Code Definition

C1819 — Air Suspension RR Air Compress Request Exceeded Max Timing

System: Chassis  |  Type: Manufacturer-Specific  |  Make: Ford

About C1819

C1819 is a manufacturer-specific chassis diagnostic trouble code recorded for Ford vehicles. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

C1819 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The air suspension control module monitors compressor run time whenever it commands the compressor to raise the right rear corner of the vehicle. DTC C1819 is set on Ford and Lincoln air suspension systems when a right rear air spring fill request causes the compressor to run longer than the maximum allowed time without the right rear ride height sensor confirming the corner has reached target height. The module interprets the excessive run time as a failure to achieve the commanded height, which usually points to an air leak, a worn compressor with low output, a blocked delivery path, or a he...

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