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• 26.

  Does GPF require fluid?

  Gasoline particulate filters (GPFs) are primarily used to capture and reduce particulate emissions from gasoline-powered vehicles. Unlike diesel vehicles equipped with SCR systems, which require AdBlue (diesel exhaust fluid), petrol vehicles equipped with GPF generally do not require additional fluid to operate.
  However, it is important to note that the GPF requires periodic regeneration to burn off the accumulated particulate matter.This regeneration process usually occurs automatically under normal driving conditions when exhaust temperatures rise high enough to burn off trapped particles. Therefore, most gasoline vehicles equipped with GPF do not require a separate regeneration fluid.
  Nonetheless, it is vital to follow the manufacturer's recommendations for maintenance and servicing to ensure that the GPF system functions properly and complies with emissions regulations. If you suspect there are any issues with your vehicle's GPF, it is recommended that it be inspected by a qualified technician.
  
• 27.

  What happens if I disable AdBlue?

  Disabling the AdBlue system in vehicles equipped with Selective Catalytic Reduction (SCR) technology can have several consequences:
  ① Emission non-compliance: AdBlue is an important part of the SCR system, which helps reduce harmful nitrogen oxide (NOx) emissions in vehicle exhaust. Disabling the AdBlue system will result in increased NOx emissions, causing air pollution and environmental damage. In regions with strict emissions regulations, driving a vehicle with a disabled AdBlue system may result in legal consequences, fines, or even vehicle seizure.
  ② Engine performance issues: Modern diesel engines are calibrated to work with the AdBlue system. Disabling AdBlue may cause engine performance issues, including reduced power, reduced fuel efficiency and increased exhaust smoke.
  ③ Check Engine Light: Disabling the AdBlue system may trigger the vehicle's onboard diagnostic system, causing the Check Engine Light to illuminate. This may indicate a malfunction in the emissions control system and the vehicle may fail an emissions check or require repairs to correct the problem.
  ④ Warranty Void: Tampering with the emission control system (including disabling the AdBlue system) will void the vehicle warranty. If any related components fail or are damaged due to disabling the AdBlue system, the repair costs may not be covered by the manufacturer's warranty.
  ⑤ Long-term engine damage: Operating a vehicle with a failed AdBlue system will result in increased wear on engine components, which may ultimately lead to expensive repairs or premature engine failure over time.
  In summary, disabling the AdBlue system in vehicles equipped with SCR technology is not recommended for legal, environmental and mechanical reasons. The AdBlue system must be properly maintained to ensure compliance with emissions regulations, maintain engine performance and avoid potential legal and financial liabilities.
  
• 28.

  How do I know if my AdBlue injector is leaking?

  Detecting whether an AdBlue injector is leaking requires some observation and inspection. Here are some signs to look out for:
  ① Visible leaks: Check the AdBlue injector and surrounding area for visible signs of leaks. AdBlue is a clear, colorless liquid, so check for puddles or water droplets under the injector or along the AdBlue supply line.
  ② Strong Odor: AdBlue has a distinctive smell similar to ammonia. If you notice a strong smell of ammonia in the area around the injector, it may indicate a leak.
  ③ Low AdBlue level: Keep an eye on the AdBlue level in your vehicle's tank. If you notice a significant drop in the AdBlue level but no corresponding increase in mileage, this could be a sign of a leak in the injector or supply line.
  ④ Check Engine Light: A leak in the AdBlue injector or supply system can trigger the vehicle's onboard diagnostics system, causing the Check Engine Light to illuminate. If the Check Engine Light illuminates, the vehicle must be inspected by a mechanic to determine the cause.
  ⑤ Poor performance or efficiency: AdBlue injector leaks can affect the performance and efficiency of your vehicle’s emission control system. If you notice a drop in fuel efficiency or a loss of power, it could be due to an AdBlue system leak.
  If you suspect your AdBlue injector is leaking, it is important to address it promptly to prevent further damage to the emissions control system and ensure compliance with emissions regulations. A qualified mechanic or technician can inspect the injectors and repair any leaks found.
  
• 29.

  Why won't my AdBlue sensor reset?

  Troubleshooting an AdBlue sensor can be a little tricky, but here are a few common reasons why it may not reset:
  ① Sensor failure: The sensor itself may be faulty or damaged. In this case, the sensor needs to be replaced.
  ② Low AdBlue level: Make sure the AdBlue tank is full. Some vehicles will not allow the sensor to reset if the AdBlue level is below a certain threshold.
  ③ Software or firmware issues: Sometimes, a software glitch or outdated firmware can prevent the sensor from resetting correctly. Updating your vehicle's software or firmware may resolve this issue.
  ④ Wiring or connection problems: Check the sensor's wiring and connections to make sure they are secure and free of damage or corrosion. Poor connections can cause sensor failure.
  ⑤ Control module fault: The control module responsible for managing the AdBlue system may be faulty. A diagnostic scan may be required to identify if there are any issues with the control module.
  ⑥ Environmental factors: Extreme temperatures or environmental conditions may affect the function of the sensor. Make sure the vehicle is operating within the temperature range recommended by the AdBlue system.
  ⑦ Mechanical problems: Problems with the AdBlue delivery system, such as blockages or leaks, may prevent the sensor from functioning properly. Check the AdBlue system components for any signs of damage or malfunction.
  If you have tried troubleshooting these common issues and the sensor still won’t reset, it’s best to consult a professional mechanic or technician who has experience with AdBlue systems. They can perform a more in-depth diagnosis and recommend an appropriate solution.
  
• 30.

  What happens when you unplug throttle position sensor?

  Unplugging the throttle position sensor (TPS) can have various effects on your vehicle, depending on the specific make and model and the design of the engine management system. Unplugging the TPS may cause some of the following consequences:
  ① Check Engine Light: In most modern vehicles, unplugging the TPS will trigger the Check Engine Light (CEL) on the dashboard. The Engine Control Unit (ECU) will detect the absence of the TPS signal and log a fault code related to the TPS failure.
  ② Performance degradation: The TPS provides the ECU with important input regarding valve position. Without this input, the ECU may default to a predetermined set of parameters, which can result in reduced engine performance, poor fuel economy, and possibly rough idling or stalling.
  ③ Limp Mode: In some cases, when the ECU detects a TPS fault, it may enter "limp mode" or "safe mode". This mode usually limits engine power and performance to protect the transmission system from potential damage.
  ④ Transmission shifting issues: Automatic transmissions also use TPS signals to determine shift points and smoothness. Unplugging the TPS may cause erratic or difficult shifting in vehicles equipped with automatic transmissions.
  ⑤ Idle speed control problem: The ECU uses the TPS signal to control the idle speed. Without this input, the engine may have difficulty maintaining a constant idle speed, resulting in unstable idle speed or flameout.
  ⑥ Drivability Issues: Overall, unplugging the TPS can cause a variety of drivability issues, including hesitation, turbulence, and lack of response as the ECU tries to compensate for the missing input.
  
  In summary, while unplugging the TPS may provide diagnostic information in some cases, it is generally not recommended as a troubleshooting step unless specifically instructed by a mechanic or performed during the diagnostic process. If you are experiencing issues with your TPS or suspect it may be faulty, it is best to have it diagnosed and replaced by a qualified mechanic to ensure proper engine operation and performance.