P0894Transmission Component Slipping
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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.
- What you may notice
- Engine speed rises without matching acceleration, mostly when warm
- Shudder during lock-up
- Harsh shifts from maximum pressure, limp mode possible
- Likely causes
- LikelyLow, wrong or worn fluid
- 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)
- RareControl module software
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.