Code Definition

P0192 — Fuel Rail Pressure Sensor Circuit Low Input

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

About P0192

P0192 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 P0192 is stored, the module has detected a signal or supply voltage lower 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 P0192 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 P0192 fault code is set when the Engine Control Module (ECM) detects a lower than expected input signal from the fuel rail pressure sensor circuit. This sensor is important for monitoring the pressure in the fuel rail, essential for proper fuel injection and efficient engine operation. A low input signal may suggest an issue such as a faulty sensor, a short to ground in the sensor circuit, or problems with the wiring or connectors. Such a condition can lead to the ECM receiving inaccurate data about the fuel pressure, which might impact engine performance, including poor acceleration, roug...

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