P2820: Pressure Control Solenoid "J" Performance or Stuck Off
2 vehicles · 2 makes
Most Reported On
P2820 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2016-2019 Acura MDX, and 2019-2020 Subaru Ascent.
Common Causes
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P2820.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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FAQ
What does P2820 mean?
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.
What are the most common causes of P2820?
The most common causes of P2820 are: 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. The specific cause varies by vehicle.
How much does it cost to fix P2820?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P2820?
Au7o has documented P2820 across 2 vehicle models from 2 manufacturers: Acura, Subaru.
Sources (6)
- articleHonda Class Action Alleges Transmission Defect (2016-2019 Acura MDX)
- articleAcura RDX, MDX and TLX Transmission and Infotainment System Defects
- Forum2017 MDX Advance sluggish & jerky ZF9 Transmission
- RecallNHTSA Recall 21V-955 / WRK-21 CVT Chain Guide Breakage
- ForumRECALL: WRK21 / NHTSA 21V955000 - Ascent CVT Chain Guide Breakage
- articleSubaru Ascent CVT Lawsuit Settlement Information
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.