P0A16 — Engine Mount Control Circuit High

Active engine-mount control: The electrical input is above its permitted range. This is an electrical finding, not an instruction to replace the monitored component. This code names engine-mount control. The P0A prefix alone is not evidence that the traction battery or high-voltage drive system is defective.

Affected system: Active engine mounting

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: P0A16-00, P0A1600, POA16 (some scan tools add the fault-type byte, e.g. -00).