Q: Check engine light

asked by on September 26, 2016

Random misfire in codes, replaced plugs, can't get check engine light to go off any suggestions?

My car has 80000 miles.
My car has an automatic transmission.

Electrical components are not working Inspection $79.99 - $99.99 Get a Quote

Hi there, thanks for your question. I’d be happy to help. A [misfire can be caused by a variety of things other than bad spark plugs such as bad plug wires, vacuum leak, dirty fuel injectors, a weak fuel pump (low fuel pressure) or a faulty fuel pressure regulator or weak ignition coil to name a few others. I would recommend having an expert from YourMechanic come to your home to diagnose using a scan tool to be sure there are not more codes indicating other components that need to be repaired.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

car wont start says sensor error

Hi there: We need to know what type of vehicle has the ignition sensor error to give you some advice, but you should have a professional mechanic complete a check engine light inspection to determine which sensor is faulty and...

It turns over but won't start. And if it starts, it dies out. When it starts, the pressure gauge goes way above 60

Since you mentioned that the motor will eventually start at times, we can assume that it is getting spark. This means that you may have a fuel delivery issue. This may happen due to lack of fuel pressure, a faulty...

Car won't start up after new battery put in

Hello. The security system has been activated by the battery replacement. To reset the Honda security system: (1) using the physical key, close all doors, (2) insert the key in the driver door, turn to the "Unlock" position, (3) turn...

Gas gauge not registering fuel level

Hi there, and thanks for asking about the problem with your 2016 Lexus RX450H. This doesn't sound like a tank problem, but rather the scenario where the tank includes 2 fuel gauge sensors, and 2 fuel pumps - a fairly...

Need to replace rear brake pads and rotors - 2015 Dodge Challenger

No, that is a high price. 2015 is a recent model year, so check to see if the car is under warranty or extended warranty. Also, the root cause of the binding should be considered because your car is not...

How can I reset the computer

Unhooking the battery and jumping the positive and negative terminals should clear any trouble codes. Be sure to unhook both as this can be very dangerous if not done properly. If not experienced in doing this, I would recommend...

Oil leaks when engine is idling

The oil leak may be the oil filter or oil pressure sensor. This is if the leak is engine oil. If it is power steering oil then the rack and pinion is leaking. If the brake fluid is low then...

Emergency brake locked up

This is a common problem for your vehicle. The emergency brakes in your vehicle are built into the rear calipers. Over time, corrosion will bind up the mechanism inside the caliper and will not allow the brake to release. The...

Related articles

Common Signs of a Dirty Air Filter
A car air filter cleans the air entering the engine. Signs of a dirty air filter include a misfiring engine, unusual noises, and reduced fuel economy.
P0801 OBD-II Trouble Code: Reverse Inhibit Control Circuit Malfunction
P0801 means an issue with the reverse inhibitor switch making the vehicle unable to be placed in reverse or capable of doing so while driving forward.
P0400 OBD-II Trouble Code: Exhaust Gas Recirculation Flow Malfunction
P0400 code definition Exhaust Gas Recirculation Flow Malfunction What the P0400 code means P0400 is an OBD-II generic code that the engine...