P079E
Transmission Friction Element E Slip Detected
Transmission (internal clutch/band)
Generic OBD-II
High
What it means
P079E means the transmission detected that internal friction element E — a clutch pack or band — is slipping instead of holding firmly. The commanded gear isn't fully locking up, so power is lost through the slipping element and heat builds, which can rapidly worsen internal wear. Low fluid, low apply pressure, or a worn clutch are the usual causes.
High
Can I keep driving? Drive as little as possible — an internal element is slipping, which builds heat and can quickly damage the transmission; have it serviced before it gets worse.
Common symptoms
What you'll notice
- Transmission slipping or struggling to hold a gear
- Delayed or erratic shifting
- Loss of power or weak acceleration
- Transmission overheating
- Low fluid level or signs of fluid leakage
Common causes
Most likely first
- Low transmission fluid reducing clutch/band apply pressureLikely
- Worn or burnt friction element (clutch pack or band)Common
- Faulty pressure-control or shift solenoid not applying the element fullyCommon
- Valve-body wear or a fluid leak dropping line pressureLess often
- Internal mechanical wear inside the transmissionLess often
How to diagnose & fix
Work through it in order
- Check transmission fluid level and condition first; if low or burnt, service with the correct fluid.
- Replace a clogged or damaged transmission filter.
- Read freeze-frame and scan for solenoid/pressure codes that point to the apply circuit.
- Test line pressure and the solenoid controlling element E.
- If pressure is correct but it still slips, the transmission needs internal inspection or rebuild of the friction element.
FAQ
Quick answers
Is it safe to drive with P079E?+
No, not for long — a slipping internal element generates heat that rapidly damages the clutches and fluid, so minimize driving and get it serviced.
Can I just clear P079E?+
Clearing it won't stop the slipping; the code returns and the internal wear continues until the fluid, pressure, or friction element is repaired.
Related codes
Often seen with P079E
Read & clear P079E yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX