P0894 code meaning
Transmission Component Slipping
Powertrain system Generic code P08xx codes Check engine light
What P0894 means
P0894 reports slip of a gearbox component, found by comparing speeds. GM's 4L60-E applies it to the torque converter clutch: with lock-up commanded, slip between 100 and 550 rpm for 12.75 s on the third attempt in 4th gear sets it, type B with MIL after two trips; the module first freezes adaptation and raises line pressure. Lexus (Aisin AB60F) and Allison 1000 use it for a slipping shift element or low pressure and name the fluid level first. On the 4L60-E a cracked converter clutch PWM solenoid is a known cause.
P0894 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 12 hours
- Clears after repairAfter a drive cycle
Symptoms of P0894
- Engine speed rises without matching acceleration, mostly when warm
- Shudder during lock-up
- Harsh shifts from maximum pressure, limp mode possible
Common causes of P0894
- Most likelyLow, wrong or worn fluid
- Most likelyConverter clutch PWM solenoid cracked or regulator bore worn (GM 4L60-E)
- PossibleWorn clutch plates or converter clutch lining
- PossiblePump not priming, cracked suction filter (Allison)
- Less likelyControl module software
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Torque converter clutchTransmission clutchesTransmission fluidTransmission pumpTcc pressure solenoid
What each part of P0894 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8 | Area: transmission. |
| 94 | The exact fault in that area. |
What to do next
- Note P0894 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0894
What does P0894 mean?
P0894 means "Transmission Component Slipping". P0894 reports slip of a gearbox component, found by comparing speeds. It is a generic code, so it means the same on every make.
Is it safe to drive with P0894?
Drive gently and only to a workshop. With P0894 the car can go into limp mode (reduced power) to protect itself.
Will P0894 fail an emissions test?
Yes, it can. P0894 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0894 to fix?
Difficulty: hard. A typical repair takes 0.5 to 12 hours of work. This is a job for a workshop.
Will P0894 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.