P0977

Shift Solenoid B Control Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect gear shifting
Switching delays
Transmission transition to emergency mode
Check Engine light comes on
Reduced vehicle dynamics

Causes

Short circuit in solenoid control circuit
Shift Solenoid B Malfunction
Wiring harness damage
Problems with connectors
Transmission control module (TCM) malfunction

How to Fix

Check the integrity of the solenoid control circuit
Check solenoid B resistance
Inspect the wiring harness and connectors for damage.
Replace solenoid B if necessary
Check the operation of the transmission control unit