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mickf

OBD Code P0740

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

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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

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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,

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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