OBD-II Fault Code

C1900: Steering VAPS II Circuit Loop Short To Ground

Meaning, symptoms, likely causes, diagnostic checks and repair guidance for C1900.

System family

Chassis

Manufacturer-specific

Repair category

Steering system

Use this category to narrow your checks before replacing parts.

Severity

High

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

What C1900 usually means

Steering VAPS II Circuit Loop Short To Ground.

Common symptoms

ABS/traction/steering/suspension warning lamp or abnormal chassis behaviour; Steering warning lamp or heavy/abnormal steering

Likely causes

Low voltage; Steering angle/torque sensor fault; Power steering motor/module issue; Wiring fault; Wire shorted to chassis/ground; Internal component short

Diagnostic checks

Inspect wheel/brake/suspension area, connectors, sensor wiring and module power/ground; Check battery/charging system; Calibrate steering angle sensor if required after repair/alignment; Inspect harness for rubbing/pinch points and check resistance to ground

Repair guidance

Repair wiring/power supply, perform calibration, replace failed sensor/module after confirmation; Repair insulation/harness damage or replace internally shorted component

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.