P0091Medium SeverityFuel System

Fuel Pressure Regulator Control Circuit Low

What This Means

The fuel pressure regulator control circuit is reading low voltage. A short to ground is preventing proper electronic fuel pressure regulation.

Common Symptoms

Fuel pressure too low
Engine stalling
Hard starting
Check engine light on

Common Causes

Short to ground in wiring
Failed regulator solenoid
Corroded connector
Damaged harness
PCM ground fault

Estimated Repair Cost

$150 – $700

Parts and labor (varies by vehicle and location)

Difficulty:Moderate

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.