P0A18 — Motor Torque Sensor Circuit Range/Performance

Motor torque-sensor circuit: The monitored response fails its expected range or performance relationship, rather than specifying one failed component. The sensed torque channel is not the same as commanded torque or an engine misfire. Identify the motor and controller; this label does not authorize work on high-voltage components.

Affected system: Motor torque sensing

Symptoms

• System warning may illuminate
• Affected feature may be unavailable
• Symptoms depend on the vehicle

Possible causes

• Hybrid powertrain sensor, actuator, power supply, connector, or control issue
• Module power, ground, or connector fault
• Vehicle-specific mechanical or control issue

What to check

• Record all available module faults
• Record hybrid and electric powertrain module faults with a compatible scan tool. Check the specified low-voltage supplies and module data first; follow vehicle-specific high-voltage safety procedures for further diagnosis.
• Compare results with vehicle-specific service information
• Verify the repair
• Record hybrid and electric powertrain module faults with a compatible scan tool. Check the specified low-voltage supplies and module data first; follow vehicle-specific high-voltage safety procedures for further diagnosis.
• Repair the verified cause and rescan all affected modules

Also written as: P0A18-00, P0A1800, POA18 (some scan tools add the fault-type byte, e.g. -00).