Chrysler P1D20: Multi Module Handshake Failure
Is your scanner showing Chrysler P1D20?
No worries. We'll show you what it means and how to deal with it.
Chrysler P1D20: Multi Module Handshake Failure
OVERVIEWWhat Does The Chrysler P1D20 Code Mean?
The purpose of the diagnostic is to monitor the question-answer Controller Area Network (CAN) communication between the shifter and Transmission Control Module (TCM) by comparing the shifter response to the expected value in the TCM software. The TCM sends two randomly generated values to the shifter and the shifter is expected to answer with a value calculated based upon these two random numbers.
The TCM commands the shifter to reset if one of the following conditions occurs:No answer received within a calibrated amount of time.Received answer is incorrect and is the same as the previous answer.Received answer is incorrect and is not the same as the previous answer.
What Are The Potential Causes Of The Chrysler P1D20 Code?
- CONTROLLER AREA NETWORK (CAN) BUS CIRCUITS OPEN OR SHORTED
- ELECTRONIC SHIFT MODULE (ESM)
- TRANSMISSION CONTROL MODULE (TCM)
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Chrysler TCM
>>> Genuine Chrysler 68091342AA Transmission Shifter
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
Chrysler P1D20, DTCDECODE.
