C1A41

Code

Generic C — Chassis

Steering Angle Sensor Circuit Intermittent

Brand: Generic

Type: C — Chassis

Views: UK: 5 EN: 16 RU: 7

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Page language: EN

Causes

Loose or corroded connector at the steering angle sensor or control module
Damaged, chafed, or broken wiring harness in the steering column
Intermittent internal failure of the steering angle sensor
Poor ground or reference voltage interruptions
Intermittent communication fault on CAN/LIN bus (if sensor transmits digitally)
Poor sensor mounting or physical damage to sensor (aftermarket parts or impacts)

Symptoms

Intermittent stability control (ESC/ESP) or ABS warning lamp illumination
Intermittent steering/traction assist anomalies or warnings
Steering angle readout fluctuates or re-centers incorrectly in scanner/live data
Occasional loss of functions that depend on steering angle (lane assist, adaptive systems)
DTC stored as intermittent; may not be present continuously

What to check

Read fault memory and freeze-frame data; note conditions (speed, temperature, steering angle) when fault occurred
Visually inspect sensor connector and wiring for corrosion, bent pins, damage or loose latch
Perform wiggle test of harness and connector while monitoring live sensor data or DTC status
Check reference voltage and ground at the sensor connector with engine on and key on as required
Scan for related codes (ABS, ESC, power steering, CAN/LIN communication faults) and module network errors
Measure signal with a scope if available to identify dropouts, noise, or intermittent pulses

Signal parameters

Reference voltage: typically ~5 V (check vehicle spec)
Signal type: may be analog (0.5–4.5 V) or digital (CAN/LIN message) depending on design
Expected signal behavior: smooth change proportional to wheel/steering angle; no sudden dropouts
Update rate: sensor message or analog update typically multiple times per second (10–100 Hz) depending on system
Common resistance/current: low circuit resistance; current draw normally small (check OEM spec)

Diagnostic algorithm

Retrieve all stored DTCs from all modules and record freeze frame / live data related to the event.
Reproduce condition: perform a short road test or steering oscillation test while monitoring live steering angle data to try to make the fault appear.
Visually inspect the steering angle sensor connector, wiring through the steering column, and harness routing for damage, rubbing points, or pinch locations.
With harness accessible, perform a wiggle test of the wiring and connectors while watching live data or DTC status to locate intermittent contact.
Measure reference voltage and ground at the sensor connector with a multimeter. Verify values against manufacturer spec; check for intermittent loss while moving the column.
If signal is analog, use an oscilloscope to capture the sensor output while turning the wheel and while applying vibration to the harness to detect dropouts or noise spikes.
If sensor is digital, monitor CAN/LIN traffic for missing or corrupted messages and check for bus errors or low voltage on bus lines.
Repair any found wiring/connector faults: clean corrosion, repair/replace damaged wires, secure connectors, or replace broken retaining clips. Re-test.
If wiring and connectors test good and intermittent continues, swap or replace the steering angle sensor (or module) per workshop procedures and re-evaluate.
After repair, clear DTCs and perform a calibration/initialization procedure for the steering angle sensor if required by the vehicle. Road test to confirm fault does not return.

Likely causes

Connector pin pushed out, bent, or contaminated causing intermittent contact
Wire insulation abrasion causing intermittent short to chassis or power
Loose steering column components causing intermittent connector movement
Intermittent open on reference 5 V or signal return (ground) circuit
Failed sensor electronics that works sporadically as temperature or vibration changes
Intermittent ECU/module input circuit or poor solder joint inside module

Fault status

⚠️ Status

Intermittent steering angle sensor circuit fault detected — stored as intermittent. Monitor and retest after repairs; fault may not be active continuously.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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