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P0891high severityPowertrain

TCM Power Relay Sense Circuit Signal Stuck Off

on 2017 Maserati Levante 3.0L V6 Twin Turbo · AWD

What this code means

The transmission control module sees the power relay sense signal stuck in the off state. The relay is not energizing when commanded on.

Symptoms

  • Transmission warning light on
  • Transmission enters limp mode
  • No shifting response

Common causes

  • Faulty TCM power relay
  • Open circuit in sense wiring
  • Corroded or loose connectors
  • Faulty transmission control module

Diagnostic steps

  1. Scan for related transmission codes
  2. Test relay energizing operation
  3. Check sense circuit for open
  4. Inspect connectors and wiring

Other Powertrain codes on this vehicle

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