Code Definition

P0A16 — Engine mount control circuit A high

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0A16

P0A16 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0A16 is stored, the module has detected a signal or supply voltage higher than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0A16 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

This DTC is set when the control module detects a voltage level in Engine Mount Control Circuit A that exceeds the calibrated upper threshold. This typically indicates a short-to-voltage condition, an open ground, or an internal fault in the active engine mount system. The circuit controls electronically adjustable engine mounts designed to reduce engine vibration under varying operating conditions.

Quick Facts