P0192: Fuel Rail Pressure Sensor A Circuit Low

What does P0192 mean?

The rail-pressure sensor A signal is below its permitted voltage range. A low signal can be electrical even when fuel pressure is normal. The sensor is a feedback device; it does not create fuel pressure.

Generic OBD-II definition: Fuel Rail Pressure Sensor A Circuit Low. Confirm applicability in your vehicle service information.

Common causes

• Signal shorted to ground
• Internally failed pressure sensor
• Damaged supply or connector

Symptoms

• Extended cranking or no start
• Loss of power
• Check engine light

Diagnostic focus

A pressure reading pinned at its low limit may be a signal fault. Do not replace the fuel pump on that reading without first validating the sensor circuit.

Can I keep driving with P0192?

Severity: High Avoid driving if the engine stalls, leaks fuel, or runs roughly. High-pressure fuel testing belongs with a qualified technician; never loosen a fuel rail or injector pipe to check pressure.

If the check engine light is flashing or the car runs badly, stop driving and have it checked.

Typical fixes

• Inspect the pressure-sensor plug and harness
• Check the signal for a ground short and verify sensor supply and return circuits.
• Verify the repair against desired and actual pressure readings

Sources & review

• OBD-Codes.com: P0192
• TroubleCodes.net: generic code definitions

Definitions and diagnostic background checked 2026-11-06. Generic guidance, not a substitute for the service procedure for your exact year, engine, and transmission.