Q: Mass airflow sensor

Hi. You don't specify which lights are stuck on, so I'm going to assume you're talking about the headlights. The problem could be the headlight switch, a stuck closed relay, a short in the circuit or a problem with the...

It sounds like you may have a hole or crack in your fuel tank. I would recommend enlisting the help of an automotive service professional to inspect your fuel system to find the source of the leak. If the fuel...

Hello. Your coolant should be changed as regular maintenance. The coolant in your car should be changed about every 5 years or 100,000 miles, whichever comes first. Having it changed will help the engine and various other components last longer....

Hi. The concern you are describing for your 1999 BMW 318i sounds like that of a worn engine or transmission mount (https://www.yourmechanic.com/services/engine-mount-replacement). The transmission and engine mounts have rubber bushings inside of them which dampen the engine vibrations. The mounts...

Hello. If the P0151 (https://www.yourmechanic.com/article/p0151-obd-ii-trouble-code-o2-sensor-circuit-low-voltage-bank-2-sensor-1-by-jay-safford) code persists after replacing the oxygen sensor, then it may be possible that the issue is with the wiring. If there is any damage or wear to the oxygen sensor connector or wiring there may...

Hi, thanks for writing in. The vehicle is not safe to drive with a broken link. You can try and drive it the 60 miles if you drive slow and avoid sudden lane changes, but I still would not recommend...

Hi there. Disconnecting and re-connecting the battery, although the right thing to do while working on the fuel system, has tripped the security system and is not allowing a "start" sequence. (You don't mention it, but the security light in...

A lengthy Technical Service Bulletin (https://www.yourmechanic.com/article/how-to-use-a-technical-service-bulletin-tsb-to-diagnose-and-repair-a-car-by-valerie-johnston) (TSB) dealing with this issue was published by Nissan in 2006. The TSB outlines a repair procedure for the fuel pump that resolves a known issue with fuel leaking back into the tank instead...

It's probably clutch related, for example due to worn out friction material and/or a pressure plate defect BUT it's also possible that the motor mounts could be implicated and the engine as well if the engine is bogging down (due...