Code Definition

C1284 — Oil Pressure Switch Failure

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

About C1284

C1284 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.

C1284 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

On vehicles where the chassis or ABS control module monitors a hydraulic pressure switch (typically the power steering pressure switch used to coordinate idle compensation with the engine control module, or a brake hydraulic accumulator pressure switch on traction control equipped vehicles) the module reads the switch state to confirm hydraulic pressure status. DTC C1284 sets when the controlling module detects an open or stuck signal from the monitored pressure switch, the switch fails to change state during commanded events, or the pressure feedback does not match the expected pump or steeri...

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