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2024 LEXUS NX 250
2.5L I4•AWD•AUTOMATIC•gas
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Repairs0Labor477Torque2120Fluid10DTC1942Battery1Maintenance0Recalls0
P0883moderate severityPowertrain

TCM Power Input Signal High

on 2024 Lexus NX 250 2.5L I4 · AWD

What this code means

The TCM is seeing a power input voltage that is too high. This can be caused by a wiring short or charging system fault.

Symptoms

  • Harsh or erratic shifts
  • Transmission warning light on
  • Possible limp mode

Common causes

  • Short to voltage in TCM wiring
  • Overcharging alternator
  • Faulty voltage regulator
  • Faulty transmission control module

Diagnostic steps

  1. Measure TCM power input voltage
  2. Check charging system output voltage
  3. Inspect wiring for shorts to power
  4. Replace TCM if supply is correct
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