Code Definition

C1161 — Air Pressure Low Circuit Short to Gnd

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

About C1161

C1161 is a manufacturer-specific chassis diagnostic trouble code. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

When C1161 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit; and a signal or supply voltage lower than the expected operating range.

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.

C1161 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

This code applies to systems that monitor air pressure, such as air suspension or a pneumatic brake or accessory system, using a pressure switch or sensor that signals the control module when air pressure is low. DTC C1161 sets when the module detects that the air pressure low circuit is shorted to ground, which holds the input in the low or active state regardless of the actual system pressure. A short to ground keeps the circuit pulled low, so the module can no longer read the true air pressure condition and assumes a constant low pressure warning. When this code is set, the affected system ...

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