U1238
Invalid Or Missing Data For Experimental #4
U1238 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Experimental #4. Common causes: electronic module software error, problems with the can network (damaged wires). Estimated repair cost: ~$167.
Symptoms
- Check Engine Light Is On
- There may be problems with the operation of some vehicle systems
- Errors in the infotainment system
- Reduced engine performance
- Unstable operation of the automatic transmission
Causes
- Electronic module software error
- Problems with the CAN network (damaged wires)
- Mismatch between software versions of different modules
- Interference in the electrical system
- Damage to connectors or corrosion of contacts
How to Fix
- Read all error codes and view still images
- Check the status of the CAN network (wire harness and connectors)
- Update the software of affected modules
- Check the power and ground of the problematic module
- Bring your car to an authorized dealer for diagnostics
Related codes
FAQ
What does the U1238 code mean?
U1238 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Experimental #4
What causes a U1238 error code?
The most common causes of U1238 include: Electronic module software error; Problems with the CAN network (damaged wires); Mismatch between software versions of different modules; Interference in the electrical system.
How do I fix a U1238 diagnostic trouble code?
To fix U1238: Read all error codes and view still images. Check the status of the CAN network (wire harness and connectors). Update the software of affected modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1238?
Yes, but get it checked soon
How much does it cost to fix U1238?
The estimated repair cost for U1238 is ~$167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat