C1791 Mercury 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 Mercury 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 Mercury Description
What are the Possible Causes of the DTC C1791 Mercury?
- 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 Mercury?
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 Mercury 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 C1791 Mercury Code
1. What are common symptoms of OBDII code C1791 for a Mercury related to the left rear air spring/shock solenoid output circuit open?
The common symptoms include a noticeable sagging or uneven ride height in the left rear of the vehicle, decreased handling and stability, and potential warning lights on the dashboard.
2. What can cause the OBDII code C1791 on a Mercury related to the left rear air spring/shock solenoid output circuit open?
Possible causes include a faulty solenoid, damaged wiring or connectors in the circuit, a blown fuse, or issues with the air suspension system itself.
3. How can I diagnose the OBDII code C1791 related to the left rear air spring/shock solenoid output circuit open on my Mercury?
Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code, visually inspecting the wiring and connectors for damage, testing the solenoid for proper function, and checking the fuse related to the air suspension.
4. Can I still drive my Mercury with the OBDII code C1791 related to the left rear air spring/shock solenoid output circuit open?
It is not recommended to drive the vehicle extensively with this code present, as it can lead to further damage to the air suspension system and compromise overall driving safety and comfort.
5. What are some repair tips for addressing the OBDII code C1791 on a Mercury related to the left rear air spring/shock solenoid output circuit open?
Repair tips may include checking and replacing damaged wiring or connectors, testing and replacing the faulty solenoid, ensuring proper fuse functionality, and resetting the system after repairs are made.
6. Is it possible to reset the OBDII code C1791 related to the left rear air spring/shock solenoid output circuit open on a Mercury without repairs?
While clearing the code may temporarily turn off the warning lights, it is crucial to address the root cause of the issue to prevent further problems with the air suspension system.
7. How much can I expect to pay for repairs related to the OBDII code C1791 on a Mercury for the left rear air spring/shock solenoid output circuit open?
The cost of repairs can vary depending on the specific issue, but it may involve labor costs for diagnosis and repair, as well as the price of any replacement parts needed, such as a new solenoid or wiring components.
8. Are there any preventive maintenance steps I can take to avoid encountering the OBDII code C1791 related to the left rear air spring/shock solenoid output circuit open on my Mercury?
Regularly inspecting the air suspension system, checking for any signs of wear or damage, and addressing any issues promptly can help prevent this code from occurring due to neglected maintenance.
9. Can weather or road conditions impact the occurrence of the OBDII code C1791 on a Mercury related to the left rear air spring/shock solenoid output circuit open?
Extreme weather conditions or rough road surfaces can potentially exacerbate existing issues with the air suspension system, leading to the triggering of this specific trouble code.
10. How long does it typically take to repair the OBDII code C1791 related to the left rear air spring/shock solenoid output circuit open on a Mercury?
The repair time can vary based on the complexity of the issue and the availability of parts, but it may range from a few hours to a full day, depending on the extent of the repairs needed.
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