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Air flow sensor replacement
The main reasons why a driver should replace the mass air flow sensor:
- The quality of engine operation is improved: A non-working sensor leads to misfires, as a result of problematic engine operation at idle and during acceleration. Replacing the sensor prevents potentially dangerous engine problems such as detonation or overheating.
- Complete combustion of fuel: Incorrect sensor readings can result in a lean or rich fuel mixture, which reduces engine efficiency and increases fuel consumption. When the air flow sensor produces a weak signal, fuel consumption can increase by up to 20%. The correct air to fuel ratio is very important for efficient combustion.
- Reduced emissions: Proper operation of the air flow sensor reduces emissions as the engine burns fuel optimally. Many modern vehicles must meet stringent environmental standards, and a properly functioning air flow sensor is key to meeting these regulations.
- Increasing the service life of the catalyst: An incorrect air-to-fuel ratio puts increased stress on the catalyst, thereby accelerating its wear.
- Improved Vehicle Dynamics: Correct sensor readings provide better vehicle acceleration responsiveness and smoother handling, especially when driving at high speeds. Engine idle performance improves because a faulty sensor causes the amount of air supplied to the engine compartment to be unstable, causing the mixture to burn inside the cylinders in excess or deficiency, which directly affects engine performance.
- Stability and Traction System Performance: In modern vehicles, stability and traction control systems take sensor data to optimize engine performance under various driving conditions.
- Stable and Smooth Automatic Transmission Operation: For vehicles with automatic transmission, correct sensor readings are important for smooth gear shifting.
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Check Engine Light
The yellow check engine light commonly warns that the engine releases more emissions than expected, often due to a catalytic converter failure. This causes engine misfires, poor fuel mileage, low power, and more. But there are alternative common causes for this issue.
The most common causes for the Check Engine light are:
- Engine misfire: When an engine misfires, it fails to ignite the air-fuel mixture properly, leading to a loss of power and rough running. The onboard diagnostics system detects this issue and triggers the check engine light.
- Evaporative emission leak: An evaporative emission (EVAP) leak can cause the check engine light to illuminate because it disrupts the vehicle's emissions control system. A leak in the EVAP system, allows fuel vapor to escape, leading to increased emissions.
- Loose gas cap: If the gas cap is not properly tightened or is missing, it can allow fuel vapors to leak out, triggering the check engine light.
- Faulty airflow sensor: The airflow sensor measures the amount of air entering the engine to help the system adjust the fuel injection for a perfect air-fuel mixture. If the sensor fails, it'll cause a bad mixture and trigger the check engine light.
- Faulty catalyst: The catalytic converter converts harmful gases into less harmful emissions. If the catalyst is faulty, it increases emissions and triggers the check engine light.
- Lean codes: Lean codes can cause the check engine light to illuminate because they indicate a problem with the air-fuel mixture in the engine. A lean condition occurs when there is too much air and not enough fuel in the air-fuel mixture, leading to incomplete combustion.
- Faulty variable valve timing (VVT): The VVT system controls the timing of the opening and closing of the engine's valves. If the VVT system is faulty, it may not operate correctly, leading to issues such as rough idle, reduced power, and increased emissions, triggering the check engine light.
Stay alert if the check engine lights up on your car's dashboard. Your vehicle might be under progressive damage and can end up requiring hefty repairs in the future; it'll also show considerable fuel loss. So please, keep track of your car's odd behaviors and browse through our articles to find out the information you'll need to share with your go-to auto shop.
Other Vehicle Symptoms
Below are just a few examples of typical Symptoms and Fixes your car might be experiencing
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