U1145
Invalid Or Missing Data For Primary Id
U1145 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: broken or damaged can bus wires, corrosion of contacts in connectors. Estimated repair cost: $6–167.
Symptoms
- Check Engine Light Is On
- Malfunctions of the car's electronic systems
- Lost connection with some sensors
- Unstable engine operation
- Problems with diagnostics via OBD-II connector
Causes
- Broken or damaged CAN bus wires
- Corrosion of contacts in connectors
- Malfunction of one of the electronic modules
- Problems with module power supply
- Software failure in the ECU
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect and clean the contacts in the connectors
- Check power supply and ground of electronic modules
- Read error codes from all available modules
- If necessary, replace the faulty module
Related codes
FAQ
What does the U1145 code mean?
U1145 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id
What causes a U1145 error code?
The most common causes of U1145 include: Broken or damaged CAN bus wires; Corrosion of contacts in connectors; Malfunction of one of the electronic modules; Problems with module power supply.
How do I fix a U1145 diagnostic trouble code?
To fix U1145: Check the integrity of the CAN bus wiring. Inspect and clean the contacts in the connectors. Check power supply and ground of electronic modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1145?
Yes, but get it checked soon
How much does it cost to fix U1145?
The estimated repair cost for U1145 is $6–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat