Electric Motor/Generator Position Sensor (Resolver) Fault

What this code means

The resolver sensor that determines rotor position in the motor/generator is reporting erratic or no signal. Accurate position data is critical for motor control.

Symptoms

• Vehicle may be immobile
• Motor control erratic
• Harsh vibration from motor
• No electric drive
• Hybrid system warning
• Unexpected motor behavior

Common causes

• Resolver sensor failure
• Resolver wiring damage
• Electromagnetic interference
• Resolver air gap incorrect
• Resolver excitation circuit failure

Diagnostic steps

1. Read resolver angle data via scan tool
2. Check for resolver signal noise
3. Inspect resolver wiring and connectors
4. Measure resolver excitation voltage
5. Test resolver output signals

Repair notes

Replace resolver sensor. Perform rotor position calibration after replacement. Some designs require motor removal for resolver access.

Other Powertrain codes on this vehicle