U042E
Invalid Data Received From Generator A Control Module
U042E is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Generator A Control Module. Common causes: generator malfunction, damage to the wiring harness to the generator. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Unstable operation of the charging system
- Reduced voltage in the on-board network
- Problems starting the engine
- Malfunctions of electronic systems
Causes
- Generator malfunction
- Damage to the wiring harness to the generator
- Problems with the generator control module
- Corrosion or poor contact in connectors
- Software error in the ECU
How to Fix
- Check the condition of the generator and its drive belt
- Inspect the alternator wiring harness and connectors
- Check battery voltage
- Scan the generator control module for errors
- Update ECU software if necessary
Related codes
Error U042E by Vehicle Brand
FAQ
What does the U042E code mean?
U042E is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Generator A Control Module
What causes a U042E error code?
The most common causes of U042E include: Generator malfunction; Damage to the wiring harness to the generator; Problems with the generator control module; Corrosion or poor contact in connectors.
How do I fix a U042E diagnostic trouble code?
To fix U042E: Check the condition of the generator and its drive belt. Inspect the alternator wiring harness and connectors. Check battery voltage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U042E?
Yes, but get it checked soon
How much does it cost to fix U042E?
The estimated repair cost for U042E is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat