Fuel Rail Pressure Sensor Circuit Low Input
The P0192 code means the vehicle's onboard diagnostic system has detected: Fuel Rail Pressure Sensor Circuit Low Input. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- medium
- Estimated cost
- $80-$300
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Common Symptoms
- Check Engine Light on
- Engine hard to start
- Stalling
- Poor acceleration
- Lean running condition
Probable Causes (Ranked by Likelihood)
- Fuel rail pressure sensor shorted to ground Very High
- Open or short in sensor wiring High
- Very low actual fuel pressure causing minimum sensor reading Moderate
Step-by-Step Diagnostic Procedure
-
Check fuel rail pressure sensor voltage. Below 0.3V at key-on indicates a low input fault.
-
Disconnect sensor: if voltage rises to 5V, sensor is shorted.
-
Check wiring for ground shorts.
-
Verify actual fuel pressure with a mechanical gauge.
Common Fixes by Vehicle
What techs usually find when diagnosing P0192 on specific vehicles — tap your vehicle for the fix and the exact part:
2011-2020 Ford F-150/Explorer 3.5L EcoBoost easy DIY
Low input from the fuel rail pressure sensor means the signal voltage is below the expected minimum. This is usually a wiring issue -- check the 3-wire connector at the sensor for corroded pins, spread terminals, or a damaged wire. The ground wire is especially prone to corrosion on EcoBoost engines. If wiring checks out, the sensor's internal element has failed and it needs replacement.
Labor: 15-30 min2011-2019 Hyundai Sonata/Tucson 2.0T GDI easy DIY
Hyundai GDI fuel rail pressure sensor low input can be caused by a faulty sensor or an actual low fuel pressure condition. Check the high-pressure fuel pump output first using a scan tool to monitor desired vs. actual fuel pressure. If actual pressure is genuinely low, the HPFP is failing. If actual pressure is normal but the sensor reads low, replace the sensor. The sensor is on the passenger-side fuel rail.
Labor: 15-30 min2013-2020 Ford Escape/Fusion 1.5L/2.0L EcoBoost easy DIY
On the smaller EcoBoost engines, check the fuel rail pressure sensor connector for pushed-out pins. Ford uses a snap-lock connector that can partially disengage from vibration. Push the connector in firmly until it clicks. If the connector is secure, backprobe the signal wire and compare to scan tool reading. A mismatch indicates wiring damage between the sensor and the PCM.
Labor: 15-30 minFrequently Asked Questions
How dangerous is low fuel rail pressure?
Very low pressure causes lean running that can damage pistons and valves. On direct injection engines, insufficient pressure also causes incomplete atomization and carbon buildup on valves.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0192 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
See All Codes & Fixes for Your Vehicle
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