1628

Possible Causes

• •Five or more address conflict errors detected by the ECM while the engine is running
• •Two devices with the same network address
• •Presence of 'add on' CAN devices
• •CAN address conflict
• •Intermittent problem
• •Faulty CAN device

Suggested Actions

1. 1Perform On-Board (OBD) System Check
2. 2Disconnect CAN devices one at a time to isolate the conflicting device
3. 3Contact the CAN device manufacturer for additional CAN address information
4. 4Replace the conflicting CAN device
5. 5Resolve the CAN address conflict
6. 6Clear DTC information from the ECM using a Diagnostic Scan Tool (DST)
7. 7Disconnect CAN devices one at a time, clear DTC 1628, key ON (or crank for at least 3 seconds), wait 5 seconds, and check if the DTC resets to isolate the conflicting device
8. 8Replace the conflicting CAN device or resolve the address conflict
9. 9Clear DTC information from the ECM using the Diagnostic Scan Tool (DST), cycle ignition OFF for 30 seconds, and operate the vehicle to full operating temperature to verify the system is OK

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