Motor Electronics Coolant Pump B Control Circuit/Open

Where it lives

For P0B38, the pump sits on the circuit this code reports. The description of P0B38 reports the pump as open.

Check these first

• An open in the coolant pump B control circuit
• A failed motor electronics coolant pump B
• A blown coolant pump B relay or fuse
• Corrosion in the coolant pump B connector

What to do next

1. Command coolant pump B on with a scan tool
2. Check the pump B control circuit for an open
3. Measure the pump B motor resistance
4. Check the pump B relay and fuse
5. Replace pump B if the circuit tests good
6. Clear the code and retest

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