C1791 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 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 Description
What are the Possible Causes of the DTC C1791?
- 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?
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 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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Information for Specific Makes
- C1791 Ford — Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Open
- C1791 Lexus — Absorber Control Switch Circuit
- C1791 Lincoln — Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Open
- C1791 Mercury — Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Open
- C1791 Toyota — Absorber Control Switch Circuit
Frequently Asked Questions about C1791 Code
1. What are the common symptoms of OBDII code C1791?
The common symptoms of OBDII code C1791 include a noticeable decrease in ride quality, uneven suspension height, and a warning light on the dashboard indicating an issue with the air suspension system.
2. What can cause the OBDII code C1791 to appear?
The OBDII code C1791, indicating an Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Open, can be triggered by a faulty solenoid, damaged wiring, or a poor connection in the circuit.
3. How can I diagnose the issue related to OBDII code C1791?
To diagnose the issue related to OBDII code C1791, you can use a diagnostic scanner to read the code and inspect the left rear air spring/shock solenoid, wiring, and connections for any visible damage or loose connections.
4. What are some repair tips for resolving OBDII code C1791?
Repair tips for resolving OBDII code C1791 include checking and repairing any damaged wiring, ensuring proper connection of the left rear air spring/shock solenoid, and clearing the code to see if the issue persists.
5. Can I drive my vehicle with OBDII code C1791?
It is not recommended to drive your vehicle with OBDII code C1791 as it can affect the performance and safety of the air suspension system. It is best to address the issue promptly to prevent further damage.
6. How much does it typically cost to repair OBDII code C1791?
The cost to repair OBDII code C1791 can vary depending on the extent of the damage and the labor rates in your area. Typically, it may range from $100 to $300 for parts and labor.
7. Is OBDII code C1791 a common issue in certain vehicle models?
OBDII code C1791 related to the Air Suspension Left Rear Air Spring/Shock Solenoid Output Circuit Open can be a common issue in vehicles equipped with air suspension systems, particularly in luxury vehicles.
8. Can OBDII code C1791 be a recurring problem even after repair?
OBDII code C1791 can be a recurring problem if the root cause, such as a faulty solenoid or damaged wiring, is not properly addressed during the repair. It is essential to ensure a thorough diagnosis and repair to prevent recurrence.
9. Is it possible to clear OBDII code C1791 without repairing the issue?
While it is possible to clear OBDII code C1791 temporarily, the underlying issue with the air suspension system should be repaired to prevent further complications and ensure the proper functioning of the vehicle.
10. How long does it typically take to repair OBDII code C1791?
The repair time for OBDII code C1791 can vary depending on the exact cause of the issue and the complexity of the repair. In general, it may take a few hours to a full day for diagnosis and repair.
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