P084A: Transmission Fluid Pressure Sensor/Switch 'H' Circuit
Severity: medium
What it means: The transmission computer watches a fluid pressure sensor or switch (labeled 'H'), and P084A means it saw a problem with that sensor's circuit. On some Mitsubishi CVTs, Mitsubishi lists it among codes that can set when the belt slips and metal powder builds up.
Safe to drive? Drive gently to a shop. If shifting is harsh, the car surges or it goes into limp mode, have it checked soon.
Common symptoms
- Check engine or transmission warning light
- Harsh or delayed shifting, shudder or surge
- Limp mode on some vehicles
Likely causes, ranked
- Faulty pressure sensor or switchShop
- Wiring or connector problemShop
- Low or contaminated transmission fluidShop
- Internal transmission problem (for example CVT belt slip)Shop
Advertisement
Vehicle-specific notes
- 2018–2024 Mitsubishi Eclipse Cross: Mitsubishi bulletin TSB-20-23-001REV3 lists this code among those that can set when a CVT-8 with slow hydraulic pressure response lets the belt slip and shed metal powder, causing shudder or surge. Read the full answer · Source
DIY or shop?
Shop. Transmission pressure testing and CVT fluid service need the right tools and fluid.
Before you replace parts
- Check the transmission fluid level and condition (CVTs need the exact fluid).
- Inspect the sensor connector and wiring.
- Check for bulletins for your VIN, such as Mitsubishi TSB-20-23-001 on CVT-8 models.
Safety / mechanic note
Verify with a mechanic. A transmission that surges or slips can leave you without power in traffic.
Advertisement