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If you are producing too much NOX this means your combustion is running too hot. This is usually caused by the engine running too lean or the EGR system is not flowing enough to cool the combustion. You should remove...

This may be a sign of a vacuum leak. High idle speed, stalling and hissing sounds are common signs of a vacuum leak. When a vacuum leak is present in an engine, this causes an excessive imbalance in the air/fuel...

This may be a sign of a failing throttle position sensor or mass air flow sensor. As you may know, the mass air flow sensor monitors the air flow into the intake as it is mixed with fuel prior to...

The fuel lines should not get clogged, unless they got damaged in some way or the lines pinched when repairs were made, for example, if the fuel tank was removed and replaced. The fuel filter, fuel injectors, pressure regulator may...

You will have to have the computer scanned to get the codes stored to see if there is only codes pertaining to the low voltage condition and have codes cleared using the scanner and then see what codes return. If...

The coolant temperature sensor is likely what caused your Check Engine light. Sometimes aftermarket manufacturers produce parts of a lesser quality than the OEM. However, this does not mean that all aftermarket manufacturers produce faulty parts. It is harder to...

Hello, thanks for writing in about your 2001 Dodge Caravan. For certain, given your mileage and codes for these 2 components, replacing these 2 sensors is the minimum. Cleaning the idle air control valve, throttle body, and PCV valve should...

The flange is integral with a splined yoke. The yoke segment (of the flange/yoke) has a precision, machined, highly polished surface which mates with the rubber seal. Since the rubber seal is spring loaded and is under tension against the...

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With the information that you have provided, I would surmise that you are describing the signs of an engine misfire. Pulling the diagnostic codes with a code reader will probably show codes that relate to a misfire, and could help...

Hello, thanks for writing in. The alarm will go off when this happens because the alarm module feels you shut the trunk and thinks that the vehicle is being tampered with. It is best to unlock the car first prior...

Your car may have a leaking water pump. Try to keep the coolant level full until you can get the cooling system pressure tested to see where the leak is and get the leak repaired. If the engine is...

I would recommend having the vehicle inspected by a qualified professional who is proficient in diagnosing hybrid vehicle issues. It is very likely that the issue was related to the accident that the vehicle was in.

Hi, thanks for writing in. The transmission range sensor switch must be physically aligned with the gear selector in order to work properly. This generally involves putting the shifter in the Neutral position, then adjusting alignment of the range sensor...

This can happen for a few different reasons and is usually related to things like the idle control valve or the MAP sensor. I would suggest checking the MAP sensor as this would seem to have more impact on this...

Your issue could have countless causes, from a vacuum leak to a faulty fuel pump. If the Check Engine Light is on, the first step is to retrieve the associated diagnostic trouble codes (DTCs). These codes serve as a starting...

In regards to the door that doesn't close always. The door latch mechanism can be lubricated with a spray lubricant. A dry graphie or white lithium grease are good lubricants to use. These will need to be sprayed on the...

If the vehicle is 4 wheel drive, it sounds like it could be stuck in 4WD. Another possibility may be that the differential i stuck in the locked state if it is equipped with this option. Lastly, you may want...

The fuel pumps are all inclusive on what they call a fuel module or assembly. These modules include a float (quite like the float on your toilet) that tells the computer and your dashboard where the fuel level is at....

Try and get long large wire ties to hold it together. If it does not work then you will likely have to replace the ECM. If you would like to get this checked out, a technician from YourMechanic can come...

It seems like a sensor problem to me. When the engine reaches operating temperature, the computer takes control with readings from the main sensors, and adjusts for the most efficient mixture. If one of these sensors are reading incorrectly, or...

If you refer to YourMechanic's on-line clutch system tutorial you will see that there are four possible reasons why the clutch pedal would fail to return, namely: 1) a failed clutch release bearing; 2) a failed slave cylinder; 3) a...