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 noticed that too much air is getting into the engine when the car is idling. It's like if you were blowing up a balloon and too much air was going in, making it hard to control.
The engine control module (ECM) detects that the amount of air entering the engine at idle is more than expected, which can affect engine performance.
The P1103 code is triggered when the ECM detects an excessive amount of unmetered air entering the engine while the vehicle is idling. This can be due to leaks in the intake system or issues with the idle air control valve.
• Rough idle
• Engine stalling
• Check Engine Light illuminated
• Vacuum leaks in the intake system
• Faulty idle air control valve
• Dirty or faulty mass airflow sensor
ECM: Engine Control Module
MAF: Mass Airflow Sensor
• Inspect the intake system for vacuum leaks.
• Check the idle air control valve for proper operation.
• Test the mass airflow sensor for proper readings.
• Repair any vacuum leaks found in the intake system.
• Clean or replace the idle air control valve if faulty.
• Clean or replace the mass airflow sensor if necessary.
• OBD-II scanner
• Vacuum leak detector
• Multimeter
$100 - $300
Moderate
• Volkswagen Golf
• Audi A4
• BMW 3 Series
• Regularly inspect and maintain the intake system.
• Keep sensors clean and free of debris.
• Perform regular engine tune-ups.
Engine Performance
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been associated with intake system issues in vehicles with electronic throttle control systems.
Moderate – It should be addressed soon to prevent potential engine performance issues.
Driving with this issue may not comply with emissions regulations and could lead to increased emissions.
• Engine at operating temperature
• Vehicle at idle
The idle air control valve is typically located on the throttle body of the engine.
Q: Can I drive with a P1103 code?
A: It's possible to drive short distances, but it's best to have the issue fixed soon to avoid engine performance problems.
Q: How do I know if my idle air control valve is bad?
A: Symptoms of a bad idle air control valve include rough idling, stalling, and a check engine light.
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