AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Generic - U1845

U1845 Code - Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module

- Code Popularity: 897 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC U1845?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Power Inverter Module
  • Power Inverter Module harness is open or shorted
  • Power Inverter Module circuit poor electrical connection
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC U1845?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for U1845 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1845 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code U1845 Description

The Drive Motor Control Modules and the Hybrid/EV Powertrain Control Module 1 are all internal to the Power Inverter Module. The Drive Motor Control Modules communicate only with the Hybrid/EV Powertrain Control Module 1 which sends out diagnostic trouble code information to other devices regarding the Drive Motor Control Modules. All circuits to the Hybrid/EV Powertrain Control Module 1 and Drive Motor Control Modules are also internal to the Power Inverter Module and replaced as a single component.
Communication diagnostics for the serial data, including device power and ground as well as the wakeup circuits for Drive Motor Control Modules and the Hybrid/EV Powertrain Control Module 1 are all diagnosed from external sources only to the Power Inverter Module connector because any circuit fault condition within the Power Inverter Module will cause a complete replacement.
The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U1845 - Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module - AutoCodes.com
U1845 Code - Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module

Need More Information on the Code?

Need more information on how to fix the U1845 code? Get Access to Factory Service Manuals

Information for Specific Makes

  • U1845 Buick Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module
  • U1845 Cadillac Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module
  • U1845 Chevrolet Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module
  • U1845 GMC Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module

Need Help with the Code?

Get the U1845 code diagnosed by a professional: Find a repair shop in your area

Code U1845 comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the U1845 code? Have you replaced any parts?
Any information is appreciated. Thanks