AutoCodes – Chevrolet – U1520 Chevrolet

U1520 Chevrolet Code - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Bolster Memory Control 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 Driver/Passenger Seat Bolster Memory Control Module, Driver/Passenger Seat Bolster Memory Control Module harness is open or shorted, Driver/Passenger Seat Bolster Memory 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: U1520 Chevrolet indicates Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Bolster Memory Control Module On LIN Bus.
Common causes: Common causes include Faulty Driver/Passenger Seat Bolster Memory Control Module, Driver/Passenger Seat Bolster Memory Control Module harness is open or shorted, Driver/Passenger Seat Bolster Memory 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 1,640

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 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1520 Chevrolet 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 Driver/Passenger Seat Memory Control Module from the Driver/Passenger Seat Bolster Memory Control Module has not been received.

OBDII Code U1520 Chevrolet - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Bolster Memory Control Module On LIN Bus - AutoCodes.com — U1520 Chevrolet Code - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Bolster Memory Control Module On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U1520 Chevrolet?

Faulty Driver/Passenger Seat Bolster Memory Control Module
Driver/Passenger Seat Bolster Memory Control Module harness is open or shorted
Driver/Passenger Seat Bolster Memory Control Module circuit poor electrical connection
Faulty Driver/Passenger Seat Memory Control Module

How to Fix the DTC U1520 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 U1520 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 U1520 Chevrolet Code

1. What are common symptoms of OBDII code U1520 in a Chevrolet related to the Driver/Passenger Seat Memory Control Module?

- Common symptoms include erratic seat adjustments, loss of seat memory settings, and warning lights on the dashboard.

2. What are possible causes for the U1520 code indicating lost communication with the Driver/Passenger Seat Bolster Memory Control Module on the LIN bus?

- Possible causes include a faulty seat memory control module, damaged wiring harness, loose connections, or a malfunctioning LIN bus communication network.

3. How can I diagnose the U1520 code in my Chevrolet due to communication issues with the seat memory control module?

- Diagnose by inspecting the wiring harness for any visible damage, checking connections for tightness, and using a diagnostic scan tool to analyze communication errors.

4. Is it safe to drive my Chevrolet with the U1520 code triggered by a communication loss with the seat memory control module?

- It is generally safe to drive, but you may experience inconvenience with seat adjustments and memory settings until the issue is resolved.

5. Can I repair the U1520 code related to the Driver/Passenger Seat Memory Control Module myself?

- Depending on your skill level and access to tools, you may be able to address the issue by checking wiring connections, resetting the module, or replacing components if necessary.

6. How much does it typically cost to repair the U1520 code caused by communication problems with the seat memory control module in a Chevrolet?

- Repair costs can vary widely depending on the exact cause of the issue, but expect to pay anywhere from $100 to $500 for parts and labor.

7. Are there any temporary fixes or workarounds for the U1520 code before I can get it professionally repaired?

- You may try resetting the seat memory control module by disconnecting the car battery for a few minutes, but it's recommended to have the issue properly diagnosed and repaired.

8. Will the U1520 code prevent my Chevrolet from passing a state emissions inspection?

- In most cases, the U1520 code related to the seat memory control module will not affect emissions and should not prevent your vehicle from passing an inspection.

9. How long does it typically take to repair the U1520 code caused by communication loss with the Driver/Passenger Seat Memory Control Module?

- The repair time can vary depending on the exact cause of the issue and the availability of parts, but it usually takes a few hours to half a day at a repair shop.

10. Can the U1520 code be a recurring issue in a Chevrolet even after it has been repaired once?

- While it's possible for the code to reappear if the underlying problem persists, a proper diagnosis and repair should minimize the chances of recurrence.