EPS Motor Position Sensor Signal Failure
Code C1441 indicates that the Electric Power Steering (EPS) control unit is not receiving the Phase A signal from the motor position sensor (resolver) or the motor drive circuit. This prevents the ECU from determining the exact rotor position, causing the power steering assist to be disabled and the EPS warning light to illuminate.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty or contaminated motor position sensor (resolver)
- Open, short-to-ground, or short-to-battery in Phase A wiring or connectors
- Internal failure of the EPS motor
- Defective EPS control unit
- Low battery voltage or voltage spikes corrupting the signal
3. Symptoms You Will Notice
- EPS warning light on dashboard
- Loss of power steering assist (heavy steering)
4. Step-by-Step Diagnosis
Check battery voltage and charging system for proper operation
Inspect Phase A circuit wiring and connectors for damage, corrosion, or loose connections
Test the resolver sensor resistance and signal output per manufacturer specs
Verify EPS motor integrity and check for internal shorts
If all else passes, replace the EPS control unit
5. Frequently Asked Questions
Is it safe to drive?▼
No, driving with code C1441 is not safe because power steering assist may fail suddenly, making steering difficult and increasing the risk of an accident. Have the vehicle towed to a repair shop.
How much does it cost to fix?▼
Repair costs typically range from $200 to $1,200, depending on the root cause. A simple wiring repair may cost $200–$400, while replacing the EPS motor or control unit can run $800–$1,200.