Question about 2004 Opel Zafira 2.0

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P1740 code - 2004 Opel Zafira 2.0

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Hi ive heard of this confliction before ,turned out to be a faulty gearbox ECU.

Posted on Sep 16, 2013

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Hi there:
DTC P1740 - TCC or OD Solenoid Performance

Posted on Apr 30, 2013

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P1740 trouble code on a 2001 Dodge Ram 1500


There is one solenoid assy with two solenoids on it. One for the TCC and other for OD. in my experience, P1740 is caused by a couple of things. The torque converters are a subject of trouble for one - I always replace them - the other are the input sealing rings on the input shaft. Older designs leak pressure. Always replace with the plastic - **** end type which is the update today. P1740 has nothing to with the governor solenoid or sensor

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Error codes


Her is the definition and a list of possiable causes.


Code P1740-Torque converter clutch did not lock up when the PCM sent the command. Enabling conditions: No engine or transmissions codes are present, vehicle speed was under 70 MPH, TPS was under 33% open. When the PCM commanded the torque converter to lock, no change was detected in engine speed. Blocking action: This code can block the following monitors: none.
Testing: Check torque converter solenoid for proper operation.
P1740 TCC O/D SOL PERFORMANCE (GAS)
Theory of Operation
The Torque Converter Clutch (TCC) Solenoid is used to engage the TCC which improves fuel economy.
When Monitored
The Torque Convertor Clutch (TCC) and Overdrive Clutch (OD) will be tested each time the PCM requests TCC engagement in 3rd gear and OD.
Set Condition
The DTC will set if the expected RPM drop is not achieved while attempting to engage TCC or OD. This indicates a malfunctioning torque convertor or overdrive clutch.
Possible Causes
* ENGINE DTCS PRESENT
* TRANSMISSION DTCS PRESENT
* TRANSMISSION TEMPERATURE TOO COLD
* OIL PAN CONTAINS EXCESSIVE DEBRIS
* 3-4 SHIFT SOLENOID
* SHAFT OR SEAL DAMAGE
* TCC SOLENOID
* TORQUE CONVERTER

Sep 25, 2008 | 2005 Dodge Ram 3500

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