U1520 Buick 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 Buick 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.
Code U1520 Buick Description
What are the Possible Causes of the DTC U1520 Buick?
- 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 Buick?
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 Buick 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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Frequently Asked Questions about U1520 Buick Code
1. What does OBDII code U1520 mean on a Buick?
It indicates a loss of communication between the Driver/Passenger Seat Memory Control Module and the Driver/Passenger Seat Bolster Memory Control Module over the LIN bus.
2. What are the common symptoms of U1520 on a Buick?
Symptoms may include non-functional seat memory settings, inability to adjust seat bolsters, or a warning light on the dashboard.
3. What causes the U1520 code to appear on a Buick?
Potential causes include a faulty seat memory control module, damaged LIN bus wiring, loose electrical connections, or a software glitch in the control module.
4. Can a weak battery cause the U1520 code on a Buick?
Yes, a weak or failing battery can disrupt communication between modules and potentially trigger this code.
5. How can I diagnose the U1520 code on a Buick?
Start by checking the wiring and connectors for damage or corrosion, then test the seat memory and bolster control modules for faults using a scan tool.
6. Is it safe to drive a Buick with the U1520 code?
Yes, it’s generally safe to drive, but seat memory and bolster functions may be impaired, reducing comfort or convenience.
7. How do I fix the U1520 code on a Buick?
Repairs may include replacing damaged wiring, reconnecting loose connectors, or reprogramming or replacing the affected control modules.
8. Can the U1520 code be cleared without repairs?
Clearing the code with a scan tool may temporarily erase it, but if the underlying issue isn’t resolved, the code will likely return.
9. How much does it cost to repair the U1520 code on a Buick?
Costs vary depending on the issue but may range from $100 for basic wiring repairs to over $500 if a module replacement is required.
10. Can a software update fix the U1520 code on a Buick?
Yes, in some cases, a software update from the dealership may resolve communication issues between the modules.
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