P0978

Shift Solenoid C Control Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect gear shifting
Hard gear shifts
Transmission transition to emergency mode
Check Engine light comes on
Reduced transmission efficiency

Causes

Shift solenoid C malfunction
Open or short circuit in control circuit
Poor connection or corrosion in connectors
Transmission control module (TCM) malfunction
Problems with the hydraulic transmission system

How to Fix

Check solenoid C control circuit for opens and shorts.
Check connections and connectors for corrosion or damage
Check the resistance and functionality of solenoid C
Replace solenoid C if necessary
Check and, if necessary, replace the transmission control module (TCM)

Related codes

P0976 P0977 P0979