LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2006 >> MPV ES >> Repair and Diagnosis >> Transmission >> Automatic Trans >> On-Board Diagnostic [Automatic Transaxle) >> DTC P0740 >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0740: Notes

DTC P0740 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0740 Torque converter clutch (TCC) system malfunction
DETECTION CONDITION 
  • RPM difference between crankshaft (engine speed signal) and reverse clutch drum (input/turbine speed sensor signal) exceeds the pre-programmed value.

Diagnostic support note: 

  • This is continuous monitor (CCM).
  • MIL illuminates if TCM detects the above malfunction conditions in two consecutive drive cycles.
  • PENDING CODE is available.
  • FREEZE FRAME DATA is available.
  • O/D OFF indicator light does not flash.
  • DTC is stored in TCM memory.
POSSIBLE CAUSE 
  • Low ATF level
  • Deteriorated ATF
  • Stuck TCC solenoid valve and pressure control solenoid
  • Low line pressure
  • Oil pump malfunction
  • Stuck control valve
  • Torque convert clutch malfunction
  • TCM malfunction