u1174 invalid or missing data for primary id

OBD2 Code: U1174

Description: Invalid or Missing Data for Primary ID

Definition: This code indicates that the vehicle’s control module has detected invalid or missing data from a specific component or system, which is identified as the “Primary ID.” The issue could be due to a communication error, faulty wiring, or a malfunctioning sensor/component.

: Invalid or missing data for primary id
Severity: Medium

Common Causes

U1174 – Invalid or Missing Data for Primary ID

Common Causes:

• Loose or corroded wiring connections
• Faulty primary ID sensor
• ECU software issue
• Interference from other electronic devices

Common Misdiagnosis

Invalid or Missing Data for Primary ID:

Common Misdiagnosis: Replacing the control module without checking for wiring issues or communication errors in the network.

Common Diagnostic Steps

Invalid or Missing Data for Primary ID

1. Check the vehicle’s battery and charging system for proper voltage levels.
2. Inspect all related wiring and connectors for damage, corrosion, or loose connections.
3. Use a scan tool to check for any additional trouble codes that may be present.
4. Verify the integrity of the communication network (CAN bus) by checking continuity and resistance in the relevant circuits.
5. Test the primary control module (PCM/ECU) for proper operation and software updates.
6. If applicable, inspect sensors or modules associated with the primary ID for faults or malfunctions.