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2018 HONDA ACCORD
1.5L I4 Turbo•FWD•CVT•gas•turbo
6 active safety recalls on this vehicle — view recalls
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Repairs402Labor502Torque3379Fluid7DTC1924Battery1Maintenance0Recalls6
P0885high severityPowertrain

TCM Power Relay Control Circuit/Open

on 2018 Honda Accord 1.5L I4 Turbo · FWD

What this code means

The control circuit for the TCM power relay is open or not functioning. The TCM cannot properly command its power relay.

Symptoms

  • Transmission does not shift
  • Warning light on
  • No power to transmission control system

Common causes

  • Faulty TCM power relay
  • Open in relay control wiring
  • Corroded relay socket
  • Faulty transmission control module

Diagnostic steps

  1. Test the TCM power relay operation
  2. Check control circuit continuity
  3. Inspect relay socket and connectors
  4. Repair open wiring or replace relay
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