U2142
Lost Communication With UART System
U2142 is an OBD-II diagnostic trouble code meaning: Lost Communication With UART System. Common causes: broken or damaged uart bus wires, oxidation of contacts in connectors. Estimated repair cost: $6–167.
Symptoms
- Some functions of the multimedia system do not work
- Lack of communication with some modules during diagnostics
- Check Engine Light Is On
- Malfunctions of the car's electronic systems
Causes
- Broken or damaged UART bus wires
- Oxidation of contacts in connectors
- Fault in one of the modules connected to the bus
- Problems with module power supply
- Software failure in the module
How to Fix
- Check the integrity of the wiring and connectors of the UART bus
- Clean connector contacts from oxides
- Check power and ground on problem modules
- Run diagnostics on related modules
- If necessary, replace the faulty module
Related codes
FAQ
What does the U2142 code mean?
U2142 is an OBD-II diagnostic trouble code that indicates: Lost Communication With UART System
What causes a U2142 error code?
The most common causes of U2142 include: Broken or damaged UART bus wires; Oxidation of contacts in connectors; Fault in one of the modules connected to the bus; Problems with module power supply.
How do I fix a U2142 diagnostic trouble code?
To fix U2142: Check the integrity of the wiring and connectors of the UART bus. Clean connector contacts from oxides. Check power and ground on problem modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U2142?
Yes, but get it checked soon
How much does it cost to fix U2142?
The estimated repair cost for U2142 is $6–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat