TWO CODES P0740, P0700. THE CAR RUNS GREAT WITH NO PROBLEMS RIGHT NOW. i JUST RECENTLY HAD THE ENGINE REPLACED. SHOULD THEIR BE TRANSMISSION FAILURE WITH THE CAR RUNNING GOOD. I ASKED THE USUAL QUESTIONS AT THE DEALER IS THE TRANSMISSION FLUID DIRTY OR LOW. THEY WENT RIGHT TO NEW TRANSMISSION OR REMANUFACTURED. COULD IT BE THE CONNECTORS
P0740 is the Torque Converter. It is actually attached to the transmission. When I was getting code PO740, I had to have the torque converter replaced. PO700 is the Transmission Control Module. This is not inside the transmission but rather part of the control side of the transmission. You did not say how many miles you have on it, You did not say whether you have ever replaced the transmission fluid before, I do not trust mechanics, I learned how to work on my vehicle myself. I cannot replace a transmission or a motor but, I have 330K miles on my Pentastar 3.6L Engine and original transmission, You must change your transmission fluid but if you went over 100K miles and never replaced it, you have more than likely caused the transmission to have internal failure, Some people do not believe in replacing the transmission fluid. The reason you must change it, is because the fluid breaks down and cannot cool the transmission down. After you change it at 100K , I myself change mine then after another 50K then after another 20K and I change it if I notice even the slightest slip in the transmission,
SOURCE: 2000 Honda Accord Check Engine light on p0740
YOU HAVE A TORQUE CONVERTER PROBLEM. TORQUE CONVERTER CONTROL CIRCUIT MALFUNCTION CODES CAN COME FROM ELECTRICLE TO INTERNAL MALFUNCTION. IF YOU START EXPERIENCING A HARD SHIFT OR FREE SPIN TO HARD SHIFT DON'T BE SURPRISED. TRY CHANGING FLUID. THIS MAY HELP. HONDA WOULD HAVE REPLACED TRANS IF UNDER 105 k FOR FREE. IF YOU HAVE TO REPLACE TRANS. BUY ONE FROM HONDA, 3 YR WARRANTY AND AS CHEAP AS A REBUILT TRANS. HAVE A QUALIFIED PERSON INSTALL, YOU WILL SAVE ABOUT $500 DOING IT THIS WAY. GOOD LUCK
SOURCE: check engine light on 2005 town and country 3.3
(DTC) CODE # P0700....Transmission Control System (MIL Request)
Translation: Transmission Control Module (TCM) Malfunction or Failure.
P0700 Information Code
The Transaxle Control Module (TCM) monitors the malfunction of sensors and actuators relating to transaxle control. If any malfunction is detected, the TCM informs the PCM by sending a signal (P0700 code). P0700 means that a code has been set in the TCM.
This code is for information ONLY. If this code is present, check for transaxle codes.
P1776:
Solenoid Switch Valve Latched in Low/Reverse Position.
The TCM monitors the L/R solenoid to ensure that the fluid transfer happens. It uses a Pressure switch to verify this. Usually this code is set by a switch that is stuck or a solenoid that is not mechanically operating.
A transmission shop would be better suited for this type of work.
SOURCE: 2005 PT Cruiser P0700, P0720, P0731 stuck in low and Speedometer
YOU HAVE A DEFECTIVE OUTPUT SPEED SENSOR ON TRANSMISSION..ABOUT 40 BUCKS,DEALER PART..SCREWS INTO FRONT OF TRANS..NEAR LEFT INNER FENDER,YOU MIGHT WANT A MECHANIC TO REPLACE..
SOURCE: Transmission Service Required message
I got Volvo S80 2.4 year 2001 there is a message on the screen Transmission Service Required can you tell me what does it mean?
SOURCE: 2002 chrysler 300m error codes p0740 and p0700
700 tells you that there has been a "transmission control circuit malfunction", and 740 basically pinpoints the possible culprit, which is "Torque converter clutch control circuit malfunction". If you don't notice any difference in the way the transmission is shifting, especially when you are at cruising speed on highway, or you've basically reached the speed your going to travel at, and are no longer accelerating, your converter normally goes into "lock-up" and your engine RPM's will drop by approx, 200-300 RPM's. When your driving it basically feels like transmission shifted again, slightly. If all feels well, it may just be a one time thing, but being how transmissions are somewhat temperamental, as well as expensive to repair when big problems occur, I would certainly consider getting it in to a dealer for diagnosis at least, and see what they come up with, as it may only be a bad switch, or bad, corroded connection causing the codes. Remember, if it sounds like an expensive,extensive repair, then simply get all the info, and either stop elsewhere for diagnosis of same problem, (without telling them it's already been diagnosed) and see what second opinion has to say. If in doubt after that, get back to us, with diagnosis results, and we'll be glad to help you decide from there. One thing you may want to consider though, is a transmission service, (oil and filter change) if it hasn't been done in a while, just as a preventative maintenance thing. Changing of oil and filter in those transmissions at regular intervals, is a good way of extending the life of them. I recommend the new ,Autopar ATF4 transmission oil, which is more expensive, but guaranteed to last for lifetime under normal driving conditions. Chrysler/Autopar products tend to work better with it, and new filter, although there are many mechanics that will argue that fact, there are just as many mechanics and owners who have seen other oils cause problems, and when they switch to Autopar, those problems disappeared.
Testimonial: "Thanks very much!!! I will have it checked out. I have just had a full service on the car and a new filter etc. installed. "
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