Popular questions

Question
I had to change output the speed sensor, but my car still drive in 5 high. What do I need to do?
Hi there. Since you have replaced the speed sensor and your vehicle is still giving you the engine light code P0720 for the speed sensor circuit malfunction, then you would need to check the circuits from the speed sensor to...
Question
Owner had to replace five tires in 11 months
Hello there. The tire issue is not uncommon for your vehicle. The 550i uses tires and wheels with lower profile sidewalls. These increase traction and handling at the cost that they absorb impacts differently. Hitting a pothole or other rough...
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My 2007 Pontiac Grand Prix makes a humming noise when the car is idling but if I turn the steering wheel a little it stops the noise.
Hi there. The humming sound could be the power steering control valve sticking. Check to see if the power steering oil level is correct. Top off the power steering fluid if its low. Also look at the fluid and see...
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Major oil leak
Hi. Large oil leaks can be difficult to pinpoint because they get all over the undercarriage. The best way to find a leak is to clean off the engine and then add dye to the system. Running the engine with...
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2009 chevy silverado, has a clicking sound by the steering colum. The trans temp blink dashes, then the temp, wint shift into tow
One of the blinking indicators, or the malfunction(s) that it represents, would have to be traced and resolved before it could be determined if they all have a common cause. The clicking noise is actually more likely to be from...
Question
Audi A4 engine not running smooth
The first thing would be to check the throttle body to see if it is really black from oil? If it is then you may have leaking oil seals in the turbo causing you to burn oil. This may also...
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How Long Are Headlights Bulbs Supposed to Last
The lifespan of a headlight bulb in a vehicle is not possible to predict with much accuracy. There are just too many variables affecting how long your bulbs will last. These factors include: Wattage rating of the lights....
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What should I know about the immobilizer system?
Your car is equipped with both an alarm and an anti-theft system called an immobilizer. While the alarm will sound and the lights will flash, it’s the immobilizer that actually prevents a thief from stealing the car. Your keys include...
Question
DPF filter light is on
Hi there. The diesel particular filter captures the soot from the diesel burning off from the combustion chamber and keeps it from entering the atmosphere. You can remove the innards filter, but keep in mind that soot will be more...
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Difficulty shifting to higher gears
Hello there. Thanks for writing in about your 1972 Chevrolet El Camino. A few different faults could cause the vehicle to have shifting and acceleration problems. The most common would be the transmission linkage, low fluid level, torque converter, or...
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Odometer reading is about 550,000 miles off.
Hey there. This is a problem with the Body Control Module (which keeps a copy of actual mileage) not re-updating the instrument cluster appropriately after a power outage. Contact your Saturn dealer service center for "Subject: 2000 - 2002 Saturn...
Question
What does the Door Ajar light mean on the dash?
Your car is equipped with a number of different sensors to help ensure that you and your passengers stay as safe as possible. The Door Ajar light on the dash turns on automatically when you crank the car, but should...
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What does the “Fuel level low” warning mean in the message center?
While you can easily see the fuel gauge in your car, Ford built in a couple of additional safeguards to help protect you from running out of gas on the road. It’s all too easy to overestimate how much gas...
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Loud rough ride coming from the front of car.
Hey there, thanks for writing in to YourMechanic. There are many things this may be, ranging from front differential problems to an out of balance tire to bad wheel bearings. For an issue like this I would recommend having a...
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97 cavalier flooded with fuel due to a fuel injector missing a o-ring. No start no crank
If you have already found the reason for the fuel flooding the cylinder then you will need to remove spark plugs and disable ignition and turn over motor to get out excess fuel. Then you will need to replace the...
Question
How hard is it to replace the EGR valve on my 2000 Ford Focus
Hi there. If the bolts to the EGR (exhaust gas recirculation) valve are frozen in place by rust, you could put a small blow torch to the bolts and get them cherry red and then try to remove them. If...
Question
Engine won’t start sometimes, problem goes away later
Jeep released a Technical Service Bulletin (TSB) that covers this no crank or no start problem. The TSB 08-007-08 dated 7/04/2008 states that the wireless control module (WCM) is susceptible to locking the ignition after getting a static charge from...
Question
I just used semi synthetic oil instead of full synthetic in my 1996 lincoln town car executive
Hi there. If you asked this question about 10 years ago - then yes, you might have issues with seals or gaskets wearing prematurely. However, as technology has improved, the gap between semi-synthetic and full synthetic is not as big....
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My car's temperature goes between 102 degrees and 78 degrees Celsius. Is this normal? - 2013 Honda Jazz 1.3
Hi there. From the description you have provided, your vehicle's temperature going down when driving uphill is opposite from the usual complaint. Being in second gear while going uphill, the engine's RPM being higher should increase coolant circulation. The engine's...
Question
Why wont my transmission go into fifth gear for my 40 volvo
This may suggest the transmission synchros may be wearing out. Your transmission has small gear synchronizer rings that help to move the transmission in and out of the various gears. When these begin to wear out, you may notice it...
Question
Engine performance - 1997 Nissan Maxima
If the engine is running as poorly as you describe, it will actually be cheaper to pay the diagnostic fee so that the correct repair can be made rather than to continue to waste fuel. Obviously, a poorly running engine...
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does flushing your coolant system fix mixed fluid buildup?
Hi there. You may have to flush the engine a few times and then run fresh water a couple times until system is clean. Then refill it with the proper coolant and distilled water in a 50/50 mixture. If you...
Question
Biased pre-purchase mechanic evaluation.
Hi there. I don't think you're going to have any issues with our professional mobile mechanics having any bias; especially if the car is from a dealership. Many of our mobile mechanics are former dealer mechanics who saw the benefits...