U1341 on 2019-2022 Hyundai Ioniq — Communication Fault with Engine Module (Manufacturer Specific)
1 vehicles · 1 makes
Most Reported On
U1341 is an OBD-II diagnostic trouble code meaning “Communication Fault with Engine Module (Manufacturer Specific).” U1341 is a manufacturer-specific network code indicating a communication fault with the engine control module (engine/PCM), meaning another module is not receiving the expected messages from the engine controller over the data bus. As a U-code it concerns the communication network rather than an internal engine part, and it typically results from wiring, connector, power, or module problems on the bus. Symptoms can include warning lights, lost features, or drivability issues depending on which data is missing. Because it is manufacturer-specific, the exact bus and pins involved should be confirmed against the vehicle's service information. This code is most commonly reported on 2019-2022 Hyundai Ioniq.
Common Causes
Diagnostic Tools
To diagnose U1341, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does U1341 mean?
U1341 stands for "Communication Fault with Engine Module (Manufacturer Specific)." U1341 is a manufacturer-specific network code indicating a communication fault with the engine control module (engine/PCM), meaning another module is not receiving the expected messages from the engine controller over the data bus. As a U-code it concerns the communication network rather than an internal engine part, and it typically results from wiring, connector, power, or module problems on the bus. Symptoms can include warning lights, lost features, or drivability issues depending on which data is missing. Because it is manufacturer-specific, the exact bus and pins involved should be confirmed against the vehicle's service information.
What are the most common causes of U1341?
The most common causes of U1341 are: Damaged, shorted, or open bus wiring to the engine module, Corroded or loose connectors at the engine control module, Loss of power or ground to the engine module, Internal engine control module failure, Faulty gateway or another module disrupting the bus, Blown fuse affecting module power, Bus terminating resistor or wiring harness fault. The specific cause varies by vehicle.
How much does it cost to fix U1341?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by U1341?
Au7o has documented U1341 across 1 vehicle models from 1 manufacturers: Hyundai.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.