Code Definition

P2068 — Fuel Level Sensor 2 Circuit High Voltage

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

About P2068

P2068 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 P2068 is stored, the module has detected a signal or supply voltage higher than the expected operating range; and a sensor-related fault — the reported value from the named sensor is out of spec.

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 P2068 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) monitors the fuel level sensor 2 signal to determine fuel quantity, typically in vehicles equipped with a saddle style fuel tank using dual level sensors. DTC P2068 is set when the ECM detects a voltage from fuel level sensor 2 that is higher than the calibrated maximum for a specified period. This indicates an open circuit, high resistance, or short to battery voltage in the sensor signal circuit, causing the reported fuel level to be implausibly high. The driver may notice an inaccurate or stuck fuel gauge, a fuel gauge reading full incorrectly, and on some ve...

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