P2820 on Acura: How to Diagnose & Fix
Pressure Control Solenoid "J" Performance or Stuck Off
1 Acura model · 1 documented issue · 1 critical
P2820 on Acura by model: symptoms, diagnosis and fix
The ZF 9HP 9-speed automatic introduced on the 2016 MDX suffers from documented hesitation, harsh shifts, lurching, and unexpected downshifts/deceleration. Drivers report the vehicle hesitating from a stop, banging into gear, or briefly losing power. Software miscommunication between TCM, ECM and throttle control is the alleged root cause; a class action was filed alleging Honda knew of the defect from 2015.
Common Symptoms
- Hesitation from a stop
- Hard or banging shifts
- Unexpected downshift while cruising
- Brief loss of power
- Lurching at low speed
How to Fix
Have dealer apply latest TCM/PGM-FI software updates first (covered by powertrain warranty). If symptoms persist, request fluid replacement and dealer escalation; document everything for lemon-law/class-action relief. Avoid jerky throttle inputs while cold.
Sources for this issue (3)
P2820 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P2820 mean on a Acura?
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 Acura it is documented across 1 model: MDX.
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 on a Acura?
Repair costs vary widely with the root cause and Acura model; each issue on this page carries its own estimate where one is published.
Looking for P2820 on a different make?
View P2820 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.