Q: P0700 Transmission Control System MIL Request

asked by on

The truck was starting to run a little shaky thought it may need an alignment. Set up that appt but in mean time detailed engine compartment. Started truck after detail everything seemed fine. Next morning jumped into go to work and it was very shaky and the engine light was flashing. I immediately turned off the truck. It needed some coolant and oil I added that seemed to run a bit better but I didn't drive it more than 5 feet. Engine light was off then came back on plugged in my scanner and got the P0700 code. Not sure how serious that is? And what steps I should be taking next to prevent from any further damage.

My car has 120000 miles.
My car has an automatic transmission.

Hi! A P0700 code stored in the powertrain control module (PCM) indicates that there is a code stored in the transmission control module (TCM) that can be accessed by looking into the TCM with an appropriate scan tool. Having the actual transmission code may provide more help for the diagnosis.

If "detailed the engine compartment", means washed under the hood with water spray, then you may have gotten water into some electrical connections. I suggest starting with an aerosol spray can of Electrical Terminal Contact Cleaner. Key off and out of ignition. Disconnect negative battery cable. Disconnect connectors to PCM, TCM, and any other control modules (like ignition) that may have gotten wet. Inspect terminals closely. Spray with contact cleaner. Allow to dry before reconnecting.

Some Dodges with a P0700 have needed a new TCM.

Flashing MIL light means engine is misfiring severely. You were correct to shut it off. Water in ignition coils, wires, spark plug boots could’ve caused it.

I’d suggest having your car looked at by a qualified technician, such as one from YourMechanic, to diagnose your trouble code firsthand and help you make the necessary repairs. Best of luck.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. P0700 Transmission Control System MIL Request

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: the car has been sitting for a while it goes in gear you can feel and hear it but it won't move

Hey. The most likely cause is the transmission internal clutches are bad or a clutch drum band is seized or bad. Have a transmission mechanic check the transmission pressures to diagnose the problem. Before this make sure the transmission fluid...

Q: Long cranking

There are many causes of hard starting but illustrative ones are a faulty engine coolant temperature switch (sensor), worn spark plugs, inadequate fuel delivery or pressure (caused by other than fuel filter in your case), and contaminated or old gasoline....

Q: Q: Multiple cylinder misfire

Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...