C1791 Lincoln Code - Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Open
Quick Answer
The Vehicle Dynamic Module (VDM) will command the air spring solenoid(s) ON or OFF when certain conditions are met. Common causes include Faulty Air Suspension Left Rear Air Spring/Shock Solenoid, Air Suspension Left Rear Air Spring/Shock Solenoid harness is open or shorted, Air Suspension Left Rear Air Spring/Shock Solenoid 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
- C1791 Lincoln indicates Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Open.
- Common causes
- Common causes include Faulty Air Suspension Left Rear Air Spring/Shock Solenoid, Air Suspension Left Rear Air Spring/Shock Solenoid harness is open or shorted, Air Suspension Left Rear Air Spring/Shock Solenoid 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 C1791 Lincoln Description
What are the Possible Causes of the DTC C1791 Lincoln?
- Faulty Air Suspension Left Rear Air Spring/Shock Solenoid
- Air Suspension Left Rear Air Spring/Shock Solenoid harness is open or shorted
- Air Suspension Left Rear Air Spring/Shock Solenoid circuit poor electrical connection
- Faulty Vehicle Dynamic Module (VDM)
How to Fix the DTC C1791 Lincoln?
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 C1791 Lincoln 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.
Need more information about the C1791 Lincoln code?
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Frequently Asked Questions about C1791 Lincoln Code
1. What are the common symptoms of OBDII code C1791 in a Lincoln related to the left rear air suspension solenoid circuit?
The common symptoms include a noticeable sagging in the left rear of the vehicle, uneven ride height, and potential loss of air pressure in the air spring/shock.
2. What are the possible causes of the OBDII code C1791 in a Lincoln?
Potential causes for this code include a faulty left rear air spring solenoid, damaged wiring or connectors in the circuit, or a problem with the air suspension control module.
3. How can I diagnose the issue related to the left rear air suspension solenoid output circuit being open?
You can start by visually inspecting the wiring and connectors for any visible damage. Using a multimeter, you can also test the continuity of the circuit and check for proper voltage at the solenoid.
4. Can I still drive my Lincoln with the C1791 code present?
While it may be possible to drive the vehicle with this code, it is not recommended as it can lead to further damage to the air suspension system. It's best to address the issue promptly.
5. How can I repair the Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Open issue in my Lincoln?
Repair options include replacing the faulty solenoid, repairing any damaged wiring or connectors, or reprogramming the air suspension control module if necessary.
6. Will resetting the OBDII code C1791 clear the issue with the left rear air suspension solenoid circuit?
Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the circuit to be open. Proper diagnosis and repair are needed for a permanent solution.
7. Is it safe to attempt DIY repairs for the C1791 code in a Lincoln's air suspension system?
If you have experience working with automotive electrical systems and proper tools, you may be able to perform basic repairs like checking wiring and connectors. However, complex repairs are best left to professional technicians.
8. What is the typical cost to repair the Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Open issue in a Lincoln?
The cost of repair can vary depending on the exact cause of the issue and whether you choose to address it yourself or take it to a professional. Costs may range from a few hundred to over a thousand dollars.
9. Can extreme weather conditions affect the occurrence of the C1791 code in a Lincoln's air suspension system?
Extreme temperatures or moisture can potentially impact the electrical components of the air suspension system, leading to issues like an open circuit in the left rear air spring solenoid.
10. How often should I have the air suspension system in my Lincoln inspected to prevent issues like the C1791 code from occurring?
It's recommended to have the air suspension system inspected during regular maintenance visits or if you notice any changes in the vehicle's ride quality or height. Regular inspections can help prevent issues like an open circuit in the solenoid.
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