AutoCodes – Cadillac – U0167 Cadillac

U0167 Cadillac Code - Lost Communication With Immobilizer Control Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Immobilizer Control Module, Immobilizer Control Module harness is open or shorted, Immobilizer 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: U0167 Cadillac indicates Lost Communication With Immobilizer Control Module.
Common causes: Common causes include Faulty Immobilizer Control Module, Immobilizer Control Module harness is open or shorted, Immobilizer 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 628

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 Apr 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0167 Cadillac Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Immobilizer Control Module has not been received.

OBDII Code U0167 Cadillac - Lost Communication With Immobilizer Control Module - AutoCodes.com — U0167 Cadillac Code - Lost Communication With Immobilizer Control Module

What does this mean?

What are the Possible Causes of the DTC U0167 Cadillac?

Faulty Immobilizer Control Module
Immobilizer Control Module harness is open or shorted
Immobilizer Control Module circuit poor electrical connection

How to Fix the DTC U0167 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 U0167 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 U0167 Cadillac Code

1. What are the common symptoms of OBDII code U0167 in a Cadillac related to lost communication with the immobilizer control module?

The common symptoms may include issues with starting the vehicle, the engine stalling, or the vehicle not recognizing the key.

2. What are some possible causes of the OBDII code U0167 in a Cadillac?

Potential causes of this code include a faulty immobilizer control module, damaged wiring or connectors, a weak car battery, or a software glitch.

3. How can I diagnose the OBDII code U0167 in my Cadillac?

Diagnosing this code typically involves using a professional OBDII scanner to retrieve the specific codes, checking the wiring and connectors for any visible damage, and testing the immobilizer control module.

4. Can I still drive my Cadillac if the U0167 code related to the immobilizer control module is present?

It is not recommended to drive the vehicle with this code present, as it may lead to starting issues or engine stalling while driving.

5. How can I repair the OBDII code U0167 in my Cadillac?

Repairing this code usually involves fixing any damaged wiring or connectors, replacing the immobilizer control module if necessary, and ensuring proper communication between the module and other components.

6. Is it possible to reset the U0167 code in a Cadillac without professional help?

While you can attempt to clear the code using an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

7. Will disconnecting the car battery reset the U0167 code in a Cadillac?

Disconnecting the car battery may reset the code temporarily, but it is essential to diagnose and repair the root cause of the communication issue to prevent the code from coming back.

8. How much does it typically cost to repair the U0167 code related to the immobilizer control module in a Cadillac?

The cost of repair can vary depending on the specific issue causing the code, but it may range from a few hundred to a couple thousand dollars, including parts and labor.

9. Can extreme weather conditions affect the occurrence of the U0167 code in a Cadillac?

Extreme weather conditions, especially temperature fluctuations, can potentially impact the communication between the immobilizer control module and other components, leading to the U0167 code.

10. Is it necessary to visit a dealership for OBDII code U0167 repair in a Cadillac, or can it be done by an independent mechanic?

While a dealership may have specialized knowledge and tools for Cadillac vehicles, an experienced independent mechanic can also diagnose and repair the U0167 code effectively, potentially at a lower cost.