P0868 on Subaru
Transmission Fluid Pressure Low
P0868 on Subaru vehicles indicates transmission fluid pressure low. Au7o has documented this code across 6 Subaru models — most commonly on Ascent, Crosstrek, Forester. This code indicates the transmission's internal fluid pressure is reading lower than the computer expects for current operating conditions. The transmission control module uses a pressure sensor to monitor line pressure, which is what applies the clutches and bands that engage gears. When that pressure stays below the target threshold, P0868 sets. Low line pressure can cause slipping, harsh or delayed shifts, and in severe cases internal clutch damage, so it should be addressed promptly. Typical repair costs on Subaru range from $200 to $9,000, depending on the specific model and root cause.
Common Causes of P0868
- •Low transmission fluid level
- •Worn or stuck-open pressure control solenoid
- •Internal leak (worn seals, gaskets, or valve body)
- •Faulty transmission fluid pressure sensor
- •Clogged transmission filter
- •Failing transmission (oil) pump
- •Worn or leaking valve body
- •Wiring or connector fault to the pressure sensor/solenoid
P0868 on Subaru by Model
Subaru Ascent(1 issue)
- CVT Transmission Hesitation and Harsh Engagement2019-2025
The Ascent's high-torque Lineartronic CVT (TR730 - the largest CVT Subaru has produced) paired with the 2.4L turbo FA24 engine exhibits hesitation from stops, harsh engagement when shifting from Park to Drive/Reverse, and surging at low speeds. The TR730 CVT must handle significantly more torque than Subaru's other CVTs, leading to durability concerns. Multiple TSBs have addressed calibration issues. Some owners report complete CVT failure under 60,000 miles.
Subaru Crosstrek(2 issues)
- CVT Chain Stretch and Transmission Judder2013-2021
The Lineartronic CVT (TR690) used in Crosstreks develops chain stretch over time, typically between 80,000-130,000 miles. The stretched chain causes slippage, resulting in judder during light acceleration, particularly between 20-45 mph. The issue worsens in cold weather and uphill conditions. Subaru addressed earlier models under warranty extension WTY-72 (10 years/100,000 miles) and released multiple software calibration updates. In severe cases, the CVT requires complete replacement.
- CVT Hesitation and Delay From Stop2013-2023
The Crosstrek's Lineartronic CVT exhibits a noticeable 1-2 second delay when accelerating from a complete stop, particularly at intersections. The hesitation is dangerous in situations requiring quick acceleration (merging, left turns across traffic). The issue is related to the CVT's torque converter lockup strategy and throttle mapping. Multiple TSBs have been released for TCM reprogramming, but the fundamental delay persists to some degree in most units.
Subaru Forester(1 issue)
- CVT Transmission Shudder and Premature Failure2014-2021
The Lineartronic CVT (TR690) in 2014-2021 Foresters can develop shuddering, hesitation, and in severe cases, complete failure. Symptoms typically begin around 60,000-100,000 miles. The CVT chain can stretch, causing slippage and shudder during light acceleration. The torque converter can also develop issues. Subaru extended CVT warranty to 10 years/100,000 miles under Customer Satisfaction Program WTY-72. Multiple software updates have been released to address shifting behavior.
Subaru Impreza(1 issue)
- CVT Transmission Failure and Harsh Engagement2012-2020
The 2012+ Impreza's Lineartronic CVT (TR580 for 2.0L models) is prone to harsh engagement, delayed acceleration response, and premature failure. The smaller TR580 CVT handles the 2.0L engine but can develop valve body issues causing harsh shifts into Drive/Reverse and a pronounced thunk when engaging gear from Park. The CVT chain can stretch, and the transmission oil pump can fail. Subaru extended the CVT warranty to 10 years/100,000 miles on affected models.
Subaru Legacy(1 issue)
- CVT Transmission Failure2010-2020
The 2010+ Legacy uses the Lineartronic CVT (TR690 for 2.5L, TR580 for 2.5i base) which has widespread reports of premature failure, typically between 80,000-140,000 miles. Failures include chain stretch, torque converter shudder, valve body malfunction, and complete transmission failure. The 2010-2014 models are most affected. Subaru extended CVT warranty coverage to 10 years/100,000 miles. Symptoms often start with subtle judder during light acceleration and progress to complete loss of drive.
Subaru Outback(1 issue)
- CVT Transmission Shudder/Hesitation2012-2019
The Lineartronic CVT can develop shudder, hesitation, or jerky operation, especially during light acceleration at low speeds. Subaru has updated CVT software multiple times to address these concerns.
Looking for P0868 on a different make?
View P0868 across all makes →Frequently Asked Questions
What does P0868 mean on Subaru?▼
P0868 stands for "Transmission Fluid Pressure Low." This code indicates the transmission's internal fluid pressure is reading lower than the computer expects for current operating conditions. The transmission control module uses a pressure sensor to monitor line pressure, which is what applies the clutches and bands that engage gears. When that pressure stays below the target threshold, P0868 sets. Low line pressure can cause slipping, harsh or delayed shifts, and in severe cases internal clutch damage, so it should be addressed promptly. On Subaru specifically, this code is documented across 6 models.
What causes P0868 on Subaru vehicles?▼
Common causes on Subaru: Low transmission fluid level, Worn or stuck-open pressure control solenoid, Internal leak (worn seals, gaskets, or valve body), Faulty transmission fluid pressure sensor, Clogged transmission filter. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0868 on a Subaru?▼
Repair costs on Subaru range from $200 to $9,000, depending on the specific model and root cause.
Which Subaru models have P0868 documented?▼
Au7o has documented P0868 on 6 Subaru models: Ascent, Crosstrek, Forester, Impreza, Legacy, Outback.