AutoCodes – Cadillac – U1516 Cadillac

U1516 Cadillac Code - Body Control Module Lost Communication With Battery Sensor Module On LIN Bus

Quick Answer

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. Common causes include Faulty Battery Sensor Module, Battery Sensor Module harness is open or shorted, Battery Sensor 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: U1516 Cadillac indicates Body Control Module Lost Communication With Battery Sensor Module On LIN Bus.
Common causes: Common causes include Faulty Battery Sensor Module, Battery Sensor Module harness is open or shorted, Battery Sensor 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 617

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 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1516 Cadillac Description

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. The serial data is transmitted over a LIN circuit between a master control module and other LIN devices within a particular subsystem. If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message to the Body Control Module (BCM) from the Battery Sensor Module has not been received.

OBDII Code U1516 Cadillac - Body Control Module Lost Communication With Battery Sensor Module On LIN Bus - AutoCodes.com — U1516 Cadillac Code - Body Control Module Lost Communication With Battery Sensor Module On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U1516 Cadillac?

Faulty Battery Sensor Module
Battery Sensor Module harness is open or shorted
Battery Sensor Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC U1516 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 U1516 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 U1516 Cadillac Code

1. What does the OBDII code U1516 mean on a Cadillac?

The U1516 code indicates that the Body Control Module (BCM) has lost communication with the Battery Sensor Module on the LIN (Local Interconnect Network) bus.

2. What are the common symptoms of the U1516 code on a Cadillac?

Symptoms may include warning lights on the dashboard, such as the check engine light or battery light, issues with battery charging, or erratic electrical behavior.

3. What causes the U1516 code to appear?

The code can be triggered by a faulty Battery Sensor Module, damaged wiring or connectors in the LIN bus circuit, software issues in the BCM, or a weak battery.

4. Can a low battery cause the U1516 code?

Yes, a low or failing battery can cause communication errors between the BCM and the Battery Sensor Module, leading to the U1516 code.

5. How is the U1516 code diagnosed?

Diagnosis typically involves scanning for codes with a diagnostic tool, inspecting the LIN bus wiring and connectors, testing the Battery Sensor Module, and checking the battery voltage and condition.

6. Can I drive my Cadillac with the U1516 code?

While the vehicle may still be drivable, itâ€™s not recommended to ignore the code, as it could lead to charging system issues or other electrical problems.

7. How do I fix the U1516 code on my Cadillac?

Fixes may include repairing or replacing damaged wiring or connectors, replacing the Battery Sensor Module, updating BCM software, or replacing a weak battery.

8. How much does it cost to repair the U1516 code?

The cost can vary but may range from $100 to $500 depending on whether itâ€™s a wiring issue, a module replacement, or a software update.

9. Can a faulty alternator trigger the U1516 code?

An alternator issue is less likely to directly cause this code, but it could contribute to low voltage conditions that might indirectly cause communication errors.

10. Do I need to reprogram the BCM after fixing the U1516 code?

In some cases, the BCM may need to be reprogrammed or reset after repairs to clear the code and restore proper communication.