How to Solve Cruze Fault Code 84?

1 Answers
HeidiAnn
07/29/25 4:34pm
Cruze with fault code 84 indicates insufficient power in the vehicle, and it is recommended to go to a 4S store for repair. Generally, with this fault code, there are mostly problems with components such as the throttle and crankshaft position sensor. After replacing these two parts, the fault code will automatically turn off. The engine fault light may illuminate for the following reasons: 1. Poor gasoline quality, leading to incomplete combustion of the air-fuel mixture during engine operation, causing the engine fault light to illuminate. This does not affect driving safety but can harm the engine. 2. A damaged oxygen sensor or a damaged, loose sensor connector can cause the mixture to be too lean or too rich, thereby triggering the fault light.
Was this review help?
6
3
Share
More Forum Discussions

How to Use Turn Signals When Entering a Roundabout

There are three scenarios for using turn signals when entering a roundabout: turning left upon entering, going straight upon entering, and turning right after entering. The details are as follows: Turning left upon entering: If the vehicle intends to turn left, it should prioritize selecting the left lane inside the roundabout. Since the vehicle needs to merge from the outer lane to the inner lane, it should activate the left turn signal when entering the roundabout. Before exiting the roundabout, the driver should switch to the right turn signal in advance to give sufficient warning to vehicles behind. After ensuring safety, the vehicle should start changing lanes from the inner lane to the outer lane and finally exit the roundabout. Going straight upon entering: If the vehicle intends to go straight, it should prioritize selecting the middle lane inside the roundabout and merge into the middle lane without obstructing vehicles behind. Since no lane change is required after entering the roundabout, the left turn signal is unnecessary. When preparing to exit the roundabout to continue straight, the vehicle may need to cross the right lane inside the roundabout, potentially hindering vehicles behind. Therefore, the right turn signal should be activated to alert other vehicles before exiting the roundabout. Turning right after entering: If the vehicle intends to turn right to another intersection, it should quickly select the right lane inside the roundabout to exit or may choose to turn right from the outer lane. The situation when entering the roundabout is similar to going straight, so the left turn signal is also unnecessary. After selecting the corresponding intersection, the driver should activate the right turn signal in advance and exit the roundabout by turning right after ensuring safety. Typically, roundabouts are designed with four lanes: the left lane for left turns, the middle two lanes for going straight, and the right lane for turning right to exit the roundabout.
5
2
Share

What Causes Rapid Consumption of Antifreeze?

Rapid antifreeze consumption is generally caused by the following three reasons: 1. Radiator damage: Poor sealing of the upper and lower water chambers leads to antifreeze leakage. 2. Overflow tank: Loose connections at the water pump interface and cooling system pipe joints result in poor sealing and antifreeze leakage. 3. Cylinder head gasket damage: Excessive flatness deviation, warping of the cylinder head and block mating surfaces, or loose cylinder head fastening bolts allow high-temperature, high-pressure gases from the cylinders to enter the cooling system, causing rapid coolant consumption. Additional information about antifreeze: The full name of antifreeze should be antifreeze coolant, meaning it is a coolant with antifreeze properties. Antifreeze prevents the coolant from freezing and cracking the radiator or damaging the engine cylinder block or head when the vehicle is parked in cold winter conditions. Many people think antifreeze is only used in winter, but in fact, it should be used year-round.
12
3
Share

How to Set Automatic Mirror Tilt When Reversing?

To set the automatic mirror tilt when reversing, first engage reverse gear, then press and hold the driver's seat memory button on the left side until you hear a sound, indicating successful memory. Configurations with seat memory have this function. When reversing, rotate the mirror adjustment to the R position, and it will automatically tilt down. Below are the detailed steps for setting the automatic mirror tilt when reversing: 1. Power on the car but do not start it (press the start button without stepping on the brake); 2. Set your memory seat positions 1, 2, and 3, and select your seat position; 3. Choose the side mirror you want to set by pressing the mirror adjustment selection button (left or right); 4. Step on the brake, shift to R gear, and the selected mirror will automatically tilt down to the factory preset position. Use the 4-way adjustment button to set it to your desired position; 5. Press and hold the seat memory button (1, 2, or 3) for about 2 seconds, depending on which memory position you selected; 6. Step on the brake, shift to P gear, and press the mirror adjustment selection button once more to complete the setup.
10
4
Share

What to Pay Attention to When Changing Engine Oil and Oil Filter

Here are the precautions for changing the oil filter: 1. After the engine has been running, the exhaust pipe will also be very hot, so be careful when working around the exhaust pipe. Be cautious when loosening the oil drain bolt while the engine is hot, as the oil temperature is high to avoid burns. 2. Properly dispose of waste oil and old filters. Waste oil, which is highly toxic, must never be disposed of with household waste, and draining it into the sewer is also illegal. 3. Oil filters come in various types, but only high-quality filters can ensure maintenance quality, so premium genuine oil filters must be used. Using oil filters that do not meet specifications can cause engine oil leaks and contamination. A special reminder: before installing a new oil filter, the rubber gasket on the cylinder block must be replaced.
16
2
Share

What is a Retarder?

The automotive retarder refers to a device that, when activated during deceleration or long downhill driving, allows the vehicle to slow down smoothly, avoiding the wear and heat generated by frequent use of the brakes. Below is a detailed introduction to the retarder: 1. Based on different working principles, automotive retarders can be classified into several typical structural forms, including engine retarders, hydraulic retarders, electric turbo retarders, motor retarders, and aerodynamic retarders. 2. Depending on the form of braking torque application, automotive retarders can be divided into primary retarders (those acting on the front end of the transmission) and secondary retarders (those acting on the rear end of the transmission). 3. When a vehicle is descending a long slope, using exhaust braking can achieve good braking effects. However, for heavy-duty mining dump trucks, the effectiveness of exhaust braking is limited, and it can cause some degree of damage to the engine. Therefore, mining dump trucks equipped with hydraulic-mechanical transmissions are also fitted with hydraulic retarders.
11
2
Share

Is it necessary to clean the inside of a car engine during maintenance?

Regardless of the brand of the car or the type of engine, cleaning is essential. Here are the specific explanations: 1. The fuel system primarily involves mixing gasoline with air to form a combustible mixture. Gasoline inherently contains impurities, and air carries dust. When gasoline burns under high temperature and pressure and oxidizes with the atmosphere, carbon deposits form. If these deposits are not cleaned in time, they can cause various issues, such as: difficulty starting a cold engine, engine shaking, lack of engine power, increased fuel consumption, excessive exhaust emissions, and other adverse phenomena. 2. Due to factors like high temperature, oxidation, and oil quality, engine oil gradually loses its performance, providing less and less protection to the engine (this is the fundamental reason for regular oil changes). When the oil fails to protect the engine effectively, wear, carbon deposits, and acid corrosion can cause fatal damage to the engine. 3. If carbon deposits in the lubrication system are not cleaned promptly, they can lead to various faults, such as: clogging the engine's oil passages, causing dry friction in the engine, contaminating new oil, reducing the performance of new oil, corroding metals, decreasing the engine's sealing performance, lowering cylinder pressure, and increasing engine wear and other faults.
11
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.