Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected that the pressure difference in the engine isn't matching up with how much the gas pedal is being pressed. It's like the car is expecting more power when you press the pedal, but it's not getting it.
The P1147 code is triggered when the engine control module (ECM) detects a lower than expected differential pressure compared to the throttle angle. This can affect engine performance and efficiency.
The P1147 code indicates that the ECM has detected a discrepancy between the expected differential pressure and the actual pressure relative to the throttle angle. This could be due to issues with the intake manifold, throttle body, or related sensors.
• Reduced engine performance
• Poor acceleration
• Check Engine Light illuminated
• Faulty throttle position sensor
• Vacuum leaks in the intake manifold
• Clogged or malfunctioning air filter
Throttle Body: A component of the air intake system that controls the amount of air entering the engine.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the throttle position sensor and wiring.
• Check for vacuum leaks in the intake system.
• Replace the throttle position sensor if faulty.
• Repair any vacuum leaks found.
• Replace or clean the air filter if needed.
• OBD-II scanner
• Vacuum gauge
• Multimeter
$100 - $300
Moderate
• Nissan Altima
• Infiniti G35
• Nissan Maxima
• Regularly check and replace air filters.
• Maintain proper vacuum hose connections.
• Schedule routine throttle body cleaning.
Sensor Issue
• Avoid driving aggressively until the issue is resolved.
• Schedule a diagnostic check with a professional mechanic.
Check with your vehicle manufacturer for specific warranty coverage on engine sensors.
The P1147 code has been associated with throttle and intake system issues in various Nissan and Infiniti models.
Moderate – It's important to address this issue to avoid reduced engine performance and potential further damage.
Driving with a malfunctioning throttle system can lead to unsafe driving conditions. Address the issue promptly.
• Engine at operating temperature
• Vehicle in a stationary position
The throttle position sensor is typically located on the throttle body, which is connected to the intake manifold.
Q: Can I drive my car with a P1147 code?
A: It's not recommended as it can lead to poor performance and potential engine damage.
Q: Will a vacuum leak trigger a P1147 code?
A: Yes, a vacuum leak can cause a pressure imbalance, leading to this code.
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