P0894 on Buick
Transmission Component Slipping
P0894 on Buick vehicles indicates transmission component slipping. Au7o has documented this code across 1 Buick model — most commonly on Envision. This generic transmission code means the PCM/TCM detected that a rotating component inside the transmission is slipping, by comparing input and output speeds and finding more difference than there should be for the commanded gear. Slippage indicates clutches or bands are not holding properly, which can quickly worsen and damage the transmission through overheating and accelerated wear. It often comes with rough or flaring shifts, reduced power, and overheating, and should be addressed promptly. Typical repair costs on Buick range from $900 to $4,500, depending on the specific model and root cause.
Common Causes of P0894
- •Low, dirty, or burnt transmission fluid
- •Worn clutch packs or bands
- •Faulty shift or pressure control solenoid
- •Internal hydraulic/valve body problems
- •Worn torque converter
- •Faulty speed sensors giving false slip readings
- •General internal transmission wear
P0894 on Buick by Model
Buick Envision(1 issue)
- 9T50/9T65 Nine-Speed Automatic Valve Body Fault - Harsh Clunk, Slipping and 'Service Transmission'2019-2022
The nine-speed automatic in later Envisions produces a violent intermittent clunk when engaging or shifting in Drive - described by one owner as 'so violent, it shakes the entire car' - with a tendency to slip on the 1-2 and 2-3 shifts, appearing around 14,000-15,000 miles. On Gen2 cars the same family of complaints escalates to a 'Service Transmission Soon' message with a total loss of acceleration that feels like the car dropped into neutral. One documented repair required replacing BOTH valve bodies, where the dealer found a nicked O-ring seal during disassembly. GM TSB 21-NA-169 provides diagnostic procedures for 9T45/9T50/9T60 fault codes, and TSB 23-NA-153 documents which shift delays are considered normal.
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View P0894 across all makes →Frequently Asked Questions
What does P0894 mean on Buick?▼
P0894 stands for "Transmission Component Slipping." This generic transmission code means the PCM/TCM detected that a rotating component inside the transmission is slipping, by comparing input and output speeds and finding more difference than there should be for the commanded gear. Slippage indicates clutches or bands are not holding properly, which can quickly worsen and damage the transmission through overheating and accelerated wear. It often comes with rough or flaring shifts, reduced power, and overheating, and should be addressed promptly. On Buick specifically, this code is documented across 1 model.
What causes P0894 on Buick vehicles?▼
Common causes on Buick: Low, dirty, or burnt transmission fluid, Worn clutch packs or bands, Faulty shift or pressure control solenoid, Internal hydraulic/valve body problems, Worn torque converter. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0894 on a Buick?▼
Repair costs on Buick range from $900 to $4,500, depending on the specific model and root cause.
Which Buick models have P0894 documented?▼
Au7o has documented P0894 on 1 Buick model: Envision.