Engine-Codes - Generic - P1247

P1247 - Turbo Boost Pressure Low

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P1247 Possible Causes

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

How is the P1247 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P1247 code

Labor: 1.0

The cost to diagnose the P1247 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

P1247 Meaning

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.

More Information

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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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