C1790 Mercury Code - Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Failure
Quick Answer
The C1790 code on a Mercury indicates a problem with the Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit. Common causes include Damaged wiring or connectors in the circuit, Faulty solenoid controlling the air spring/shock absorber, Malfunctioning air spring or shock absorber. 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
- C1790 Mercury indicates Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Failure.
- Common causes
- Common causes include Damaged wiring or connectors in the circuit, Faulty solenoid controlling the air spring/shock absorber, Malfunctioning air spring or shock absorber.
- 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 C1790 Mercury Description
The C1790 code on a Mercury indicates a problem with the Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit. This means there is a failure in the electrical circuit that controls the air spring or shock absorber on the left rear side of the vehicle. The air suspension system is responsible for providing a smooth ride by adjusting the vehicle's height and stiffness based on road conditions. When this specific circuit fails, it can lead to issues with the vehicle's handling, ride comfort, and overall performance.
Common Causes of C1790 Mercury
- Damaged wiring or connectors in the circuit
- Faulty solenoid controlling the air spring/shock absorber
- Malfunctioning air spring or shock absorber
- Issues with the control module responsible for the air suspension system
- Electrical issues such as a blown fuse or relay related to the circuit
Symptoms of C1790 Mercury
- Uneven ride height on the left rear side of the vehicle
- Harsh or bumpy ride quality
- Warning light on the dashboard indicating an issue with the air suspension system
- Vehicle sagging on one side
- Abnormal noises coming from the suspension system
How to Fix C1790 Mercury
- Begin by conducting a visual inspection of the wiring, connectors, and components related to the left rear air spring/shock solenoid circuit.
- Use a multimeter to test the continuity and voltage of the circuit to identify any electrical issues.
- Check the solenoid, air spring, and shock absorber for proper functionality and replace any components that are faulty.
- Clear the diagnostic trouble codes from the vehicle's system using a scan tool and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, consult a professional mechanic or dealership for further diagnosis and potential replacement of the control module.
Cost to Fix C1790 Mercury
The typical repair costs for addressing a C1790 code on a Mercury can range from $200 to $800, depending on the specific cause of the issue and the cost of replacement parts. This estimate includes the cost of parts such as a new solenoid, air spring, shock absorber, or control module, as well as labor fees for diagnosis and repair. It's important to note that prices can vary based on location, vehicle make and model, and the rates of the auto repair shop. It is recommended to obtain a personalized quote from a trusted mechanic before proceeding with the repair.
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Frequently Asked Questions about C1790 Mercury Code
1. What does the OBDII code C1790 mean on a Mercury vehicle?
C1790 indicates a failure in the left rear air spring/shock solenoid output circuit, which is part of the air suspension system.
2. What are the symptoms of code C1790 on a Mercury?
Common symptoms include an uneven or sagging suspension, a noticeable drop in the rear-left corner of the vehicle, or a suspension warning light on the dashboard.
3. What causes the C1790 code to trigger?
This code can be caused by a faulty air suspension solenoid, damaged wiring or connectors in the circuit, or a malfunctioning air suspension control module.
4. Can I drive my Mercury with the C1790 code active?
While the vehicle may still be drivable, continued use can lead to further damage to the suspension system and compromised ride quality or handling.
5. How do I diagnose the C1790 code on a Mercury?
Start by visually inspecting the wiring and connectors for damage or corrosion, then test the solenoid and circuit continuity with a multimeter. Check for signal output from the air suspension control module.
6. How do I fix the C1790 code on my Mercury?
Repairs may include replacing the left rear air suspension solenoid, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming/replacing the air suspension control module if necessary.
7. Can a blown fuse cause the C1790 code?
Yes, if the fuse for the air suspension system is blown, it can result in a loss of power to the solenoid circuit and trigger the code.
8. How much does it cost to repair the C1790 code?
Repair costs vary depending on the issue but can range from $100 to $600, with solenoid replacement being less expensive and control module replacement costing more.
9. What tools are needed to fix the C1790 code?
You’ll need a diagnostic scanner, a multimeter, and possibly wiring repair tools. In some cases, specialized tools for air suspension components may be required.
10. Can I reset the C1790 code without fixing the problem?
While you can clear the code using a diagnostic scanner, it will likely return if the underlying issue is not resolved.
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