P2820 on Subaru
Pressure Control Solenoid "J" Performance or Stuck Off
P2820 on Subaru vehicles indicates pressure control solenoid "j" performance or stuck off. Au7o has documented this code across 1 Subaru model — most commonly on Ascent. This code means the transmission control module determined that pressure control solenoid "J" is not responding as commanded or is stuck in the off position. These solenoids regulate the hydraulic pressure that applies the transmission's clutches and bands during shifts. When this solenoid is stuck or underperforming, the result is typically harsh or incorrect shifting, slipping, or limp mode. It can stem from a mechanical sticking of the solenoid/valve as well as fluid or electrical issues.
Common Causes of P2820
- •Stuck or faulty pressure control solenoid "J"
- •Low or contaminated transmission fluid
- •Debris in the valve body sticking the solenoid
- •Internal valve body wear/fault
- •Wiring or connector problems to the solenoid
- •Faulty transmission control module
P2820 on Subaru by Model
Subaru Ascent(1 issue)
- TR690 CVT Chain Slip and Chain Guide Breakage (Recall WRK-21 / NHTSA 21V-955)2019-2020
A TCU programming error allows the Lineartronic CVT to engage before the drive chain is fully secured, causing chain slippage that fragments the chain guide. Owners report shudder, hesitation, irregular noises and MIL illumination; in worst cases chain breakage causes loss of motive power. This superseded the earlier WUV-07 recall and is the basis for the April 2024 class-action settlement covering 2019-2020 Ascents.
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View P2820 across all makes →Frequently Asked Questions
What does P2820 mean on Subaru?▼
P2820 stands for "Pressure Control Solenoid "J" Performance or Stuck Off." This code means the transmission control module determined that pressure control solenoid "J" is not responding as commanded or is stuck in the off position. These solenoids regulate the hydraulic pressure that applies the transmission's clutches and bands during shifts. When this solenoid is stuck or underperforming, the result is typically harsh or incorrect shifting, slipping, or limp mode. It can stem from a mechanical sticking of the solenoid/valve as well as fluid or electrical issues. On Subaru specifically, this code is documented across 1 model.
What causes P2820 on Subaru vehicles?▼
Common causes on Subaru: Stuck or faulty pressure control solenoid "J", Low or contaminated transmission fluid, Debris in the valve body sticking the solenoid, Internal valve body wear/fault, Wiring or connector problems to the solenoid. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2820 on a Subaru?▼
Repair costs vary widely depending on the root cause and specific Subaru model.
Which Subaru models have P2820 documented?▼
Au7o has documented P2820 on 1 Subaru model: Ascent.