AutoCodes – Chevrolet – U183B Chevrolet

U183B Chevrolet Code - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Transmission Control Module

Quick Answer

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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: U183B Chevrolet indicates Auxiliary Transmission Fluid Pump Control Module Lost Communication With Transmission Control Module.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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 481

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 U183B 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 U183B Chevrolet - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Transmission Control Module - AutoCodes.com — U183B Chevrolet Code - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Transmission Control Module

What does this mean?

What are the Possible Causes of the DTC U183B Chevrolet?

Faulty Transmission Control Module (TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC U183B 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 U183B 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 U183B Chevrolet Code

1. What are the common symptoms of OBDII code U183B in a Chevrolet related to Auxiliary Transmission Fluid Pump Control Module communication loss?

- Common symptoms may include transmission shifting issues, harsh gear changes, illuminated warning lights on the dashboard, and reduced overall vehicle performance.

2. What could cause the Auxiliary Transmission Fluid Pump Control Module to lose communication with the Transmission Control Module in a Chevrolet?

- Possible causes include loose or damaged wiring connections, a faulty transmission control module, issues with the auxiliary pump control module, or software malfunctions.

3. How can I diagnose the root cause of OBDII code U183B in my Chevrolet?

- A thorough diagnostic scan using an OBDII scanner can help pinpoint the exact cause of the communication loss between modules. Checking for loose connections and performing a visual inspection of related components is also recommended.

4. Is it safe to continue driving my Chevrolet with OBDII code U183B present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further transmission damage and potential safety hazards. It is best to address the issue promptly.

5. What are some repair tips for resolving OBDII code U183B in a Chevrolet?

- Repair tips may include checking and repairing any damaged wiring, ensuring all connections are secure, resetting the fault codes after making repairs, and performing a test drive to confirm the issue is resolved.

6. Can a DIY enthusiast fix OBDII code U183B in a Chevrolet at home?

- While some basic troubleshooting steps can be performed at home, resolving this code often requires advanced diagnostic tools and expertise. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

7. How much does it typically cost to fix OBDII code U183B in a Chevrolet at a repair shop?

- Repair costs can vary depending on the exact cause of the communication loss. On average, expect to pay anywhere from $200 to $500 for diagnosis, parts, and labor.

8. Will resetting the OBDII code U183B clear the issue permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear. It is crucial to diagnose and fix the root cause to prevent future problems.

9. Are there any recalls or technical service bulletins related to OBDII code U183B in Chevrolet vehicles?

- It is advisable to check with a Chevrolet dealership or online resources for any recalls or technical service bulletins related to this specific OBDII code in your vehicle model and year.

10. How important is it to address OBDII code U183B promptly in a Chevrolet?

- It is crucial to address this code promptly to prevent potential transmission damage, ensure vehicle safety, and maintain optimal performance. Ignoring the issue can lead to more severe problems down the line.