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Error code P0101 MAF sensor circuit range
Hi - do you mean the code is P0101 (rather than P1010)? The P0101 code is mass air flow sensor. In any case, given the behavior of your engine and the Check Engine scenario you describe, yes, a dirty Mass...
2500 RPM idle on cold start. Is this normal? If not, then is it due to a cold start injector?
A higher than normal idle can be due to a stuck open idle control valve or a vacuum leak in the intake when the engine is cold. You may have a bad cold start injector system. I would recommend having...
My Check Engine Light came on - 2011 Hyundai Accent
When the Check Engine Light comes on, it means the engine controller has detected a fault in one of the sensor inputs and that the fault is bad enough to affect the emissions. Most cars have additional warning lights for...
My car is overheating and constantly filling with water
Thats a good question. I will go through a few steps you can take to see where your problem is occurring. Get a UV light and dye to put in your coolant. Run your car until it...
A horrible grinding sound coming from somewhere in the gearbox/ under the hood
I would certainly check the gearbox fluid level first - this is easy to do. If the fluid is very low, damage may have already been done to the gearbox, given your advanced mileage. If you press the clutch pedal,...
Car is losing power and the temperature gauge reads high.
Hello. From what you've described, most likely, your engine has had a head gasket failure, perhaps because of a failed thermostat - which could cause the "temperature way up, then backs off" cycle you describe. A failed head gasket means...
What's wrong with my gas pedal?
Hello. This may be related to what is called a throttle position sensor. This is a small sensor inside the intake system of your car that monitors the position of your foot on the gas pedal and relays this information...
Emissions test
According to the Arizona DMV website, the emissions test will perform the following during an inspection: On-Board Diagnostic (OBD) Test: OBD tests monitor vehicle components and evaluate any system problems. Gas cap test: Makes sure the gas cap can...
I'm changing my AE92 OEM Corolla shocks to a KYB Excel-G model. Do I keep the same coil springs?
For most people replacing their springs along with the struts is an issue of budget. Since you are already upgrading the shock portion of the strut, you will also see an improvement with new springs. I definitely suggest replacing the...
Sounds as if the car is not going into gear. I have RPM reading odometer, not sure what it should be reading when driving on freeway.
Hello and thank you for contacting YourMechanic. Watch the tachometer (rpm gauge) as the vehicle is in motion. When driving, you should see the tachometer go up and then go down a little when the transmission shifts gears. For 4...
My car studders when the gas pedal is pressed.
This may be a sign of a failing throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of a vehicle. The sensor is usually located on the butterfly spindle/shaft so that it...
Speedometer stick and jumps
Hello. Your Geo utilizes a speedometer cable (rather than an electronic sensor and wiring) to communicate speed from the transmission to the speedometer cluster. Given your mileage, the cable lining has probably deteriorated and the cable should be replaced. If...
I cleaned the EGR valve but I'm not sure if it is working now
Yes, if you pressed on the diaphragm and it stalled the engine that means that exhaust gases were flowing through the EGR valve as intended. A good way to test the EGR valve in its entirety is to use a...
Car keeps overheating and losing antifreeze. Thermostat and hoses are all fine. What else could it be?
Hi. I believe your Hyundai has a blown head gasket. This failure mode may not contaminate engine oil with coolant as sometimes occurs. The lost coolant may go into the cylinder or the exhaust instead. A slightly sweet smell from...
My ABS light and occasionally my emergency brake light is coming on and my brakes occasionally make a grinding noise when coming to a stop.
Hello there, many faults will cause your ABS light and emergency brake light to be seen on your 2009 Chevy Aveo5. When the ABS light is on it indicates there is a fault in the ABS system. This fault will...
Is my clutch safety switch broken?
Hello. These 2 problems should not be related. A clutch safety switch stuck in the "pedal depressed position" (or a switch that has been unplugged and a wire connected across the 2 terminals) will allow starting without depressing the clutch....
Is it OK to drive with one cylinder at 70 psi?
Unfortunately, there is no definite way to tell how much longer your engine will last. Generally, a cylinder needs at least a minimum of 100 psi in order to run. In your case, this is not happening, which means the...
I replaced the water pump in my 97 sentra gxe. When i put it all back together, the belt would no longer move.
If you cannot see in the area, try using a flashlight and a mirror to see if there is a bolt in a spot where it should not be and causing something to bind up. If you lift the vehicle...
Keep blowing a tail light fuse.
Assuming that no wiring was damaged during the install of the aftermarket lights, (i.e., cut insulation causing a short to ground), if the fuse started blowing right after the install that means the LED assembly is drawing more current than...
Engine light flashing intermittently
This may be related to a faulty or dirty mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into...

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