P2D57

Generator B Control Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Check Engine Light Is On
Unstable generator operation
Battery low
Voltage surges in the on-board network

Causes

Generator B fault
Wiring harness damage
Poor contact in connectors
Control module malfunctions
Relay or fuse problems

How to Fix

Check the condition of generator B
Inspect the wiring harness for damage
Check contacts in connectors
Test the control module
Replace faulty components

Related codes

P2D56 P2D58 P2D59