P0700 P1776 Chrysler Town & Country Dodge Caravan Don’t Panic!

HughesTech Labs:

Our Engineers have found another cause for the Chrysler Mini-Vans (Dodge, Caravan, & Grand Caravan) to throw Engine Trouble Codes: P0700 P1776
The Code P0700 is from the Transmission & P1776 Reports Stuck throttle Body Valve in reverse
These two (2) Codes will put your transmission in the “Chrysler Get Me Home” Mode.
When the Transmission is in this Mode, Fuel Usage is off the chart, Transmission will not shift and you can only do about 40 Mph Max!

Don’t Panic, take the KISS approach (Keep It Simple Stupid) by following the KISS method, you can save yourself thousands of dollars!

This problem may be present in other Chrysler Models as well but we will stay focused on the Mini-Van family for now.
The transmission does not have a temperature sensor, Chrysler uses some Computer Calculation using
the Cooling System’s temperature Sensors to throw the Transmission in Limp Mode, Get Me Home Mode etc.

The key here is Cooling System!

Here is a problem discovered in the Dodge Mini-Van:

The Temperature Gauge located in the Dash reports Engine Temperature Normal (just below the halfway mark). Really? After closer inspection, our team noticed that there was no circulation of engine coolant within the Radiator. Ok great, so this means one (1) of two (2) things a bad Water Pump or a Bad Thermostat.

So we took the KISS approach and checked the Thermostat first and that was the problem! It was stuck closed! Never opened at all! So the Temperature Gauge in the dash was wrong!

I forgot to mention this Caravan was throwing the Codes: P0700 P1776
After replacing the Thermostat at a cost of $14 at the local Auto Parts Store, and verifying that the Coolant now had circulation through the Radiator once the Engine Temperature reached 200 degrees and the Thermostat opened.

Problem solved! Mini-Van works great!

I know of People that have had these two codes and have spent thousands of dollars for a transmission overhaul. That’s funny it’s not the Transmission causing these codes so how do you fix a problem in a Transmission for Thousands of Dollars when it is a $14 Coolant Thermostat?

Do yourself a big favor check your cooling system first before having anyone touch your Transmission!

I hope this post saves People from being taken on costly transmission work!