U2023
Fault Received From External Node
U2023 is an OBD-II diagnostic trouble code meaning: Fault Received From External Node. Common causes: damage to the wiring harness between modules, malfunction of one of the electronic modules. Estimated repair cost: $6–167.
Symptoms
- Check Engine light comes on
- Possible malfunctions in the operation of related systems (for example, ABS, ESP)
- Loss of some functions (cruise control, climate control)
- Unstable engine operation in rare cases
Causes
- Damage to the wiring harness between modules
- Malfunction of one of the electronic modules
- Poor contact in connectors
- Software failure in the module
- Module power problems
How to Fix
- Check wiring harness for damage
- Inspect connectors of associated modules
- Check the power and ground of the problematic module
- Read error codes from all modules
- Update module software
Related codes
FAQ
What does the U2023 code mean?
U2023 is an OBD-II diagnostic trouble code that indicates: Fault Received From External Node
What causes a U2023 error code?
The most common causes of U2023 include: Damage to the wiring harness between modules; Malfunction of one of the electronic modules; Poor contact in connectors; Software failure in the module.
How do I fix a U2023 diagnostic trouble code?
To fix U2023: Check wiring harness for damage. Inspect connectors of associated modules. Check the power and ground of the problematic module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U2023?
Do not drive — repair immediately
How much does it cost to fix U2023?
The estimated repair cost for U2023 is $6–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat