What Does C1920 Mean?
The chassis control module has detected a circuit failure in LED indicator #1. This LED provides visual feedback to the driver regarding a chassis system status (such as air suspension mode, stability control, or ride control). The LED cannot illuminate or is malfunctioning, preventing proper status indication to the driver.
Common Causes
40%
Burned-out or failed LED on the instrument panel or switch assembly
30%
Open circuit in the LED driver wire between the module and the indicator
20%
Corroded or loose connector at the LED or module end
10%
Module internal LED driver transistor failure
Diagnostic Steps
1
Step 1: Verify the LED is visually not illuminating when it should be (compare to expected behavior during system self-test at key-on).
2
Step 2: Measure voltage at the LED connector while the module is commanding it on. Expected 5-12V depending on circuit design.
3
Step 3: Check LED continuity with a multimeter (typical forward resistance 1-3 ohms). Replace if open.
4
Step 4: Verify wiring continuity from the module LED driver output to the LED connector.
5
Step 5: If wiring and LED are good, the module's internal driver may be at fault. Check for updated module software or replacement.
Estimated Repair Cost
$30 - $200
Parts + labor, varies by vehicle and location
The chassis control module has detected a circuit failure in LED indicator #1. This LED provides visual feedback to the driver regarding a chassis system status (such as air suspension mode, stability control, or ride control). The LED cannot illuminate or is malfunctioning, preventing proper status...
The most common cause of C1920 (Led #1 Circuit Failure) is: Burned-out or failed LED on the instrument panel or switch assembly
Typical repair costs for C1920 range from $30 to $200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
While the LED failure itself is not dangerous, the driver loses a visual indicator for a chassis system status. This could mean missing a warning about a more serious underlying condition.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1920 to identify the root cause.
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Quick Info
Category
Chassis
System
Chassis Indicator / Warning System
Difficulty
Type
Manufacturer
Recommended Tools
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