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The engine light is on and the code is P0420 - Catalyst System Efficiency Below Threshold Bank . What part do I need to fix it?
While a number of things like a faulty oxygen sensor or exhaust leak can cause fault code P0420 to be set, the most common fault is the catalytic converter itself. However, as a replacement can be very expensive, your best...
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dash and console lights out - 2005 Chevy Cobalt
Try to adjust the dashboard light's rheostat to see if it is turned all the way dim in such a way that you cannot see the lights. If the rheostat is turned up and it the lights are still not...
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How many map sensors are in my 2011 Sonata 2.0t?
Hello. There is only one MAP sensor on your vehicle. If you replaced it and the code has not gone away, or you are still experiencing the same symptoms, there is likely something else going on with the circuit. Make...
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Transmission fluid leak in 2008 Infiniti QX56
Hello. The only hoses that carry transmission fluid on your vehicle are the transmission cooler lines. If there is fluid spraying from them, then there must be a hole in the line. The correct way to repair this is to...
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Helicopter noise, steering wheel vibration. Had CV axles and wheel bearing replaced, but the noise is still there. What's wrong?
Hello, thanks for writing in. This sounds like you have tires that are not wearing correctly due to the alignment is not correct or has not had rotations and the tires have high ridges on the tread. Have the tires...
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Headlights stay on
Hello. This sounds like the headlight switch is faulty. You might also want to check to make sure you have the headlight switch in either the auto position, or the off position. If the headlight switch is left in the...
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Antifreeze leaking out of radiator
Your car most likely overheated because there was no coolant in the engine. The leak in your radiator will need to be fixed, and then your car should operate normally again. I would ask for help from one of the...
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no power to accessories
Hello. Thanks for writing in. The commonality between all of these systems is that they run through your door hinge. Due to this they also share common fuses and conduit. Start by looking into the fuse and fuse box. If...
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Check Engine Light with P0174 code
As you know, this code relates to a lean fuel condition which can be caused by many different things, some of which you have already addressed. The oxygen sensors, which are part of your emissions system, read exhaust gases to...
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My engine will not start. It will only make a clicking noise. 1999 Chevrolet Tahoe
Hello. If you are getting a clicking noise when trying to start the vehicle most of the time it is either the battery or starter. I usually start by load testing the battery. If the battery does not pass then...
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Idles issue after warm up.
The idle control valve is the most likely cause and is the most common of problems with the vehicle for a low idle problem. You may also need to clean the throttle body and its passages with the idle control...
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I am about to replace engine in my 1998 lincoln nav it had 240 thousand miles i have an engine trying to find a good e to have it
To remove and replace the complete engine, the labor time is in the range of 14 to 18 hours . The variance is due to different requirements in the 4WD version versus the RWD version and there are at least...
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Back power window not working
Hello. If you have one window that stopped working it is typically caused by a window motor or regulator. These typically need to be replaced together. I typically remove the door panel and check to see if there is power...
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When I put the automatic gear in reverse it moves forward. It is Toyota Sienna LE 2004.
Hi there. The transmission reverse input clutch is slipping. Check the fluid to the transmission and smell it. If the oil smells like its burnt, then the transmission would need to be rebuilt or replaced. I recommend dropping the oil...
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I have a 2005 Ford Mustang and it won't go past 20 miles per hr. There are no lights on sayings what should be checked and no nois
Hi there. Usually when the vehicle will not accelerate past 20 mph it is due to the ECU creating an error code that activates the "limp mode". This safety system is designed to reduce vehicle speed when an error is...
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07 Honda Accord 2.4L - how hard is it to change out the motor mounts?
Engine mounts can be replaced within an hour or so for a somewhat experienced person who has a jack on the proper tools. I would recommend having your vehicle inspected by a qualified professional before replacing any parts to confirm...
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Why doesn't my transmission shift properly after changing my throttle body and valve assembly on 2000 Nissan Maxima?
Hi there. In some rare instances, if you completed the replacement of the throttle body without removing the battery cables, the ECU will trigger an error code that can disable some electrical systems; including the shift solenoid of the transmission....
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Engine knocking noise in 2011 Dodge Charger
The variable valve timing system uses oil pressure and solenoid control. If the system is not working properly or the oil supply is restricted to this system a knocking noise can occur which can get louder on acceleration and if...
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does driving a car at 4000RPM with a limit of 8000 rpm cause harm, after the car is at operating tempurature?
It should not harm your engine to run it at 4000 rpm. With this high of miles, however, I would not run it for an extended time at these speeds. Especially since it's an older engine.
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Blowing cold air no heat
Since the thermostat has been replaced, there are a couple of other things to look at. The heater hoses going through the firewall in the engine compartment to the heater core behind the dash should be checked. They should be...
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Intermediate steering shaft is rubbing frame on right turns only.
Hello, thank you for writing in. Without knowing the make and model of your vehicle is it difficult to say what the issue may be. The best method for diagnosing this rubbing is to do a full inspection of the...
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shake around 45-50 mph 2006 Honda Odyssey
Hi there, thanks for writing in about your 2006 Honda Odyssey. Try to drive your vehicle in 3rd gear without overdrive on and see if problem goes away. The problem is at the speed where the lockup torque converter locks....