U1301 Buick Code - High Voltage On Class 2 Serial Data Circuit
Quick Answer
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Repair other code first. 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
- U1301 Buick indicates High Voltage On Class 2 Serial Data Circuit.
- Common causes
- Common causes include Repair other code first.
- 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 U1301 Buick Description
How to Fix the DTC U1301 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U1301 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 U1301 Buick Code
1. What does the OBDII code U1301 mean on a Buick?
The U1301 code indicates high voltage on the Class 2 Serial Data Circuit, which is responsible for communication between various vehicle control modules.
2. What are the common symptoms of the U1301 code on a Buick?
Symptoms may include a malfunctioning dashboard, erratic or lost communication between modules, warning lights (such as the check engine light), or failure of certain vehicle systems.
3. What causes the U1301 code to appear in a Buick?
Common causes include a short to voltage in the Class 2 data circuit, damaged wiring, faulty connectors, a malfunctioning control module, or interference from aftermarket devices.
4. Can the U1301 code cause drivability issues?
Yes, depending on the affected systems, the code can lead to issues like transmission problems, loss of power steering assist, or engine performance concerns.
5. How do I diagnose the U1301 code on my Buick?
Start by inspecting the wiring and connectors in the Class 2 data circuit for damage or corrosion. Use a diagnostic scan tool to monitor communication between modules and identify the affected circuit.
6. Can an aftermarket accessory trigger the U1301 code on a Buick?
Yes, improperly installed aftermarket devices like remote starters or audio systems can interfere with the Class 2 data circuit and cause high voltage.
7. How do I fix the U1301 code on my Buick?
Repairs may involve fixing damaged wiring, cleaning or replacing corroded connectors, removing aftermarket devices causing interference, or replacing a faulty control module.
8. Is the U1301 code specific to Buicks?
No, the U1301 code can appear on other GM vehicles as well, but the exact symptoms and repair steps may vary depending on the model.
9. Can I drive my Buick with the U1301 code?
It’s not recommended, as the code can cause communication failures between critical systems, potentially leading to unsafe driving conditions.
10. Will clearing the U1301 code solve the problem?
Clearing the code will remove it temporarily, but the underlying issue must be addressed to prevent the code from returning.
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