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 tried to adjust the throttle (the part that controls how much air goes into the engine) after it was replaced, but it couldn't do it.
The vehicle's engine control module (ECM) is unable to successfully perform the throttle valve adaptation process after the throttle body has been replaced.
The P163B code is triggered when the ECM detects that it cannot complete the throttle valve adaptation process after a throttle body replacement. This process is necessary to ensure the throttle operates correctly and efficiently. The adaptation procedure involves the ECM learning the new throttle body's range of motion and idle position.
• Check Engine Light is on
• Poor engine performance
• Erratic idle or stalling
• Improper installation of the throttle body
• Faulty throttle body
• ECM software issues
ECM: Engine Control Module
Throttle Body: A component that controls the amount of air entering the engine
• Verify the throttle body was installed correctly.
• Check for any software updates for the ECM.
• Perform a throttle body adaptation procedure using a scan tool.
• Reinstall the throttle body correctly.
• Update the ECM software if necessary.
• Perform throttle valve adaptation using a scan tool.
• OBD-II scan tool
• Throttle body alignment tool
• Basic hand tools
$150 - $500
Moderate
• Volkswagen Jetta
• Audi A4
• Skoda Octavia
• Ensure proper installation of throttle body components.
• Regularly update ECM software.
• Perform regular maintenance checks.
Engine Performance
• If you notice your car idling roughly or stalling, get it checked.
• Ensure any replaced parts are installed by a professional.
Check with your vehicle manufacturer for warranty coverage on ECM and throttle body components.
This code has been more common in vehicles with electronic throttle control systems, especially after throttle body replacements.
Moderate – While the vehicle may still be drivable, performance issues can worsen over time.
Driving with this code may lead to increased emissions and reduced fuel efficiency.
• Engine at operating temperature
• Vehicle in a safe and stationary position
The throttle body is typically located between the air filter and the intake manifold.
Q: Can I drive with a P163B code?
A: While you may be able to drive, it's best to address the issue to avoid performance problems.
Q: What happens if I ignore this code?
A: Ignoring the code can lead to poor engine performance and increased fuel consumption.
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