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2010 LEXUS RX 350
3.5L V6•AWD•AUTOMATIC•gas
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Repairs0Labor484Torque2153Fluid10DTC1912Battery1Maintenance0Recalls0
P0726moderate severityPowertrain

Engine Speed Input Circuit Range/Performance

on 2010 Lexus RX 350 3.5L V6 · AWD

What this code means

The engine speed signal at the transmission controller is present but out of the expected range. Shift and lockup timing depend on an accurate RPM value.

Symptoms

  • Poor shift quality
  • Torque converter shudder
  • Check engine light on

Common causes

  • Faulty engine speed sensor
  • Signal interference or noise
  • Wiring issue to TCM
  • Faulty PCM/TCM

Diagnostic steps

  1. Retrieve codes and freeze frame
  2. Compare RPM signal against actual engine speed
  3. Inspect wiring for damage or noise sources
  4. Replace sensor if reading is off
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