B2590 Buick Code - Left Cornering Lamp Circuit Short To Ground
Quick Answer
The cornering lamps are activated automatically at vehicle speeds below 25 MPH (40 km/h) when the turn signal/multifunction switch is placed in either the left or right turn positions and/or when the steering angle is changed from the straight-ahead position towards the side the vehicle is turning. Common causes include Faulty Left Cornering Lamp, Left Cornering Lamp harness is open or shorted, Left Cornering Lamp 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
- B2590 Buick indicates Left Cornering Lamp Circuit Short To Ground.
- Common causes
- Common causes include Faulty Left Cornering Lamp, Left Cornering Lamp harness is open or shorted, Left Cornering Lamp 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 B2590 Buick Description
What are the Possible Causes of the DTC B2590 Buick?
- Faulty Left Cornering Lamp
- Left Cornering Lamp harness is open or shorted
- Left Cornering Lamp circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B2590 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 B2590 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 B2590 Buick Code
1. What does the OBDII code B2590 mean on a Buick?
The B2590 code indicates a short-to-ground issue in the left cornering lamp circuit, which prevents the lamp from functioning properly.
2. What are the symptoms of the B2590 code on a Buick?
Common symptoms include the left cornering lamp not working, possible warning lights on the dashboard, and reduced visibility during turns at night.
3. What causes the B2590 code on a Buick?
The code is typically caused by damaged wiring, a faulty left cornering lamp bulb, a corroded or loose connector, or a defective lamp control module.
4. Can I drive my Buick with the B2590 code active?
Yes, you can drive the vehicle, but the left cornering lamp will not function, which might reduce safety during nighttime driving or when turning in poorly lit areas.
5. How do I diagnose the B2590 code on a Buick?
Start by inspecting the left cornering lamp bulb, wiring, and connectors for damage or corrosion. Use a multimeter to check for a short-to-ground in the circuit.
6. How do I fix the B2590 code on a Buick?
Repairs may include replacing the left cornering lamp bulb, repairing damaged wiring, cleaning corroded connectors, or replacing the lamp control module if necessary.
7. How much does it cost to fix the B2590 code on a Buick?
The cost varies depending on the issue. Replacing a bulb may cost around $20-$50, while repairing wiring or replacing a control module could cost $100-$500 or more.
8. Can a blown fuse cause the B2590 code on a Buick?
No, a blown fuse is not the direct cause of this code, but the short-to-ground issue in the circuit may cause a fuse to blow, which should also be checked.
9. Will clearing the B2590 code fix the issue?
Clearing the code may turn off the warning temporarily, but the underlying issue needs to be repaired to prevent the code from returning.
10. Can a faulty BCM (Body Control Module) trigger the B2590 code on a Buick?
While rare, a malfunctioning BCM could potentially cause the code if it fails to properly control the cornering lamp circuit.
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