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: What does it mean if the Oil Pressure light comes on in the dash?

Engine oil is vital to the operation of your car. If the oil level drops too low, or if the pressure cannot be maintained, then the engine isn’t being properly lubricated and severe damage could result. If the Oil Pressure...

Q: Screeching chirp noise engine - 1991 GMC K2500

Hey there. The A/C pulley bearing may be binding causing the chirping. Try spraying each belt one at a time with some water in a spray bottle. The noise will change or go away when the belt that is chirping...

Q: Sagging headliner coming off the ceiling, looks awful

The headliner is a piece of material with a foam backing which is glued to the roof of the interior. The glue used by Volkswagen to adhere the headliner does not hold up very well, causing the material and foam...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...