Will the engine malfunction light illuminate if the oxygen sensor is faulty?

1 Answers
ElijahRose
07/25/25 11:02am
Yes, the engine malfunction light will illuminate if the oxygen sensor is faulty. The oxygen sensor is one of the critical sensors in the engine control system. A malfunctioning oxygen sensor can affect the normal operation of the engine, and once it fails, the engine malfunction light will turn on. It is recommended to promptly inspect and repair the oxygen sensor. The oxygen sensor is used to detect the oxygen concentration in the exhaust and sends feedback signals to the ECU. The ECU then adjusts the fuel injection amount from the injectors to maintain the air-fuel ratio of the mixture near the theoretical value. If the oxygen sensor fails, the computer of the electronic fuel injection system cannot obtain information about the oxygen concentration in the exhaust pipe, thus failing to perform feedback control on the air-fuel ratio. This can lead to increased engine exhaust pollution, unstable idling, misfires, and surging issues. Therefore, it is essential to address the malfunction or replace the oxygen sensor promptly.
Was this review help?
18
5
Share
More Forum Discussions

Should you turn right before or after the bridge in the Subject 4 exam?

In the Subject 4 exam, you should turn right after the bridge. Below is relevant information about Subject 4: 1. Exam content: Subject 4 mainly includes requirements for safe and civilized driving operations, safe driving knowledge under adverse weather and complex road conditions, emergency handling methods for situations like tire blowouts, and knowledge on dealing with traffic accidents. 2. Retake instructions: If you fail Subject 4, you do not need to retake the previously passed exams (Subject 1, Subject 2, Subject 3). You can schedule a retake on your own, and no retake fee is required. There are no scheduling restrictions for the safe and civilized driving theory exam, but the validity period of the driving skills test permit is three years. If the applicant does not complete the exam within the validity period, the results of the passed subjects will be invalidated.
8
4
Share

Will the water in a four-wheeled vehicle's radiator freeze at minus 3 degrees Celsius?

Four-wheeled vehicle radiator water will freeze and get damaged at minus 3 degrees Celsius without antifreeze. Functions of automotive antifreeze: Provides anti-corrosion protection for cooling system components; prevents scale formation to avoid reducing radiator efficiency; ensures the engine operates within normal temperature ranges. Precautions for using antifreeze: Antifreeze level should be checked regularly and replenished promptly if below the minimum mark; observe for any turbidity or sediment in the antifreeze, replace immediately if contaminants are present; different vehicle models use different colored antifreeze which should not be mixed; before winter, measure the antifreeze's freezing point to prevent freezing.
5
0
Share

What are the reasons why Ford car doors cannot be locked?

The reasons why car doors cannot be locked are as follows: 1. Circuit malfunction: If you are using a remote key to lock the door, it is very likely that the remote lock is malfunctioning or factors such as the aging of the car's remote transmitter antenna are causing the remote key to be ineffective. In this case, you can use the spare mechanical key to lock the door. 2. Wireless signal interference: If there is strong magnetic field signal interference around the car, the smart key, which uses low-intensity radio waves, may not function properly under such interference. 3. Human factors: If the car frequently fails to lock remotely in a certain place, you need to be wary of door jammers, as some criminals use a radio signal jammer that can emit electromagnetic waves at the same frequency as the car lock signal, thereby blocking the electronic code of the car's central lock and temporarily disabling it.
10
5
Share

What is the displacement of the BYD F3?

1.5L. The top model is 1.8L. Below is relevant information about the BYD F3: Interior: The overall interior design is simple and elegant, with a fresh light color scheme. The configuration is comprehensive and abundant. High-end models' leather seats and reverse radar have received positive feedback from users. The air conditioning performs well, but the craftsmanship and materials are average, with noticeable gaps in some areas. The 2010 models had some reductions in configuration, and some users reported issues with dashboard noise. Handling: The overall handling is subpar. The steering wheel has moderate weight, but some users have reported slight deviation issues. The throttle response is sensitive, but the chassis is light, and the suspension is stiff, leading to significant bumps when driving over speed bumps or uneven roads.
19
4
Share

Why Is Getting a Driver's License Becoming Increasingly Difficult?

There was a golden period for learning to drive, with specific circumstances as follows: 1. Essence: The increasing number of vehicles, high volume, and frequent accidents are among the fundamental reasons for stricter driving test regulations. 2. High Standards: Rigorous assessments ensure safety from the source and reduce various traffic accidents. The thought of having numerous 'road killers' on the streets is a terrifying scenario. Additional Information: From this perspective, the difficulty of the test is a positive thing. If a traffic accident occurs due to poor driving skills, regretting not having practiced enough would be meaningless. The golden period mostly rewards the first batch of pioneers. In the future, it is inevitable that everyone will have a driver's license, and every household will own several cars. Looking at developed countries in Europe and America, it's clear that driver's licenses have almost replaced ID cards. Learning to drive now is like learning to use computers in the past—it may seem unnecessary at the time but will become indispensable in the future.
16
1
Share

Why is there an area in the middle of the windshield wiper that cannot be wiped?

If the new wiper cannot wipe a section in the middle, it may be due to an oil film on the windshield. If it is a beamless wiper, it could be because the pressure from the wiper arm is insufficient, preventing the wiper from fully extending. It is recommended to replace the spring strip on the wiper arm or switch to a three-section wiper. A wiper is a blade structure installed in front of the windshield, composed of a motor, reducer, four-bar linkage, wiper arm spindle, and wiper blade assembly. Its main function is to clear rain, snow, and dust from the windshield that obstructs visibility. Reason: The wiper arm contains a spring, and the wiper relies on the spring to provide downward pressure to clean the windshield effectively during its movement. If the wiper pressure is too low, it will result in incomplete cleaning. This type of spring-loaded wiper cannot adjust the downward pressure; it can only be resolved by adjusting the angle of the wiper. Wiper angle: If the wiper angle is incorrect, you can loosen the screw at the base of the wiper arm, adjust it to the correct position, tighten the screw, and cover the dust cap. If the angle of the wiper head is incorrect, the wiper blade may not fit properly against the windshield, leading to incomplete cleaning or areas that are not wiped. In such cases, lift the wiper, remove the wiper blade, and use a wrench to adjust the angle of the wiper head until it fits snugly against the glass. The method for replacing a car wiper is as follows: lift the wiper; press the clip below to remove the wiper blade; take off the wiper; pry up the front end of the middle clip; insert the wiper into the middle clip, pull it tight by hand, and once you hear a click, the replacement is complete.
1
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.