P270D is stored when the thermal state of shift element D rises above the controller's limit. The heat comes from friction during slip, so anything that lengthens slip on D counts: a sluggish apply, leaking seals in its hydraulic circuit, or hard use with a heavy load. Cooling also matters, because the fluid carries the heat away; a blocked cooler, a low level or oil that has lost its properties make the code more likely. Publicly, no manufacturer documents P270D or its thresholds, and the letter must be matched to a clutch with the specific gearbox data. CARB treats transmission controls as monitored powertrain components. For the driver the code mostly means a protective torque or gear limit; it does not by itself prove mechanical damage, but it should be investigated if it returns.
Medium severity. Can I keep driving?Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
Symptoms
- Limited torque or gear range for protection
- Transmission temperature warning
- Flare or slip on shifts involving element D
Most likely causes
- Leaking seals in the apply circuit of element D lengthening slip
- Blocked or undersized fluid cooler, especially when towing
- Old or wrong fluid with reduced friction and cooling properties
- Worn plates of element D
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It can trigger limp mode.
What each character of P270D means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 7: Transmission
- 0D: Specific fault in that system
Frequently asked questions
Can I keep driving with code P270D?
Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
What causes code P270D?
The most common causes are: leaking seals in the apply circuit of element D lengthening slip; blocked or undersized fluid cooler, especially when towing; old or wrong fluid with reduced friction and cooling properties.
Related codes
- P270ATransmission Friction Element A Temperature Too High
- P270BTransmission Friction Element B Temperature Too High
- P270CTransmission Friction Element C Temperature Too High
- P270ETransmission Friction Element E Temperature Too High
- P270FTransmission Friction Element F Temperature Too High
- P2703Transmission Friction Element D Apply Time Range/Performance
- P0218Transmission Fluid Temperature Sensor A Over Temperature Condition
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.