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OBD Code P0740

mickf
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mickf Member

mickf

Posted
Posted

Got a P0740 on my '01 Tip Boxster S. Haven't found the right place to get the description. TIA for any help.

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted

Here is what the OBD II manual says for fault P0740:

P0740 - Torque converter clutch, excessive power consumption.

Possible fault cause

- Torque converter clutch not functioning

  • 1 month later...
Izzy Member

Izzy

Posted
Posted

Loren,

Just got the same code in my 99 996 Tip. Would description be the same?

The car seems to run perfect, and the transmission is smooth as silk. I am a bit perplexed. Thank you

Izzy

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Loren Member

Loren

Posted
  • Admin
Posted
Loren,

Just got the same code in my 99 996 Tip. Would description be the same?

The car seems to run perfect, and the transmission is smooth as silk. I am a bit perplexed. Thank you

Izzy

For MY99 Carrera - Tip

P0740 Fault, torque converter clutch - present

Potential causes:

ATF level not OK - ATF supply

Torque converter clutch worn. - Torque converter

Mechanical damage to pressure regulator 4. - Pressure regulator 4 (hydraulic)

Open circuit, short circuit to ground, short circuit - Electrical triggering to pressure regulator 4 to B+. - Hydraulic control unit

Sticking valves.

I would definitely start with fluid level.

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