Skip the auto shop - Our mechanics make house calls

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.

A: Hi! A P0700 code stored in the powertrain c...

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Where is the location of the starter on this 2.2 engine?

The starter is located on the backside of the engine, between the engine and firewall. It is under the intake manifold on the driver side of the engine. If you would feel more comfortable having an expert take care of...

Q: A/C makes loud humming sound

The blower fan motor has something caught in it or the air filter is not in position and hitting the blower fan. Have the person or shop that did the work fix it. The filter may be out of position...

Q: Misfiring

Th wrench light is your car' check engine light indicating that it needs to be serviced. Engine misfires can be caused by many different problems and are generally caused by either a spark or fuel issue or in some cases,...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...