U1138
Invalid Or Missing Data For Primary Id
U1138 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: broken or damaged can bus wires, poor contact in connectors. Estimated repair cost: ~$167.
Symptoms
- Check Engine Light Is On
- Reduced engine performance
- Disabling some vehicle systems
- Problems with diagnostics via scanner
Causes
- Broken or damaged CAN bus wires
- Poor contact in connectors
- Malfunction of one of the control modules
- Problems with module power supply
- Software glitch in the system
How to Fix
- Check the integrity of the CAN bus and connections
- Inspect connectors and contacts for oxidation
- Check the power and ground of all modules
- Scan all modules for errors
- If necessary, reflash the problematic module
Related codes
FAQ
What does the U1138 code mean?
U1138 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id
What causes a U1138 error code?
The most common causes of U1138 include: Broken or damaged CAN bus wires; Poor contact in connectors; Malfunction of one of the control modules; Problems with module power supply.
How do I fix a U1138 diagnostic trouble code?
To fix U1138: Check the integrity of the CAN bus and connections. Inspect connectors and contacts for oxidation. Check the power and ground of all modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1138?
Yes, but get it checked soon
How much does it cost to fix U1138?
The estimated repair cost for U1138 is ~$167. Actual cost depends on your vehicle, location, and labor rates.
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