U2602 Buick Code - Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2
Quick Answer
Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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
- U2602 Buick indicates Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2.
- Common causes
- Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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 U2602 Buick Description
This diagnostic is used to check the loss of communication with the Hybrid/EV Powertrain Control Module 2 on a high-speed General Motors Local Area Network (GMLAN) bus. The Battery Energy Control Module supervises a periodic serial data message to check the communication status of the Hybrid/EV Powertrain Control Module 2. If this message is not received within 400 ms, the Battery Energy Control Module increases its fail count. When this fail count is over X Cal Value (7) during Y Cal Value (10 samples), the diagnostic status of this code is set to Failed and transmitted over high voltage energy high-speed GMLAN bus to the Hybrid/EV Powertrain Control Module 2.
The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received within 400 ms.
What are the Possible Causes of the DTC U2602 Buick?
- Faulty Hybrid/EV Powertrain Control Module 2
- Hybrid/EV Powertrain Control Module 2 harness is open or shorted
- Hybrid/EV Powertrain Control Module 2 circuit poor electrical connection
How to Fix the DTC U2602 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 U2602 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 U2602 Buick Code
1. What are the common symptoms of OBDII code U2602 in a Buick?
- The common symptoms include issues with hybrid/EV powertrain operation, poor fuel efficiency, and potential drivability concerns.
2. What could cause the U2602 code to trigger in a Buick?
- The code may be triggered due to a communication breakdown between the Battery Energy Control Module (BECM) and the Hybrid/EV Powertrain Control Module 2 (HPCM2).
3. How serious is the U2602 code in a Buick?
- This code should be addressed promptly as it can impact the overall performance and efficiency of the hybrid or electric powertrain system in the vehicle.
4. How can I diagnose the U2602 code in my Buick?
- Diagnosis typically involves using a professional OBDII scanner to retrieve the code and then performing further testing to identify the exact communication issue.
5. Can I repair the U2602 code in my Buick myself?
- While some basic troubleshooting steps can be taken, resolving the U2602 code may require specialized knowledge and equipment, so seeking professional help is recommended.
6. How much does it cost to fix the U2602 code in a Buick?
- The cost of fixing the U2602 code can vary depending on the root cause of the issue, the extent of the repair needed, and the labor rates of the service provider.
7. Are there any DIY tips for addressing the U2602 code in a Buick?
- Some DIY tips include checking for loose connections, ensuring proper battery health, and inspecting related components for any visible damage.
8. Can driving with the U2602 code cause further damage to my Buick?
- Continuing to drive with the U2602 code may exacerbate the communication problem between modules and potentially lead to more severe issues with the hybrid or electric powertrain system.
9. How long does it take to repair the U2602 code in a Buick?
- The repair time can vary depending on the exact cause of the U2602 code, the availability of replacement parts, and the workload of the service provider.
10. Is it safe to drive my Buick with the U2602 code present?
- It is not recommended to drive the vehicle with the U2602 code present, as it can affect the performance and reliability of the hybrid or electric powertrain system.
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