U2166 Buick Code - Lost Communication With Driver Position Module
Quick Answer
Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Driver Position Module (DPM), Driver Position Module harness is open or shorted, Driver Position 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
- U2166 Buick indicates Lost Communication With Driver Position Module.
- Common causes
- Common causes include Faulty Driver Position Module (DPM), Driver Position Module harness is open or shorted, Driver Position 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 U2166 Buick Description
What are the Possible Causes of the DTC U2166 Buick?
- Faulty Driver Position Module (DPM)
- Driver Position Module harness is open or shorted
- Driver Position Module circuit poor electrical connection
How to Fix the DTC U2166 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 U2166 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 U2166 Buick Code
1. What does the OBDII code U2166 mean on a Buick?
The U2166 code indicates a lost communication with the Driver Position Module (DPM), which manages driver seat and mirror position settings.
2. What are common symptoms of the U2166 code in a Buick?
Symptoms may include unresponsive seat or mirror adjustments, memory settings not working, or intermittent power to the driver seat controls.
3. What causes the U2166 code to appear on a Buick?
This code is often caused by a faulty Driver Position Module, damaged wiring, poor electrical connections, or issues with the CAN bus communication network.
4. How do I diagnose the U2166 code on my Buick?
Use an advanced scan tool to check for communication errors, inspect the wiring and connectors related to the DPM, and verify the integrity of the CAN bus network.
5. Can a weak battery cause the U2166 code on a Buick?
Yes, a weak or failing battery can disrupt communication between modules and trigger the U2166 code.
6. How do I fix the U2166 code on my Buick?
Repairs may include replacing the Driver Position Module, repairing damaged wiring, cleaning connector contacts, or updating the module’s software.
7. Is it safe to drive with the U2166 code on my Buick?
Yes, but features like memory seat and mirror adjustments may not work. It’s best to address the issue promptly to avoid further electrical problems.
8. How much does it cost to repair a U2166 code on a Buick?
Repair costs vary but typically range from $150 to $500, depending on whether the DPM needs replacement or if wiring repairs are required.
9. Can the U2166 code clear itself on a Buick?
The code may temporarily clear if the communication issue resolves, but it will likely return until the root cause is fixed.
10. Do I need to reprogram the Driver Position Module after replacing it?
Yes, in most cases, the replacement module must be programmed or initialized to function correctly with the vehicle's systems.
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