What Does C1737 Mean?
The air suspension exhaust solenoid valve circuit is shorted to battery voltage. This solenoid controls the release of air from the suspension system for lowering the vehicle. A short to battery means the valve may be energized continuously, potentially dumping air from the system uncontrollably, or the module may disable the system to prevent unintended air loss.
Common Causes
35%
Wiring harness damage with the exhaust solenoid control wire contacting a 12V source
25%
Failed exhaust solenoid valve with internal short to power
20%
Corroded or damaged connector at the exhaust solenoid allowing cross-circuit contact
10%
Aftermarket wiring or repair splice interfering with the solenoid circuit
10%
Suspension control module internal fault on the solenoid driver circuit
Diagnostic Steps
1
Disconnect the exhaust solenoid connector and measure voltage on the control wire from the module side — with the solenoid disconnected and the module not commanding it, there should be no voltage. Battery voltage present indicates a harness short.
2
Measure the solenoid coil resistance (typically 2-8 ohms) and check for shorts between the coil terminals and the solenoid housing — any low resistance to ground or battery indicates internal failure.
3
Inspect the connector at the exhaust solenoid for corrosion, water damage, and pin condition — the solenoid is typically located near the compressor under the vehicle and is exposed to road spray.
4
Trace the wiring from the solenoid connector back toward the module, checking for chafing against the frame, heat shield contact, or areas where the wire may contact power wires.
5
If the harness and solenoid check good, verify the module is not commanding the solenoid by monitoring the module output with a lab scope or scan tool while the system is in standby.
Estimated Repair Cost
$100 - $700
Parts + labor, varies by vehicle and location
The air suspension exhaust solenoid valve circuit is shorted to battery voltage. This solenoid controls the release of air from the suspension system for lowering the vehicle. A short to battery means the valve may be energized continuously, potentially dumping air from the system uncontrollably, or...
The most common cause of C1737 (Exhaust Solenoid Valve Short to Battery) is: Wiring harness damage with the exhaust solenoid control wire contacting a 12V source
Typical repair costs for C1737 range from $100 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
If the exhaust solenoid is stuck open due to the short, the suspension may lose all air pressure rapidly, causing the vehicle to bottom out. This is a safety concern. If the system has been disabled by the module, the vehicle will ride at a fixed height. Check if the vehicle is sagging — if so, do not drive. If height is maintained, drive cautiously to a repair shop.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1737 to identify the root cause.
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Quick Info
Category
Chassis
System
Air Suspension
Difficulty
Type
Manufacturer
Recommended Tools
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