P1247 - Turbo Boost Pressure Low

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

  • Damaged MAP hose
  • Low turbo boost
  • Intake manifold or crossover tube hose leaks
  • Faulty MAP sensor
  • Faulty Powertrain Control Module (PCM)

Possible symptoms

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

P1247 Description

The boost pressure sensor responds to pressure changes in the intake manifold. This pressure is created by the turbocharger and changes with Accelerator Pedal Position (APP) and engine speed. The Powertrain Control Module (PCM) uses this information to assist in diagnosis of the barometric pressure (BARO) sensor and to provide engine overboost protection. The boost pressure sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The PCM supplies 5 volts to the boost pressure sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. The boost pressure sensor provides a signal to the PCM on a signal circuit relative to the pressure changes. The PCM monitors the boost pressure sensor signal for voltage outside of the normal range. The PCM calculates a predicted value for the boost pressure sensor. The PCM then compares the predicted value to the actual signal.
OBDII Code P1247 - Turbo Boost Pressure Low - AutoCodes.com

P1247 Information for specific makes

  • P1247 ACURA Accelerator Pedal Position Sensor 2 Circuit Malfunction
  • P1247 AUDI Needle Lift Sensor Circuit Open/Short To Positive
  • P1247 FORD Turbo Boost Pressure Low
  • P1247 HONDA Accelerator Pedal Position Sensor 2 Circuit Malfunction
  • P1247 ISUZU Low Fuel Pressure Regulator Circuit Low Voltage
  • P1247 MITSUBISHI A/T Plausibility
  • P1247 SAAB Intake Manifold Air Control Solenoid Inner Flap Open Circuit/Short To Positive
  • P1247 VOLKSWAGEN Needle Lift Sensor Circuit Open/Short To Positive

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