Check Engine Light P0740. Car stalls when starting (occasionally), and the transmission slips when stopped.

P0740 is the torque converter malfunction code. The converter is in between the engine and transmission. The fluid that you are seeing is transmission fluid. It needs to go to a mechanic to narrow it down from there.

I think you need a new transmission.

P0740 - Torque Converter Clutch Malfunctionhttp://engine-codes.com/p0740.htmlForum CodePossible causes- Low transmission fluid level
- Dirty transmission fluid
- Faulty torque converter clutch solenoid valve
- Torque converter clutch solenoid valve harness or connectors
- Torque converter clutch solenoid valve circuit is open or shorted When is the code detected?Diagnostic trouble code P0740 is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.

P0700 TCM has requested PCM to run on Check engine light to alert to a fault in the automatic transmission.

CODE PO744 AUTOMATIC TRANSMISSION TORQUE CONVERTER CLUTCH SOLENOID VALVE FAULT. POSSIBLE CAUSE FAULTY TCC SOLENOID.CHECK TCC SOLENOID WIRING FOR DAMAGE.OR YOU COULD HAVE FAULTY TCM OR ECM. IF THE TCC SOLENOID IS FAULTY YOUR ENGINE WILL STALL OUT AT A RED LIGHT OR STOP SIGN.YOUR ENGINE WILL STALL OUT AT EVERY STOP THAT WOULD BE SIGN FAULTY TCC SOLENOID.IF ENGINE DONT STALL OUT THE TCC SOLENOID COULD COULD BE STUCK OPEN, IF YOUR TORQUE CONVERTER FAULTY IT WILL CAUSE PREMATURE LOCKUP STALLING OUT THE ENGINE.

oxygen sensor

check and see if the code stored is the I A C control that's what controls the idle go to any parts store they will scan it for free

Most likely problem is a split trasmission sump filter.

unfortunately it is. Contact your local dealership to see if it may still be covered under a warranty or not.

Customer Concern: The check engine light is on with the trouble code P0740 present. Tests/Procedures: 1. Test drive the vehicle and watch the tachometer. See if the automatic transmission locks up. If unable to see the RPM change, and the Engine Control Module (ECM) is turning on the lockup solenoids, then the problem has to be internal to the transmission. The transmission has an extended warranty from Honda for 7 years or 100,000 miles. Potential Causes: Automatic Transmission
Lock-Up Solenoid
Torque Converter
Tech Tips: TSB #02-062 Diagnostic Codes: P0740

I had the same problem with my dodge neon. Its your transmission slipping. My car had to have all the transmission flushed and it helped alot, but the longer you let it go, the damage could be permanent.

Replace the camshaft sensor, the issue will go away.