Error code

OBD2 P0816

OBD2P0816
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Downshift Switch Circuit.

Severity

moderateCan drive but may experience shifting issues.

Summary

P0816 indicates an issue with the downshift switch circuit, which is part of the transmission control system.

Common Causes

  • Poor wiring connection
  • Faulty downshift switch
  • ECM/PCM or TCM malfunction

Fixes

  • Repair or replace the faulty component (downshift switch, wiring, ECM/PCM/TCM)

FAQ

What does P0816 mean?

P0816 indicates a malfunction in the downshift switch circuit of your vehicle's transmission control system.

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.