AutoCodes – Chevrolet – U183C Chevrolet

U183C Chevrolet Code - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus

Quick Answer

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 circuit poor electrical connection. 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 Chevrolet 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 Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 circuit poor electrical connection.
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.

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Code Popularity 632

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U183C Chevrolet Description

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Once the scan tool is connected to the serial data circuit through the Data Link Connector (DLC), the scan tool can be used to monitor each device for diagnostic purposes and to check for Diagnostic Trouble Code (DTC). When the vehicle is ON, each device communicating on the serial data circuit sends a state of health message to ensure that the device is operating properly. When a device stops communicating on the serial data circuit, for example, if the device loses power or ground, the state of health message it normally sends on the serial data circuit disappears. Other devices on the serial data circuit, which expect to receive that state of the health message, detect its absence; those devices in turn set a DTC associated with the loss of the state of health of the non-communicating device. A loss of serial data communications DTC does not represent a failure of the devices that contain the stored DTC. The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U183C Chevrolet - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus - AutoCodes.com — U183C Chevrolet Code - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus

What does this mean?

What are the Possible Causes of the DTC U183C Chevrolet?

Faulty Hybrid/EV Powertrain Control Module 2
Hybrid/EV Powertrain Control Module 2 harness is open or shorted
Hybrid/EV Powertrain Control Module 2 circuit poor electrical connection

How to Fix the DTC U183C Chevrolet?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U183C Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U183C Chevrolet Code

1. What are the common symptoms of OBDII code U183C in a Chevrolet vehicle?

The common symptoms include the check engine light illuminating, transmission issues such as harsh shifting or slipping, and potential loss of communication between the auxiliary transmission fluid pump control module and the hybrid/EV powertrain control module 2.

2. What could cause the OBDII code U183C in a Chevrolet indicating a loss of communication between modules?

Possible causes include a faulty auxiliary transmission fluid pump control module, issues with the hybrid/EV powertrain control module 2, wiring issues, or a communication bus problem within the powertrain expansion system.

3. How can I diagnose the OBDII code U183C in a Chevrolet related to communication loss between modules?

Diagnosis typically involves using a diagnostic scanner to retrieve the specific code, checking for any other related codes or symptoms, inspecting the wiring harness for damage, and performing communication tests between the modules using a scan tool.

4. Can I still drive my Chevrolet with the U183C code present?

It is not recommended to drive the vehicle with the U183C code present, as it can lead to potential transmission issues and affect the overall performance of the vehicle. It is best to address the problem promptly to prevent further damage.

5. Is it possible to repair the U183C code issue in a Chevrolet without professional help?

While some basic troubleshooting steps can be taken, diagnosing and repairing communication issues between modules often require specialized tools and expertise. It is advisable to seek the assistance of a qualified mechanic or dealership for proper diagnosis and repair.

6. How much does it typically cost to repair the U183C code in a Chevrolet?

The cost of repairing the U183C code can vary depending on the underlying cause of the communication loss. Costs may include diagnostic fees, parts replacement, and labor charges. It is recommended to obtain estimates from reputable repair shops for an accurate quote.

7. What are the risks of ignoring the U183C code in a Chevrolet and not addressing it promptly?

Ignoring the U183C code can lead to potential transmission damage, drivability issues, and further communication problems between modules. It is important to address the issue promptly to prevent more extensive and costly repairs in the future.

8. Can a software update fix the U183C code issue in a Chevrolet?

In some cases, a software update provided by the manufacturer may address communication issues between modules and resolve the U183C code. It is advisable to consult with a dealership or authorized service center to determine if a software update is available for your specific vehicle.

9. Are there any recalls or technical service bulletins related to the U183C code in Chevrolet vehicles?

It is recommended to check with the manufacturer or authorized service centers for any recalls or technical service bulletins related to the U183C code in Chevrolet vehicles. These bulletins may provide information on known issues and potential solutions for the problem.

10. How can I prevent the U183C code from occurring in my Chevrolet in the future?

Regular maintenance, including checking for software updates, inspecting wiring harnesses for damage, and addressing any communication issues promptly, can help prevent the recurrence of the U183C code in Chevrolet vehicles.