P0092
Fuel Pressure Regulator Control Circuit High
Powertrain Fuel and Air Metering Fuel pressure control 🟡 Moderate — Fix within a week
💬
What This Actually Means
In plain language — no jargon

The ECU detected abnormally high voltage in the fuel pressure regulator control circuit, like a stuck accelerator pedal signal that won't come back down. This prevents the regulator from properly controlling fuel pressure, disrupting the engine's fuel delivery.

⚡
Symptoms You May Notice
3 known symptoms for this code
Engine hesitation or surging during acceleration
Hard starting or rough idle
Poor fuel economy and potential black smoke from exhaust
🔬
Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors voltage feedback from the fuel pressure regulator solenoid control circuit. It expects voltage to cycle within a normal operating range as it commands the regulator open and closed. A persistently high voltage reading indicates a circuit fault, open wire, or failed solenoid.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Regulator Control Voltage 0.5–4.5 volts (cycling) Above 4.7 volts sustained
Circuit Resistance 2–8 ohms Above 15 ohms or open circuit
🔧
Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Fuel pressure regulator connector
Inspect and reseat the connector to the fuel pressure regulator; corrosion or loose pins often cause high-voltage faults.
2
Wiring harness to regulator
Check for damaged, pinched, or corroded wires between the ECU and regulator using a multimeter to test continuity.
3
Fuel pressure regulator solenoid
If wiring is sound, replace the fuel pressure regulator as the solenoid coil has likely failed internally.