Lost Communication With Motor Electronics Coolant Pump C

Where it lives

For U0648, the part to look at first is the pump named here.

Check these first

• The network cannot reach motor electronics coolant pump C
• An open winding in pump C
• A corroded connector at pump C
• A short in the pump C harness
• A lost driver signal to coolant pump C

What to do next

1. Scan for motor electronics coolant pump C
2. Inspect the pump C wiring and connector
3. Check power and ground at pump C
4. Command pump C and listen for it running
5. Replace motor electronics coolant pump C if it stays offline
6. Clear the code and retest

Look up another code