u1102 invalid or missing data for primary id

OBD-II Code: U1102

Description: Invalid or Missing Data for Primary ID

Definition: This code indicates that the vehicle’s control module has detected a loss of communication with the primary identification (ID) data. This can be due to a malfunction in the data network, wiring issues, or a faulty control module.

: Invalid or missing data for primary id
Severity: Medium

Common Causes

Common causes:
– Faulty PCM
– Wiring issues
– Software issues

 

Common Misdiagnosis

Invalid or Missing Data for Primary ID
Common Misdiagnosis: Faulty ECU (Engine Control Unit) replacement without verifying wiring issues.

 

Common Diagnostic Steps

OBD2 Code: U1102
Description: Invalid or Missing Data for Primary ID

1. Check the vehicle’s battery and charging system to ensure proper voltage levels.
2. Inspect all related fuses and relays for any signs of damage or failure.
3. Examine the wiring harness and connectors associated with the primary ID module for any signs of corrosion, damage, or loose connections.
4. Use a scan tool to check for other diagnostic trouble codes (DTCs) that may provide additional context or point to a specific issue.
5. Verify the integrity of the communication network (CAN bus) by checking continuity and resistance in the circuit.
6. If applicable, update or reprogram the vehicle’s control modules with the latest software from the manufacturer.
7. If no issues are found, consider replacing the primary ID module after confirming it is faulty through testing procedures outlined by the manufacturer.