Check engine light on, engine knocking, loss of power, and coolant leaking.

Hi,

My car recently had its engine replaced because oil had leaked out. Everything had been running smoothly for about three weeks now.

Today, after parking my car, the check engine light came on. I stopped the car. The oil was full, but the coolant was empty. Not having coolant, I drove the car for less than a mile when I remembered a friend of mine left spare coolant in my car. I put this in but noticed that the temperature gauge had already gone to the halfway point.

I drove the car 4 miles to a mandatory meeting and parked. Afterwards, I drove uphill 3 miles. I started to hear a quiet

Experienced mechanics share their insights in answering this question :
Hi there. Grab a flashlight and look under the vehicle for where the coolant leak is coming from. Either there is a gasket, hose, or freeze plug that is leaking causing the coolant to leak or the engine has cracked. The knocking noise is from the engine getting too hot and causing a detonation sound. If there is a crack in the block, then it could be from a piston rod that broke off. The loss of power is when the engine had not enough coolant to operate properly and caused the engine to overheat and not burn the fuel properly. If you need further assistance with your engine having a coolant leak, then seek out a professional, such as one from Your Mechanic, to help you.

How to Identify and Fix Common car Problems ?

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Some car owners have also reported noticing the `Check Engine` light displaying on the dashboard before identifying a coolant leak. A `check engine` light on a dashboard. This is because, when the coolant level is too low it affects the temperature level in the engine.
Low coolant can sometimes cause a head gasket on your engine block to blow. If this happens, you may notice smoke emitting from the engine or tailpipe, a loss of power, engine knocking sounds, or decreased efficiency.
If the coolant level is dropping and there is no external leak evident, then the coolant is probably leaking internally, into the engine. If the car has recently overheated then this could have caused the head gasket to fail.
The battery and Check Engine Lights coming on may indicate that leaking coolant may have sprayed onto other components like the alternator or possible the serpentine belt which drives the water pump, alternator and air conditioning compressor may have broken off, or may be slipping due to coolant leaking all over it.
Although a small coolant leak doesn`t seem like a pretty serious issue, it can lead to complete engine failure and irreparable damage. The coolant system is one of the most important parts of any car because it keeps the engine temperature in check by cooling the antifreeze/water mix that runs through the engine block.
Antifreeze (aka coolant) is pumped through your vehicle`s engine as you drive, absorbing excess heat and exchanging it with the outside air. That means an antifreeze leak could cause the engine to overheat — and that can lead to major engine damage.
If the smooth rumble you`re used to coming from your engine is replaced with a repetitive tapping or pinging sound that becomes louder and faster as you accelerate, that`s a classic sign of engine knock.
Knocking occurs when fuel burns unevenly in your engine`s cylinders. When cylinders have the correct balance of air and fuel, fuel will burn in small, regulated pockets instead of all at once. (Think sparklers, not fireworks.)
Coolant Leaks

Oftentimes when the thermostat fails, it remains in its closed position. As the engine overheats, coolant will overflow out of the thermostat housing. This means that coolant leaking out of your engine could be a sign that your thermostat has gone bad.

Look for signs of coolant leakage—a light-colored residue or stain—around the radiator cap, on hoses throughout the engine compartment (check the ends where they are clamped to other components) and on the radiator itself. If it looks like a hose is leaking near a clamp, try tightening the clamp with a screwdriver.
Check Engine Light – A water pump itself will not cause the check engine light to come on. The reason that your check engine light comes on is that the water pump affects your engine. Without your water pump, your check engine light will come on because your engine will slowly overheat.
Left unattended, an oil leak can mean serious problems for your engine. Even a small oil leak can trigger the check engine light.
If you suspect an internal coolant leak, allow the radiator to cool, take off the cap, and look for signs of oil or frothy bubbles in the radiator or header tank. With the engine running, smell the coolant itself – if there is a whiff of exhaust gas , the cylinder-head gasket may be leaking.
The average cost to fix a leaking radiator is $340, with a range between $125 and $600. Your total cost will depend on a number of factors, such as the type of repair needed, the type of radiator you have and the materials required.
If you suspect an internal coolant leak, allow the radiator to cool, take off the cap, and look for signs of oil or frothy bubbles in the radiator or header tank. With the engine running, smell the coolant itself – if there is a whiff of exhaust gas , the cylinder-head gasket may be leaking.
It may set a misfire code if its bad enough. The coolant light may also illuminate if your coolant gets too low.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Check engine light on, engine knocking, loss of power, and coolant leaking.
ANSWER : Hi there. Grab a flashlight and look under the vehicle for where the coolant leak is coming from. Either there is a gasket, hose, or freeze plug that is leaking causing the coolant to leak or the engine has cracked. The knocking noise is from the engine getting too hot and causing a detonation sound. If there is a crack in the block, then it could be from a piston rod that broke off. The loss of power is when the engine had not enough coolant to operate properly and caused the engine to overheat and not burn the fuel properly. If you need further assistance with your engine having a coolant leak, then seek out a professional, such as one from Your Mechanic, to help you.

2012 equinox reduced power light engine light and traction light came on. Lost a lot of power got home and all light except engine
ANSWER : Your car has what is called a "safe mode" that will be engaged by the computer when it detects that something critical has gone wrong related to any of the major components in your engine chassis or power train. This may be related to a number of things, most of which should have been registered in the computer when the check engine light came on. I recommend having an expert from YourMechanic come to your location to inspect your check engine light and diagnose any codes registered by your vehicle’s computer.

Reduce engine power / check engine light is on
ANSWER : Hi there. Most of the time, reduced engine power is caused by a restriction of fuel, or the throttle body’s inability to efficiently mix air and fuel. This could be caused by a failing mass air flow sensor, EGR valve or other fuel system components. Since the check engine light is on, you should have a professional mechanic complete an inspection at your location to determine what codes are stored and which components require repair. This should resolve your issue.

Traction light/reduced engine power and check engine light coming on
ANSWER : Hello. From what you describe, it would appear that your vehicle may be experiencing some sort of intermittent wiring or sensor issue. If the problem occurred again after driving over a bump, then it may be possible that a damaged or loose wire is shorting or having contact issues. A common issue that can cause stalling is a faulty crank position sensor or wiring. I would carefully examine the engine for any loose or damaged wires. If the Check Engine Light comes back on, I would recommend having the trouble codes scanned before resetting the computer.

Check engine light refuses to go off after engine replaced
ANSWER : Hello there, you have a long series of issues going on with your 2013 Hyundai Sonata. If you keep getting a repeating oil light on than there is likely a fault in that system.

Since this fault has lasted after the engine was replaced it could be a oil pressure sensor, wiring harness fault, ECU fault, oil pump, oil strainer clogged, or low oil pressure.

To diagnose this issue properly you need a complete vehicle inspection to start from square one and identify the root cause of all this.

While driving on freeway truck goes into a limp mode, and the check engine light, abs light, parking break light, service brake
ANSWER : It is possible that you could be having an issue with your powertrain control module. This is somewhat of a common problem on many GM vehicles. I would recommend having your vehicle inspected by the dealership to determine if the powertrain control module is functioning properly. If not, a reflash of the powertrain control module may resolve the issue but often times it must be replaced.

My engine coolant light is coming on and after hitting a pot hole my thermostat light pops on, and after a few miles car run hot
ANSWER : Hi there. It is quite possible that you may have damaged the radiator when hitting the pot hole. Although there are protective shields located under the radiator itself, they are typically very thin and made of plastic in most cases. Sometimes the quick impact can cause cracking along the base of the radiator. When this happens, coolant will leak rather quickly. I would recommend two things, first, stop driving the vehicle until this issue is repaired. Second, contact a professional mobile mechanic to complete a coolant leak inspection so they can pinpoint precisely what is causing the leak and what repairs will be needed. This will allow you to have an accurate estimate for repairs.

Car started to slow down and then the check engine light, battery, and engine oil light came on. What could cause this?
ANSWER : Hi there. It is possible that the battery cable came loose or the wires to the oil pressure sensor has came loose or failed. Check the battery cables and make sure that the terminals are tight and clean. Check the wires to the oil pressure sensor and make sure that they are connected and not broken. If everything looks good, then the oil pressure sensor may have failed. Plus, check the computer for codes and see what is stored. This will lead you to the part that could have failed. I recommend replacing the oil pressure sensor then checking to see if the lights will go out. If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from Your Mechanic, that can assist you with the warning lights that came on.