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Home/DTC Codes/Lincoln/MKX/2014-2014 3.7L V6/P0191
P0191

Fuel Rail Pressure Sensor Circuit Range/Performance

2014-2014 Lincoln MKX 3.7L V6

Moderate SeverityPowertrainGeneric (SAE)

The 2014 Lincoln MKX is equipped with a 3.7L V6 engine. Below you'll find detailed p0191 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.

Description

The fuel rail pressure sensor reading is out of expected range.

Symptoms

  • Check Engine Light
  • Engine surge
  • Poor performance

Common Causes

  • Sensor fault
  • Fuel pressure issue
  • Restricted fuel line

Diagnostic Steps

  1. Compare sensor to mechanical gauge
  2. Check fuel pump
  3. Inspect fuel lines

Repair Notes

Replace sensor or repair fuel system.

Related Codes

P0087Fuel Rail/System Pressure - Too LowP0190Fuel Rail Pressure Sensor Circuit

Other Powertrain Codes

P0191 on Other Vehicles

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Common Questions

What does code P0191 mean on a 2014-2014 Lincoln MKX?

P0191 stands for "Fuel Rail Pressure Sensor Circuit Range/Performance". The fuel rail pressure sensor reading is out of expected range.

What are the symptoms of P0191 on a Lincoln MKX?

Common symptoms of P0191 include: Check Engine Light, Engine surge, Poor performance.

What causes P0191 on a 2014-2014 Lincoln MKX?

Common causes of P0191 include: Sensor fault, Fuel pressure issue, Restricted fuel line.

Last updated: March 2026

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