P0778 — Shift Solenoid E Intermittent
Drivable short-term, but fix now to avoid damage.
What P0778 means
This code means the transmission control module detected an intermittent electrical problem with shift solenoid E, which helps control gear changes. Because the fault comes and goes, it's often caused by loose or corroded wiring, a failing solenoid, or low or dirty transmission fluid. Typical fixes range from repairing connectors and wiring to replacing the solenoid or servicing the transmission fluid.
Common symptoms
- Check engine light is on
- Transmission shifts roughly or unpredictably
- Slipping between gears
- Transmission occasionally enters limp mode
- Delayed or harsh gear engagement
Common causes
- Faulty or worn shift solenoid E
- Loose, corroded, or damaged wiring or connectors
- Low or contaminated transmission fluid
- Internal transmission electrical fault
- Failing transmission control module
Typical repair cost
$150 – $600
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0778 code?
For short trips, usually yes, but you shouldn't rely on it. The intermittent nature means the transmission could slip or enter limp mode at any time, so get it checked soon and avoid towing or long drives.
How much does it cost to fix a P0778 code?
Repairs typically run from about $150 to $600. A simple wiring or connector repair is on the low end, while replacing the solenoid or servicing fluid raises the cost.
Is a P0778 code serious?
It can be. While it's sometimes just a wiring issue, ignoring it risks transmission damage and unpredictable shifting, so it's best to address it promptly.
Why is this code intermittent rather than constant?
An intermittent fault usually points to a loose connection, corroded wiring, or a solenoid that only fails under certain temperatures or vibrations, which makes it tricky to catch but important to diagnose.