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Home >> Acura >> 2021 >> TLX Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - DTC Diagnostics >> Troubleshooting >> DTC Troubleshooting: P2820, P2821 >> Confirmation Procedure

Confirmation Procedure

1. Raise the vehicle on a lift. Make sure it is securely supported, and allow all four wheels to rotate freely.

2. Test-drive under these conditions:

DTC Test Condition
P2820
  • Start the engine, disable the VSA .
  • Run the vehicle in D position/mode, then slow down and stop the vehicle.
  • While pressing the brake pedal, shift the transmission to R position/mode.
P2821
  • Start the engine, disable the VSA , and warm it up until the HDS [ATF Temperature] reaches 32 deg.F (0 deg.C) or more.
  • Run the vehicle in 2nd gear with steady cruising with the HDS [APP Sensor A Voltage] 1.4 V or lower.