Browse

Property For Sale Property For Rent

Used Cars Others

Antiques Collectibles Apparel Baby Kids Items Books， Movies And Music Electronics Free Stuff Garden Outdoor Health Beauty Home Goods Home Improvement Supplies Musical Instruments Office Supplies Others Pet Supplies Sporting Goods Ticket Toys Games Transportation

Business Crafts Design And Web Events Home Improvement Legal Lessons Personal Pets Photography Repair And Technical Support Wellness Writing， Translation， And Transcription Others

Activities & Groups Artists & Musicians Classes & Lessons Events Friendship & Networking Lost & Found Rideshare Sports Teams Volunteers Travel & Travel Partners Skills & Language Swap Other

What does 'Audi coolant pump 2 open circuit' mean?

2 Answers

McMadison

07/29/25 9:28am

Audi coolant pump 2 open circuit means there is a fault with a coolant pump that needs to be checked or replaced. Coolant pump 2 is an auxiliary water pump located not far from the main water pump, used for continuous heat dissipation after the car is turned off. Check the wiring harness and the small water pump. It is necessary to go to a 4S shop for inspection and repair. Below is additional information: Wiring harness: The wiring harness is directly connected to the engine computer via a plug without a fuse. The water pump of this car is installed under the intake pipe. The interface between the engine and transmission is located below the intake pipe. Replacing the water pump requires removing the intake pipe. Coolant: Coolant is an indispensable part of a car engine. It circulates in the engine cooling system, carrying away excess heat generated during engine operation, allowing the engine to operate at normal working temperature. When the coolant is insufficient, it will cause the engine water temperature to be too high, leading to damage to engine components. Therefore, once the owner finds that the coolant is insufficient, it should be added in time.

Was this review help?

9

1

Share

DeArthur

08/12/25 10:03am

Audi Coolant Pump 2 Open Circuit sounds quite alarming, but it essentially means there's a break or interruption in the electrical circuit of the coolant pump. This is usually caused by aging or damaged wiring, a blown fuse, or a malfunction in the pump itself. Having driven an Audi for several years, I once had the warning light suddenly come on, and after checking, I found the issue was with the pump. The coolant pump is responsible for circulating coolant to the engine for cooling. An open circuit will stop the pump, leading to engine overheating, and if not addressed promptly, it can damage components under the hood. Common causes in Audis include fuse issues or wiring damage, especially in older models. If you see the warning light, it's advisable to stop and check immediately to prevent minor issues from escalating. It's best to visit an Audi dealership or a reputable repair shop for diagnosis and part replacement. Regular maintenance, including coolant changes and wiring inspections, can help prevent such problems.

Was this review help?

3

5

Share

Expand All

More Forum Discussions

What are the symptoms of a faulty expansion valve?

Insufficient liquid supply, resulting in low refrigerant flow rate. Excessive liquid supply, causing liquid return. Fluctuating liquid supply. The following is an introduction to the expansion valve: 1. Expansion valve: It is an important component in the refrigeration system, usually installed between the liquid receiver and the evaporator. The expansion valve consists of three main parts: the valve body, the temperature sensing bulb, and the equalizer tube. 2. Temperature sensing bulb: The temperature sensing bulb is filled with refrigerant in a saturated gas-liquid equilibrium state, and this part of the refrigerant is not connected to the refrigerant in the system. 3. Equalizer tube: One end of the equalizer tube is connected to a position slightly away from the temperature sensing bulb at the evaporator outlet, and is directly connected to the valve body through a capillary tube. Its function is to transmit the actual pressure at the evaporator outlet to the valve body. 4. Quality judgment: The ideal working state of the expansion valve should be to change the opening degree in real time according to the change of the evaporator load and control the flow rate. However, in reality, due to the delay in heat transfer of the temperature sensed by the temperature sensing bulb, the response of the expansion valve is always a step behind.

What type of batteries does BYD use?

BYD vehicles utilize two types of batteries: ternary lithium batteries and lithium iron phosphate batteries. The primary difference between these two batteries lies in their cathode materials. Below are the distinctions between these battery types: 1. The cathode of lithium iron phosphate batteries is made from lithium iron phosphate, while the cathode of ternary lithium batteries is composed of ternary materials. Ternary lithium batteries boast higher energy density and are lighter in weight, making them more suitable for passenger vehicles. Consequently, most pure electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs) employ ternary lithium batteries. Before venturing into automobile manufacturing, BYD was already a battery producer and had become the world's second-largest manufacturer of rechargeable batteries. 2. BYD offers a wide range of pure electric vehicles and plug-in hybrid vehicles. Additionally, BYD-manufactured pure electric buses have been exported for international use. Plug-in hybrid vehicles differ from conventional hybrid vehicles in that the latter cannot be charged using an external power source, whereas plug-in hybrids can recharge their power batteries externally. Plug-in hybrids exhibit longer range in pure electric mode compared to conventional hybrids, and their total range often exceeds that of standard pure electric vehicles. In China, plug-in hybrid vehicles are classified as new energy vehicles and are eligible for green license plates. Many consumers have purchased plug-in hybrid vehicles encouraged by national policies.

What Parts Get Burned When Car Battery is Connected Backwards?

Consequences and countermeasures for reversing car battery terminals are as follows: 1. For vehicles with ECU-controlled systems, the ECU remains powered continuously. If terminals are reversed, these circuits will be the first to burn out, potentially damaging sensors as well. 2. There are two possible outcomes when circuits burn: either they burn open (circuit breaks) or burn short. If burned open, the damage stops there; if burned short, it will continue damaging other electrical components until a fuse blows. 3. Circuit burnout happens instantaneously - by the time smoke appears, multiple components may already be damaged with unpredictable consequences. 4. Inspection should begin with checking fuses, then battery voltage. After correct battery installation and power-on, observe dashboard displays, test electrical components (lights, horn, alarm, radio, power windows etc.), start the engine to check displays, and test AC system. Any malfunctions require repair, with ECU and sensors being most vulnerable. 5. Battery disconnection causes data loss requiring 4S dealership initialization, commonly called decoding or code matching.

What documents are required for vehicle registration?

New vehicle registration requires the following documents: 1. Original and photocopy of the identity proof of the vehicle owner. For corporate vehicles, the original and a photocopy of the "Enterprise Code Certificate" with the company seal, a "Power of Attorney" with the company seal, and the original and photocopy of the trustee's identity proof are required. For personal vehicles, the original and photocopy of the owner's "Resident Identity Card" are required. 2. Original certificate of compliance for the whole vehicle's factory production or original import certificate for imported vehicles. (For non-exempt models, a safety technical inspection certificate is also required.) 3. Original proof of vehicle origin, including the purchase invoice. 4. Original third copy of the compulsory traffic accident liability insurance certificate. If the original is lost, any other copy with the insurance company's seal is acceptable. 5. Original vehicle purchase tax payment certificate or tax exemption certificate. 6. If an agent is handling the registration, the original and photocopy of the agent's identity proof must also be presented. 7. For vehicles such as fire trucks, ambulances, and engineering rescue vehicles, a proof of vehicle usage nature issued by the relevant authority is required. 8. Other original or photocopied certificates and documents required by laws and administrative regulations during vehicle registration.

What does rear mean in a car?

The rear button on a car typically appears in the air conditioning system and serves as the rear windshield defogger button. Nowadays, many car models omit the English word "rear" and simply use an icon instead. Below are some relevant details: 1. On the rear windshield of a car, you will notice thin copper wires, which are heating elements. Pressing the rear button activates these heating wires to defog the rear windshield. 2. Usually, the rear windshield defogger switch automatically turns off after about ten minutes to protect the heating elements. 3. Most cars currently on the market are equipped with a rear windshield heating function. While the button location may vary, the functionality remains the same. After turning on the rear windshield heating switch, the fog on the rear windshield typically disappears within about a minute.

What Happens If a Car Lacks Coolant?

If a car lacks coolant, the coolant warning light on the dashboard will illuminate. Coolant Replacement Method: Before completely replacing the coolant, conduct a thorough inspection to check for any signs of leakage or cracks in the pipes, with a particular focus on the five-way hose. The five-way hose is named for its five connecting interfaces to various parts. Coolant flows through the five-way hose and is distributed to different parts of the car to function. If there is any coolant leakage in this section, replace the hose or re-secure the interface as needed. Drain the old coolant, then flush the liquid channels with clean water. Add clean water to the coolant reservoir, then continue adding water to the reservoir so that water continuously flows through the engine cooling system. Start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water draining from the reservoir may have a faint pink tint. Continue adding clean water until the drained water runs clear. Note: Don’t forget to remove the heater hose and drain the water from the heater core. After draining for about an hour, add the new coolant through the radiator hose—this allows the coolant to flow quickly into the radiator. Then, add another bottle of coolant to the reservoir until it is nearly full. Start the engine and let it run for about 10 minutes. During this time, the coolant level will drop slightly as air is purged from the cooling system. Top up the coolant to the "MAXT" mark on the reservoir.

Trending Ranking

Can car keys be reissued?

What to Do When Your Car Gets Rear-Ended?

How to Display Fuel Consumption?

What to Do After a Rear-End Collision?

How to Dispose of Old Tires After Replacement?

How to Exit Parallel Parking Without Hitting the Corner or Crossing the Line?

What is the general procedure for handling a car accident?

How to Operate a Column-Shift Vehicle?

Is Cruise Control Necessary for Cars?

How to deal with speeding less than 10% in highway section speed measurement?

More Forum Discussions

What Air Setting to Use for Defogging Car Windows?

How to Quickly Remove Cigarette Smell from the Car Interior?

What is the load capacity of the Teana?

What is the equivalent displacement of a 1.6T engine?

Help

Cookie

Cookie Settings

© 2025 Servanan International Pte. Ltd.