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2003 INFINITI FX45
4.5L V8•AWD•AUTOMATIC•gas
9 active safety recalls on this vehicle — view recalls
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Repairs0Labor475Torque2094Fluid7DTC1778Battery1Maintenance0Recalls9
P1701moderate severityPowertrain

Fuel Trim A/T Related

on 2003 Infiniti FX45 4.5L V8 · AWD

What this code means

Fuel trim signal issue between engine and transmission control systems.

Symptoms

  • CEL
  • Poor shift quality
  • Engine flare during shifts
  • Rough transitions

Common causes

  • Communication fault
  • Fuel trim out of range
  • Faulty sensor data
  • Faulty ECM or TCM

Diagnostic steps

  1. Monitor fuel trims
  2. Test communication
  3. Check sensors
  4. Compare ECM/TCM data

Repair notes

Repair communication or sensor issue.

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Other Powertrain codes on this vehicle

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