Steering angle sensor calibration lost after battery disconnection, module replacement, or low voltage event; Faulty steering angle sensor or its internal optical or magnetic element; Damaged or chafed wiring harness between the sensor and the stability control module; Corroded or loose electrical connector at the sensor or control module; Steering column or clock spring replacement without performing the required calibration procedure; Wheel alignment performed without resetting the steering angle sensor zero point; Failed or failing stability control module that cannot store or process the calibration data

DTC codes / C08xx · Brakes, steering and suspension / C0805

C0805Steering Angle Sensor Calibration

Q: What does code C0805 mean?

Steering Angle Sensor Calibration. C0805 indicates that the steering angle sensor, which reports the steering wheel's position and rate of turn to the stability control system, has failed its calibration routine or lost its learned center point. The computer detects this when the sensor's voltage or data stream falls outside the expected range during a calibration attempt, or when the learned zero position is missing or corrupted in memory.

C0805 indicates that the steering angle sensor, which reports the steering wheel's position and rate of turn to the stability control system, has failed its calibration routine or lost its learned center point. The computer detects this when the sensor's voltage or data stream falls outside the expected range during a calibration attempt, or when the learned zero position is missing or corrupted in memory.

SystemChassis

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaBrakes, steering and suspension

Symptoms you may notice

Traction control and stability control warning lights illuminated on the dashboard
Steering angle sensor fault message or chassis control system warning displayed
Electronic stability control (ESC) system disabled, with the vehicle reverting to normal braking only
Often no symptoms besides the warning light, with the vehicle driving normally
Slightly off-center steering wheel or a pull that was not present before the light appeared
In some cases, a brief stability control intervention or warning chime during low-speed turns

Common causes, most likely first

Steering angle sensor calibration lost after battery disconnection, module replacement, or low voltage event
Faulty steering angle sensor or its internal optical or magnetic element
Damaged or chafed wiring harness between the sensor and the stability control module
Corroded or loose electrical connector at the sensor or control module
Steering column or clock spring replacement without performing the required calibration procedure
Wheel alignment performed without resetting the steering angle sensor zero point
Failed or failing stability control module that cannot store or process the calibration data

How to diagnose and fix it

Connect a scan tool and read all chassis control module codes to confirm C0805 is current and not history
Verify battery voltage and charging system health, as low voltage commonly aborts calibration routines
Inspect the steering angle sensor connector and wiring for corrosion, looseness, or chafing
Perform the manufacturer's steering angle sensor calibration procedure with the scan tool, following the exact drive cycle and centering steps
If calibration fails, check live steering angle data while turning the wheel to confirm the sensor reports smoothly and returns to zero
Replace the steering angle sensor or clock spring assembly if live data is erratic or absent, then recalibrate
If the sensor and wiring test good but calibration still fails, diagnose the stability control module and its power and ground circuits

Why calibration fails after simple repairs

A dead battery or a jump start is one of the most common triggers for C0805, because the stability control module loses its learned steering center point when voltage drops during cranking.
Many technicians replace the steering angle sensor when the real fault is a wheel alignment that was performed without resetting the sensor zero point, leaving the computer convinced the wheel is turned when it is straight.
The steering angle sensor often shares a connector or ground circuit with the clock spring and horn, so a horn that stops working or an airbag light alongside C0805 points to a column wiring fault rather than the sensor itself.
Some vehicles require the calibration to be completed with the wheels perfectly straight and the steering wheel held centered within a narrow tolerance, and a steering wheel that is one spline off will cause the routine to fail repeatedly.
C0805 can be stored as a history code after a successful calibration, so clearing codes and verifying the light stays off through a full drive cycle is essential before condemning any part.

Can I keep driving with C0805?

The vehicle remains safe to drive in most cases because the stability control system simply disables itself, but you should avoid aggressive steering inputs or slippery conditions until the fault is repaired. Do not ignore the warning light, as a failed calibration can mask a real steering sensor fault that affects stability control when you need it most.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.