u1122 scp j1850 invalid or missing data for odometer
OBD2 Code: U1122
Description: SCP (J1850) Invalid or Missing Data for Odometer
Definition: This code indicates that the vehicle’s communication network has detected a problem with the data being sent to or from the odometer. The issue may be due to an interruption in communication, corrupted data, or a failure in one of the modules responsible for transmitting this information.
U1122 – SCP (J1850) Invalid or Missing Data for Odometer
Severity: Moderate
Common Causes
U1122 SCP J1850 Invalid or Missing Data for Odometer
Common Causes:
- Malfunctioning or faulty instrument cluster
- Wiring issues between the instrument cluster and the vehicle’s computer
- Corroded or loose connections in the communication network
- Software glitches in the vehicle’s computer system
- Faulty sensors related to odometer data
Common Misdiagnosis
OBD2 Code: U1122
Description: SCP (J1850) Invalid or Missing Data for Odometer
Common Misdiagnosis: Replacing the odometer or instrument cluster without checking the communication network for faults.
Common Diagnostic Steps
OBD2 Code: U1122 – SCP (J1850) Invalid or Missing Data for Odometer
- Verify the code is active by clearing it and performing a road test to see if it returns.
- Check for any additional codes that may indicate related issues with communication or other modules.
- Inspect the wiring harness and connectors between the instrument cluster, PCM, and any relevant modules for damage or corrosion.
- Test the battery voltage and charging system to ensure proper electrical supply to all components.
- Use a scan tool to monitor live data from the odometer circuit to identify irregularities in data transmission.
- If equipped, check the operation of related sensors such as wheel speed sensors that might affect odometer readings.
- Consult vehicle-specific repair manuals or technical service bulletins (TSBs) for known issues related to this code on your make/model.