Skip the auto shop - Our mechanics make house calls

Q: The ground from the oil pressure sending unit is melting on a 2000 Volkswagen Golf

asked by on

2000 Volkswagen Golf. The ground from the oil pressure sending is melting randomly. When I turn the car on, it will run with no problem. I turn it off and the key and the wire start to smoke, no crank. I turn the key and it runs fine. I turn the key and the wire is smoking.

The wire will smoke for one particular reason. You’ve got bad grounding going to the engine, so you’ll need to reground it. Run a new ground from the battery’s negative terminal to the engine block. When that ground doesn’t work properly from the battery to the engine, it will start using the oil pressure sending unit wire as a ground wire. When this happens it will start melting everything out. Pray that it hasn’t shorted out the computer yet.

So reground the bad ground and rewire the oil pressure sending unit wire to ensure that it’s not melted as well. Bad grounds tend to do this all the time. I’d recommend having a mechanic check that car out to diagnose this wiring problem accurately.

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!
  • Home
  • Questions
  • The ground from the oil pressure sending unit is melting on a 2000 Volkswagen Golf

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: Oil light comes on only when I'm stopped at a light

Hi and thanks for contacting YourMechanic. The oil pressure sensor has either a loose connection or the sensor is contacts inside it has corrosion on it. Look at the wires to the oil pressure sensor and make sure that they...

Q: Oil leaking and engine went out after sitting for 5 months.

If oil dumped out of the vehicle and then it stopped running, there was likely a catastrophic failure and subsequent lack of oil pressure. From your description, it sounds like there is a good chance the engine is ruined. A...

Q: Car door not closing and locking properly

It sounds like there is a problem with your door latch. The door locks are tied into the door latch so that explains why your door does not want to shut properly and your power locks are jamming up. I...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.