C1796: Rear Right Air Spring Solenoid Open
Diagnostic trouble code C1796 indicates an open circuit in the output to the right rear air spring solenoid on vehicles equipped with air suspension, such as Ford, Lincoln, and Mercury models. The suspension control module (SCM or RCM) detects a break in the circuit that prevents the solenoid from activating, which can cause the air spring to lose pressure or remain locked in its current position, affecting ride height and handling.
1. Commonly Affected Makes
2. Most Common Causes
- Damaged or open coil in the right rear air spring solenoid
- Cut, corroded, or disconnected wiring between the suspension module and the right rear solenoid
- Corroded, bent, or moisture-damaged pins in the right rear solenoid connector
- Internal failure of the suspension control module (SCM/RCM) output circuit
- Blown fuse in the solenoid power supply circuit
- Incorrect replacement of the right rear air spring with an incompatible unit
3. Symptoms You Will Notice
- Vehicle sagging or leaning on the right rear side
- Suspension warning light illuminated on the dashboard
- Air suspension system inoperative or stuck at one height
- Rough ride or poor handling from the rear
4. Step-by-Step Diagnosis
Scan for codes and verify C1796 is present; check for related codes.
Inspect the right rear air spring solenoid connector for corrosion, damage, or loose pins.
Test the solenoid resistance with a multimeter; compare to manufacturer specs (typically 4-12 ohms).
Check for battery voltage and ground at the solenoid connector with the system active.
Inspect wiring harness from the suspension module to the solenoid for breaks or shorts.
If wiring and solenoid are good, test the suspension module output or replace the module.
5. Frequently Asked Questions
Is it safe to drive?▼
Driving with code C1796 is not recommended for long distances. The vehicle may sag or handle poorly, increasing the risk of damage to the air spring or other suspension components. It is best to have it diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs vary widely: a solenoid replacement can be $200-$500, wiring repairs $100-$300, and module replacement $400-$800. Total cost typically ranges from $200 to $1,000 depending on the root cause.