Bad idle air control valve
Controls engine idle speed for stable operation.
Costs
Every car issue can be caused by different things. Here are the most common ones
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Most Expensive
Moderate costs
Moderate costs
Moderate costs
Moderate costs
Moderate costs
Cheapest case
Discussions
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Details
Probability
Based on the values and symptoms you have entered, a crude estimation of the probability of this problem can be made
HIGH
Typical consequences
If this defect is detected, it may lead to the following problems:
- Changed driving behavior
- Failure of the exhaust emission test (Failure to pass the exhaust emission test)
Functionality idle control
When a vehicle is idling, a predefined speed is monitored and controlled by the engine control unit. Deviations are detected and corrected, and an error is stored in the event of failure. The idle control valve, a bypass air valve, is responsible for regulating the engine speed when the vehicle is stationary.
When there is a sudden change in engine speed due to the use of air conditioning or other electrical loads, additional air and fuel demand is recorded. If the engine speed drops below a setpoint, the valve is activated, increasing air flow and simultaneously extending the opening time of the injectors for adjustment.