Code Definition

P068A — ECM Power Relay Load Circuit: De-Energised Performance Too Early

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

About P068A

P068A 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 P068A is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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 P068A 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

The ECM power relay, often called the main relay, supplies battery power to the engine control module and is held closed by the ECM for a period after the ignition is switched off so the module can complete its shutdown routines and store adaptations. DTC P068A sets when the ECM detects that this relay has opened and removed power earlier than the strategy expects. Losing power too soon can interrupt memory storage and cause hard starting, stalling, or a no start condition. When the code is set the ECM may log related power or keep alive faults and the driver can experience intermittent no sta...

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