U1170 Buick Code - Lost Communications With Driver Door Switch Assembly
Quick Answer
The U1170 Buick code indicates that there is a communication error between the vehicle's onboard computer system and the driver door switch assembly. Common causes include Faulty driver door switch assembly, Wiring issues or loose connections between the switch assembly and the vehicle's computer, Corrosion or damage to the CAN communication lines. 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
- U1170 Buick indicates Lost Communications With Driver Door Switch Assembly.
- Common causes
- Common causes include Faulty driver door switch assembly, Wiring issues or loose connections between the switch assembly and the vehicle's computer, Corrosion or damage to the CAN communication lines.
- 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 U1170 Buick Description
The U1170 Buick code indicates that there is a communication error between the vehicle's onboard computer system and the driver door switch assembly. This assembly is responsible for controlling various functions related to the driver's door, such as power windows, door locks, and mirror adjustments. When communication is lost with this component, it can lead to a range of issues affecting the vehicle's performance and functionality.
Common Causes of U1170 Buick
- Faulty driver door switch assembly.
- Wiring issues or loose connections between the switch assembly and the vehicle's computer.
- Corrosion or damage to the CAN communication lines.
- Software glitches in the vehicle's computer system.
- Electrical interference from aftermarket accessories or modifications.
Symptoms of U1170 Buick
- Inoperable power windows from the driver's side.
- Inability to lock or unlock doors using the driver's side switch.
- Malfunctioning mirror adjustments from the driver's side.
- Warning light on the dashboard indicating a communication error.
How to Fix U1170 Buick
- Begin by conducting a thorough inspection of the driver door switch assembly, checking for any visible damage or signs of malfunction.
- Inspect the wiring harness connecting the switch assembly to the vehicle's computer for any loose connections or damage.
- Use a diagnostic scanner to check for error codes and attempt to reset the communication between the switch assembly and the vehicle's computer.
- If the issue persists, consider replacing the driver door switch assembly with a new unit.
- Test the functionality of the power windows, door locks, and mirror adjustments after the repair to ensure proper communication and operation.
Cost to Fix U1170 Buick
The cost of repairing a lost communication issue with the driver door switch assembly can vary depending on the specific cause of the problem and the cost of parts and labor. In general, the repair cost for this issue can range from $150 to $400, including parts and labor. However, as mentioned earlier, labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle model.
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Frequently Asked Questions about U1170 Buick Code
1. What does the OBDII code U1170 mean on a Buick?
It indicates a loss of communication with the Driver Door Switch Assembly (DDSA), which is part of the vehicle’s communication network.
2. What are the common symptoms of the U1170 code on a Buick?
Symptoms can include inoperative power windows, door locks, or mirrors, and possibly a warning light on the dashboard.
3. What causes the U1170 code to appear in a Buick?
The code is typically caused by issues such as a damaged wiring harness, a faulty driver door switch assembly, or a problem with the communication network.
4. Can a weak battery cause the U1170 code?
Yes, a weak or failing battery can disrupt the communication network, potentially triggering the U1170 code.
5. How do you diagnose the U1170 code in a Buick?
Diagnosis involves checking for damaged or corroded wiring, testing the driver door switch assembly, and inspecting communication network connections.
6. Is it safe to drive with the U1170 code active?
While it may not immediately affect drivability, the loss of door switch functionality can be inconvenient and should be addressed promptly.
7. How do you fix the U1170 code on a Buick?
Repairs may involve replacing the driver door switch assembly, repairing damaged wiring, or updating the vehicle’s software if needed.
8. Can a blown fuse trigger the U1170 code?
Yes, a blown fuse in the circuit controlling the driver door switch assembly could cause a loss of communication and set the code.
9. How much does it cost to fix the U1170 code on a Buick?
Repair costs can vary widely, ranging from $50 for a simple wiring repair to $300 or more if the driver door switch assembly needs replacement.
10. Can the U1170 code clear itself after repairs?
The code may clear itself after repairs, but it may also require a scan tool to reset it and verify the issue is resolved.
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