Q: Can't get an emissions test due to faulty plug

asked by on

I have no power to the PCM or DLC to get an emissions test; the plug has no power. I checked the fuse and it is blown, but I can't get close with another fuse before it sparks. The cigarette lighter and DLC are on the same fuse, but I can't get the cigarette lighter out to replace it.

Hi! Since the power fuse was blown and your attempts to install a new fuse causes sparks, it would seem that there is a large draw or short on that power system. First, disconnect the ground cable to the battery and install the new fuse, then reinstall the ground cable to recheck the circuit. If the fuse blows again, then there is a significant short in that circuit and will require a skilled technician to diagnose and repair your blown fuse.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Can't get an emissions test due to faulty plug

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Late on oil change leads to loud car

If you ran your engine low on oil it may have damaged the engine and should fill oil and have a mechanic check it to see if it is an engine or exhaust noise?

Q: Failed emissions after P0505 code... Considering options

The mechanic that checked your vehicle is giving you a possible fix by cleaning the throttle body of built up carbon. This may help with the idle and P0505 code, and for passing the emissions test. The throttle body is...

Q: ABS locking up

Hi, it sounds like you are having a brake problem. I would inspect the brake pads, calibers, and discs. I would recommend having a qualified mechanic come out and inspect the brakes for you. For your safety, I would recommend...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.