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P018B CADILLAC

P018B CADILLAC - Fuel Pressure Sensor 'B' Circuit Range/Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Fuel Pressure Sensor 'B'
  • Fuel Pressure Sensor 'B' harness is open or shorted
  • Fuel Pressure Sensor 'B' circuit poor electrical connection

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P018b Cadillac Description

The Powertrain Control Module (PCM) provides a 5-Volt supply to the Fuel Rail Pressure Sensor (FRPS). The PCM also provides a ground on the sensor return circuit. The Fuel Rail Pressure Sensor provides a signal to the PCM on the Fuel Rail Pressure Sensor Signal circuit. This sensor signal voltage changes based on the pressure in the fuel rail. The PCM will detect a low signal voltage at low rail pressures. The PCM will detect a high signal voltage during high rail pressure conditions. The PCM will light the MIL lamp immediately after the diagnostic runs and fails. During this time the customer may experience a power and or speed derate. The PCM will turn off the MIL light after the diagnostic runs and passes in four consecutive drive cycles.
OBDII Code P018b Cadillac - Fuel Pressure Sensor 'B' Circuit Range/Performance - AutoCodes.com

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