What to Do When Your Car Battery Dies?

2 Answers
PresleyLee
07/24/25 4:23am
Here are the solutions for a dead car battery: 1. In emergency situations, the most reliable method is to promptly contact a rescue vehicle. To prevent being unable to charge when the battery is dead, car owners should prepare a set of jumper cables in the car. The main purpose of the jumper cables is to connect with the rescue vehicle. After connecting the jumper cables, start the rescue vehicle's engine and increase its RPM to charge the dead car. 2. Another option is to use a jump start. For this method, you first need to borrow someone else's car with a fully charged battery. Open the hoods of both cars, connect the positive and negative terminals of your battery to the corresponding terminals of the other car. Then, have the other person start their car before you attempt to start yours. In most cases, this should get your car started. Before connecting the jumper cables to the donor car, make sure to turn off its engine. After your car starts normally, remove the jumper cables by disconnecting the negative terminal first, followed by the positive terminal. It is recommended that car owners prepare an external charger.
Was this review help?
1
2
Share
DelPaisley
08/10/25 11:57pm
Once when I went on an outing, my car wouldn't start after stalling—it turned out the battery was dead. With no one around at the time, luckily I had jumper cables and found a passing car to help jump-start it. When connecting the cables, always match positive to positive and negative to negative—never mix them up, or sparks will fly dangerously. After starting, drive for a while to recharge, preferably over half an hour. Since then, I always keep a portable jump starter handy—compact and practical, just press a button for emergency help. Dead batteries often happen in winter or after long periods of inactivity, so it's wise to check the voltage regularly; if it's below 12 volts, it's time for maintenance or replacement. Don't neglect upkeep, or you might end up stranded and delayed.
Was this review help?
2
4
Share
Expand All
More Forum Discussions

Should the engine oil be changed when the car is hot or cold?

You can change the engine oil whether the car is hot or cold, but relatively speaking, it is better to change the oil when the car is hot. After the car is hot, the viscosity of the oil becomes thinner, and the fluidity improves. Impurities and sludge will be discharged well with the waste oil and will not adhere to the inner surface and bottom of the engine casing. Relevant information about engine oil is as follows: 1. Introduction: Engine oil, also known as engine lubricant (English name: Engine-oil), has a density of about 0.91×10³ (kg/m³). It can lubricate and reduce wear, assist in cooling, seal and prevent leaks, prevent rust and corrosion, and provide shock absorption for the engine. It is known as the 'blood' of the car. 2. Composition: Engine oil consists of two parts: base oil and additives. The base oil is the main component of the lubricant, determining its basic properties. Additives can compensate for and improve the shortcomings of the base oil, giving it certain new properties, and are an important part of the lubricant.
2
2
Share

What should be noted after changing the engine oil?

When changing the engine oil, there are mainly the following points to note: 1. Add oil in moderation: The oil should not be insufficient, but neither should it be excessive; adding too much oil will increase engine resistance and reduce the vehicle's service life; adding too little oil will cause lubrication pressure, leading to low-load operation of the engine, which can also cause significant wear. 2. Choose oil according to the vehicle manual: When purchasing oil, it is essential to buy the oil grade and viscosity as specified in the vehicle manual. Special attention should be paid to the fact that engine oil and diesel oil are not interchangeable. Unless specifically stated, mixing the two can cause significant wear to the vehicle.
3
2
Share

What does fault code P0420 mean?

Fault code P0420 indicates that the catalytic converter system efficiency is below the threshold. Possible causes include the use of leaded gasoline damaging the converter, issues with the oxygen sensor, exhaust pipe damage, or catalytic converter leaks. Related information is as follows: 1. Meaning of P0420: To resolve this fault, it's essential to understand that P0420 (Catalyst System Efficiency Below Threshold Bank 1) means the ECU monitors the efficiency using sensors installed before and after the three-way catalytic converter (TWC). 2. Introduction to Catalysts: The effect caused by catalysts in chemical reactions is called catalytic action, and catalysts are also known as promoters in industry. The composition, chemical properties, and mass of the catalyst remain unchanged before and after the reaction; its relationship with the reaction system is like that between a lock and a key, exhibiting high selectivity (or specificity).
11
3
Share

What causes the ABS light to illuminate in a Volkswagen Polo?

ABS light illumination can occur in various states, with different causes and solutions for each state, as detailed below: State 1: ABS warning light remains constantly illuminated (most common). Cause 1: The ABS wheel speed sensor's sensing area is covered by dirt, mud, or other contaminants, affecting the sensor's ability to detect the corresponding speed signal. This prevents the ABS control unit from determining the vehicle speed or wheel slip rate, thus failing to issue appropriate commands to regulate braking. Solution: Clean the dirt from the wheel speed sensor and adjust the gap between the sensor and the signal ring to restore normal function. Cause 2: Poor signal transmission due to loose system wiring connections or faulty ABS relay contacts, leading to system malfunction. Solution: Inspect wiring connections and re-secure any loose connections. State 2: ABS warning light intermittently illuminates but turns off during acceleration. Cause: When multiple electrical components are in use, the battery voltage drops below 10.5V. As engine speed increases, voltage rises, and the ABS light turns off. This may also occur due to insufficient power supply voltage to the ABS system, such as poor terminal contact or grounding issues. Solution: Check battery specific gravity; inspect the charging system; examine the power supply (e.g., voltage relay or poor power contact). State 3: ABS warning light remains illuminated after engine start and only turns off when the engine is turned off (IGFF). Cause: Poor grounding connection of the ABS hydraulic valve body; loose wiring connections at the ABS hydraulic valve body; ABS control unit malfunction. Solution: Loosen and then re-tighten the grounding screw of the hydraulic valve body, cleaning the contact surface if necessary; check for enlarged connector gaps; replace the ABS or ABS/ASR control unit. State 4: ABS warning light illuminates during high-speed driving. Cause: During high-speed driving, the ABS control unit detects a significant discrepancy between rear and front wheel speed signals; incorrect tire or wheel rim specifications. Solution: Refer to the vehicle's specified tire and wheel rim dimensions, as indicated on the fuel cap label. State 5: ABS warning light intermittently illuminates. Cause: Improper adjustment of the brake light switch; internal poor contact in the brake light. Solution: With the engine running, press the brake pedal and manually push the brake switch linkage fully downward, then release the pedal to complete self-positioning; replace the brake light switch if necessary. If the ABS warning light is illuminated, it is advisable not to continue driving, as this indicates a malfunction in the anti-lock braking system. During emergency braking, locked wheels may cause the vehicle to skid uncontrollably, preventing the driver from slowing down or adjusting the vehicle's trajectory, posing significant safety risks.
6
0
Share

What is the reason for the clunking sound when shifting gears in a Volvo XC60?

Here are the possible reasons for the clunking sound when shifting gears in a Volvo XC60: 1. Shifting before the vehicle comes to a complete stop: It may be caused by shifting gears before the vehicle is fully stopped. When parking, the vehicle should be brought to a complete stop before shifting the gear lever from D (Drive) to P (Park). If the vehicle is not fully stopped when shifting to P, the P-lock hook inside the transmission may strike the gear, producing a clunking sound. Alternatively, it could be due to a malfunction in the shift mechanism or worn transmission gears. Over time, gaps may form between the gear teeth, leading to noise during gear shifts. 2. Insufficient lubrication of transmission gears: Additionally, because the engine's power is directly transmitted to the transmission after shifting, insufficient lubrication of the transmission gears during cold starts may also cause noise. Therefore, it is advisable to let the vehicle warm up before shifting and driving after a cold start. This practice helps protect both the transmission and the engine.
14
2
Share

Where is the Volkswagen Sagitar produced?

Volkswagen Sagitar is produced at the FAW-Volkswagen Chengdu plant. Below are the relevant details: 1. Positioning: The Sagitar is a joint-venture A+ class sedan brand under FAW-Volkswagen. It was introduced to the Chinese market on April 9, 2006, and is the successor to the fifth-generation Volkswagen Jetta, positioned as a "German high-performance sedan". 2. Powertrain: The 1.6L Sagitar model is equipped with the EA111 series engine, with a maximum output power increased to 105 horsepower (77kw) and a peak torque of 155N·m. It is paired with either a 5-speed manual or 6-speed automatic transmission. The power performance has been improved compared to the previous 1.6L Sagitar. The 1.4TSI and 1.8TSI engines remain the same as the current models, with the 1.8TSI model featuring a 7-speed DSG dual-clutch transmission replacing the previous 6AT transmission.
19
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.