Skip the auto shop - Our mechanics make house calls

Q: ignition coil has a melted connector.

asked by on

I have a 2007 lexus es350 and number 1 ignition coil has a melted connector. The coil cosmetically looks fine, not melted but the connector on the wires melted. what would cause this?

A: It sounds like the coil primary side circui...

It sounds like the coil primary side circuit has excessive low resistance, and is like a short. This could have overheated the wiring. I would recommend replacing the coil and also replacing or repairing connector. If you would like to have these repairs done, a certified technician from YourMechanic can come to your car’s location to inspect the wiring and follow through with the right repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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!

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: How can I start my car remotely?

There are a number of after market options available. They require installation by someone who can read a wiring diagram and connect to the vehicles starting and PCM systems. If your comfortable working on your own car, google remote starting...

Q: Car turns on and runs fine when cold but when warms up it randomly turns off

This is a common sign of a faulty ignition coil. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeatedly The insulation develops small fractures that open when heated and close...

Q: If you was hooking up a OEM cooling fan that has only 2 wires and one speed but my car has a high and low speed, what wires would you hook up?

Hi there. Check the high and low circuits with a digital meter for a voltage reading. The low should have a lower voltage reading than the high. I recommend putting the wires on the high selection to prevent the engine...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...