Code result
P0B38
Motor Electronics Coolant Pump B Control Circuit/Open
High severity
What it means
The motor electronics coolant pump B control circuit reports a control circuit/open condition. Power electronics cooling cannot be commanded reliably on branch B.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Open in pump control wire
highOne of the most commonly reported causes for this code — check this first.
Open pump motor
mediumA plausible cause — test and verify before replacing parts.
Pin pushed back out of connector body
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P0B38 freeNo credit card required