Code Definition

P2147 — Injector Cylinder 1 Control Circuit Low Voltage

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

About P2147

P2147 is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for Holden vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P2147 is stored, the module has detected a signal or supply voltage lower 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 P2147 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 Engine Control Module (ECM) controls fuel injector operation by switching the injector control circuit to ground and monitors the circuit for the correct voltage response. DTC P2147 is set when the ECM detects a voltage on the injector cylinder 1 control circuit that is lower than the calibrated threshold when the injector is commanded off. This indicates an unintended ground condition or excessive circuit load that prevents the injector from being correctly controlled. When set the driver may notice a misfire on cylinder 1, rough idle, hesitation or reduced power, with the malfunction ind...

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