AutoCodes – Cadillac – U183B Cadillac

U183B Cadillac 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 Cadillac 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 600

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 Cadillac 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 Cadillac - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Transmission Control Module - AutoCodes.com — U183B Cadillac 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 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

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

- Common symptoms may include transmission shifting issues, poor acceleration, and the illumination of the check engine light.

2. What are the possible causes of the U183B code in a Cadillac?

- The U183B code can be triggered by issues such as a faulty auxiliary transmission fluid pump control module, a communication error between modules, or damaged wiring.

3. How can I diagnose the U183B code in my Cadillac?

- Diagnosing the U183B code typically involves using an OBDII scanner to retrieve the code, checking for any other related codes, and performing a thorough inspection of the transmission control system.

4. What are some repair tips for fixing the U183B code in a Cadillac?

- Repair tips may include checking and repairing any damaged wiring, replacing the auxiliary transmission fluid pump control module if necessary, and ensuring proper communication between modules.

5. Can I drive my Cadillac with the U183B code present?

- It is not recommended to drive your Cadillac with the U183B code present, as it can lead to further transmission damage and potential safety hazards.

6. How much does it typically cost to repair the U183B code in a Cadillac?

- The cost of repairing the U183B code can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is advisable to consult a professional for an accurate estimate.

7. Are there any preventive measures to avoid the U183B code in a Cadillac?

- Regular maintenance of the transmission system, including checking for leaks, ensuring proper fluid levels, and addressing any warning signs promptly, can help prevent issues leading to the U183B code.

8. Can I reset the U183B code in my Cadillac without repairing the underlying issue?

- While you can clear the code temporarily using an OBDII scanner, it is crucial to address the root cause to prevent the code from reappearing and causing potential transmission problems.

9. Is the U183B code specific to Cadillac vehicles only?

- The U183B code related to the Auxiliary Transmission Fluid Pump Control Module lost communication with the Transmission Control Module may be specific to Cadillac vehicles or vehicles using similar control modules and systems.

10. How urgent is it to address the U183B code in a Cadillac?

- It is recommended to address the U183B code promptly to prevent further transmission damage, ensure safe driving conditions, and maintain the overall performance of the vehicle.