Torque Converter Clutch Solenoid: REPLACEMENT COST The same Diagnostic Trouble Codes listed above apply.
2005 CHEVY COBALT SHIFT SOLENOID CODE
This type of solenoid failure will set a Diagnostic Trouble Code causing the Check Engine Light to illuminate. With the transmission unable to slip, the engine will stall when the vehicle comes to a stop. When the solenoid is open, the engine is locked to the transmission so there is no transmission slip. The symptoms are different a torque converter clutch solenoid that fails in the open position… The symptoms of a torque converter clutch solenoid that fails while in the open position are quite different from a solenoid that fails in the closed position, as described above. Vehicle manufacturers may use manufacturer specific DTC codes that are different from the codes shown here.įaulty Transmission Torque Converter Clutch Solenoid: These codes may not apply to all vehicles. P0744 Torque Converter Clutch Circuit IntermittentĭTCs provided above are generic codes that apply to 1996 and newer vehicles. P0743 Torque Converter Clutch Circuit Electrical P0742 Torque Converter Clutch Circuit Stock On P0741 Torque Converter Clutch Circuit Performance or Stuck Off » A problem in the Transmission Control Module (TCM) or Powertrain Control Module (PCM), depending on the vehicle. » A damaged transmission wiring harness, loose connection or open circuit in the system » A faulty Torque Converter Clutch (TCC) Solenoid
P0740 Torque Converter Clutch Circuit Malfunction – CODE DESCRIPTION Any time a transmission overheats, some internal damage occurs.Ī faulty torque converter clutch solenoid normally sets a Diagnostic Trouble Code (DTC), which causes the Check Engine Light to come on.Ī faulty torque converter clutch solenoid will normally set diagnostic trouble code P0740. The harder the engine works the more fuel it consumes. Thus, you have slipping, which causes the engine to work harder. However, if you pay close attention to your gas mileage, you will see an increase in fuel consumption because the engine and transmission are not locking up at highway speeds because the faulty solenoid. With respect to drivability and performance, a malfunctioning torque converter clutch solenoid (one that fails in the closed position) may not be noticeable. The opening and closing of the TCC solenoid valve is controlled by the transmission control module (TCM) or powertrain control module (PCM), depending on the vehicle.įaulty Transmission Torque Converter Clutch Solenoid: SYMPTOMS Failed in the Closed Position The fluid pressure that applies and releases the torque converter lockup clutch is controlled by the torque converter clutch solenoid.
To prevent slipping at certain speeds (normally speeds exceeding 37 mph) a lockup clutch located inside the converter locks the engine’s output drive to the transmission’s input shaft to achieve a 1:1 ratio – meaning 100% of the engine’s power is now reaching the transmission. The torque converter is responsible for transmitting the engine’s torque and power to the transmission. Positioned between the rear of the engine and the front of the transmission is the torque converter. Transmission Torque Converter Clutch (TCC) Solenoid: DESCRIPTION
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