U183C Code - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus
Quick Answer
The diagnostic trouble code (DTC) U183C indicates that the Auxiliary Transmission Fluid Pump Control Module has lost communication with the Hybrid/EV Powertrain Control Module 2 on the Powertrain Expansion Communication Bus. Common causes include Electrical faults in the communication system, Wiring harness issues or connection problems, Faulty Auxiliary Transmission Fluid Pump Control Module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U183C indicates Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus.
- Common causes
- Common causes include Electrical faults in the communication system, Wiring harness issues or connection problems, Faulty Auxiliary Transmission Fluid Pump Control Module.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code U183C Description
The diagnostic trouble code (DTC) U183C indicates that the Auxiliary Transmission Fluid Pump Control Module has lost communication with the Hybrid/EV Powertrain Control Module 2 on the Powertrain Expansion Communication Bus. In hybrid and electric vehicles, the transmission fluid pump plays a crucial role in maintaining proper fluid pressure in the transmission system. The Powertrain Control Module (PCM) 2 is responsible for managing various functions related to the hybrid or electric powertrain, such as controlling the motor/generator, battery pack, and other components.
Common Causes of U183C
- Electrical faults in the communication system
- Wiring harness issues or connection problems
- Faulty Auxiliary Transmission Fluid Pump Control Module
- Malfunctioning Hybrid/EV Powertrain Control Module 2
- Software glitches or communication protocol errors
Symptoms of U183C
- Check engine light illumination
- Transmission shifting erratically or harshly
- Loss of power or reduced acceleration
- Poor fuel efficiency
- Transmission warning light on the dashboard
How to Fix U183C
- Diagnose the specific cause of the communication error using a scan tool to retrieve fault codes and data from the affected modules.
- Inspect the wiring harness and connections for any damage, corrosion, or loose connections. Repair or replace as needed.
- Test the Auxiliary Transmission Fluid Pump Control Module and Hybrid/EV Powertrain Control Module 2 for proper functionality. Replace any faulty modules.
- Perform a software update or reprogramming of the modules to address any communication protocol errors.
- Clear the fault codes and perform a road test to verify that the communication error has been resolved.
Cost to Fix U183C
The typical repair costs for addressing a U183C code can vary depending on the specific cause of the communication error. On average, the repair costs for this issue can range from $200 to $600, including parts and labor. However, it's important to note that the actual cost may be higher or lower based on factors such as the vehicle make and model, the location of the repair shop, and the extent of the repairs needed. It's recommended to consult with a trusted mechanic or dealership for a more accurate cost estimate based on your particular situation. Additionally, labor rates at auto repair shops can vary widely, with hourly rates typically ranging from $80 to $150.
Need more information about the U183C code?
Need more information on how to fix the U183C code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U183C code diagnosed by a professional: Find a repair shop in your area
Code U183C Information for Specific Makes
- U183C Buick — Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus
- U183C Cadillac — Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus
- U183C Chevrolet — Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus
- U183C GMC — Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus
Frequently Asked Questions about U183C Code
What does the OBDII code U183C indicate?
The code U183C indicates that there is a loss of communication between the auxiliary transmission fluid pump control module and the hybrid/EV powertrain control module 2 on the powertrain expansion communication bus.
What are the common symptoms associated with the U183C code?
Common symptoms may include warning lights on the dashboard, erratic transmission behavior, reduced power or performance, and potential overheating of the transmission.
What could cause the U183C code to trigger?
Possible causes include faulty wiring or connections in the communication circuit, a malfunctioning auxiliary transmission fluid pump control module, or issues with the hybrid/EV powertrain control module itself.
How can I diagnose the U183C code?
To diagnose the U183C code, use an OBDII scanner to confirm the code, check for additional related codes, inspect wiring and connectors for damage, and test the affected modules for proper operation.
What are some common repair solutions for the U183C code?
Repairs may involve repairing or replacing damaged wiring or connectors, replacing the auxiliary transmission fluid pump control module, or reprogramming or replacing the hybrid/EV powertrain control module.
Can I continue driving my vehicle if the U183C code is present?
It is not recommended to continue driving your vehicle with the U183C code present, as it can lead to transmission issues and potential damage if the problem is not addressed.
Is it possible to reset the code without fixing the underlying issue?
Yes, you can reset the code using an OBDII scanner, but if the underlying communication issue is not resolved, the code will likely reappear.
How can I prevent the U183C code from occurring in the future?
To prevent the U183C code, regularly inspect and maintain the wiring and connectors in the transmission and powertrain systems, and ensure that software updates for the vehicle's modules are applied as needed.
Should I consult a professional mechanic for the U183C code?
Yes, consulting a professional mechanic is advisable, especially if you are not experienced with automotive diagnostics, as they can properly diagnose and repair the issue effectively.
Discuss the causes and fixes for U183C OBDII Code
Code U183C comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.