U007D Buick Code - Control Module Communication Low Speed Extension CAN Bus Off
Quick Answer
The devices connected to the object high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted. 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
- U007D Buick indicates Control Module Communication Low Speed Extension CAN Bus Off.
- Common causes
- Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted.
- 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 U007D Buick Description
What are the Possible Causes of the DTC U007D Buick?
- Check for more codes
- Faulty Control Module
- Control Module harness is open or shorted
- Control Module circuit poor electrical connection
How to Fix the DTC U007D 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 U007D 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 U007D Buick Code
1. What does the OBDII code U007D mean on a Buick?
The code U007D indicates an issue with the low-speed extension of the CAN bus system, where communication between control modules has been disrupted.
2. What are the common symptoms of U007D in a Buick?
Symptoms may include warning lights like the check engine light, erratic vehicle behavior, loss of communication with certain modules, or failure of specific systems, such as ABS or traction control.
3. What causes the U007D code on a Buick?
Common causes include damaged wiring or connectors in the CAN bus system, faulty control modules, or electrical interference affecting communication.
4. Can a weak battery trigger the U007D code in a Buick?
Yes, a weak or failing battery can cause voltage fluctuations that disrupt CAN bus communication, potentially triggering the U007D code.
5. How do you diagnose a U007D code on a Buick?
Diagnosis involves scanning for related codes, inspecting CAN bus wiring and connectors for damage, checking module power and ground connections, and testing communication signals.
6. Can a faulty control module cause the U007D code on a Buick?
Yes, a defective control module can fail to communicate properly on the CAN bus system, leading to the U007D code.
7. How do you fix the U007D code on a Buick?
Repairs may include replacing damaged wiring, repairing or replacing connectors, resolving module power issues, or replacing faulty control modules.
8. Is it safe to drive a Buick with the U007D code?
Driving may be unsafe if the code affects critical systems like ABS or traction control. It's best to address the issue promptly.
9. Can a software update fix the U007D code on a Buick?
In some cases, a software update for the affected control module may resolve communication issues if they are related to programming errors.
10. What tools are needed to troubleshoot the U007D code on a Buick?
You’ll need an OBDII scanner capable of reading CAN bus codes, a multimeter for checking circuits, and possibly wiring diagrams for the vehicle.
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