.
Is it safe to drive with U0596?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyModule internal fault or sensor input drift
- PossibleSoftware version mismatch after replacement
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- AC AC Converter Module
Related codes
- U0593Invalid Data Received From Drive Motor Control Module B
- U0594Invalid Data Received From Hybrid/EV Powertrain Control Module
- U0595Invalid Data Received From Powertrain Control Monitor Module
- U0597Invalid Data Received From AC/DC Converter Control Module A
- U0598Invalid Data Received From AC/DC Converter Control Module B
- U0599Invalid Data Received From DC/DC Converter Control Module A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.