You can test for proper input voltage using a Digital Volt Ohm Meter (DVOM), also known as a multimeter. This test is best performed with the key in the On (engine off) position.

One dirty sensor could be hurting your car’s performance — learn which one it is, the symptoms to watch for, and how to clean it easily.

I need to diagnose a MAF sensor and Im using this guide as reference. I have Mastech MS8268 and I bought these wire piercing probes. However I cannot connect the probes to the multimeter as the ...