OBD-II Fault Code

C1161: Air Pressure Low Circuit Short to Gnd

Meaning, symptoms, likely causes, diagnostic checks and repair guidance for C1161.

System family

Chassis

Manufacturer-specific

Repair category

Electrical circuit / sensor

Use this category to narrow your checks before replacing parts.

Severity

Medium

Severity is a general guide. Confirm with scan-tool data and vehicle symptoms.

What C1161 usually means

Air Pressure Low Circuit Short to Gnd.

Common symptoms

ABS/traction/steering/suspension warning lamp or abnormal chassis behaviour

Likely causes

Low signal voltage; Weak power supply; High resistance/poor ground; Failed sensor

Diagnostic checks

Inspect wheel/brake/suspension area, connectors, sensor wiring and module power/ground; Check sensor reference voltage, ground and signal voltage

Repair guidance

Repair poor ground/power feed or replace confirmed faulty sensor

Verification after repair

Clear code, road-test safely at low speed first, then rescan

Note: Confirm vehicle make/model/year because manufacturer-specific codes can vary; Manufacturer-specific: confirm definition and test steps in the vehicle service manual. A DTC identifies a circuit or system condition, not always the failed part.