Q: Is it bad when oil gets into the throttle body?

asked by on

In November my throttle body was acting up. Lightening bolt n traction control light came on. I had it cleaned and all was well. 3 days ago it happened again. This time worse, where it wouldn't drive right, made noise, had to get it towed. Engine light never came on. I had the throttle body replaced. The mechanic told me there was a little oil in the old throttle body and that my engine, i guess, could have blown up. Now I am really worried about the oil that was in the old throttle body. He said the new one could last 6 months or 6 years. They don't know how oil got into it. Maybe it blew in? My truck is paid off and I really love it and don't wanna buy a new one. But I want to be sure it's safe or can be fixed that I can keep it going a couple more years. Thank you for your help!

My car has 110000 miles.
My car has an automatic transmission.

Hello, I believe what you are describing is a problem with your PCV valve. A bit of oil in the throttle body is not going to harm your motor and is certainly not going to cause it to blow up. At an idle, the PCV valve restricts air flow, to reduce this problem. At high manifold vacuum (idle), a spring loaded valve is drawn up and partially restricts flow to the crankcase. The PCV system is relatively simple. An inlet hose connects to a filtered air source. This is used to supply clean air that is drawn through the engine. Most of the time this air is supplied through the engine air filter. On a few designs there is a separate inlet filter that cleans the incoming air for the PCV system only. This filtered air flows through the engine, picking up fumes and vapors. The air exits through another hose, connected to manifold vacuum. The flow of air draws fumes from the crankcase and burns them harmlessly in the engine. This also creates a slight vacuum, relieving any pressure that may build. Negative pressure helps to prevent oil leaks and oil consumption by the engine. The PCV valve also helps regulate the amount of air flow, which helps prevent oil being drawn out of the engine. When the PCV valve is not working correctly, this will cause an imbalance in air flow and vacuum causing the check engine light to come on. i would suggest having a professional from YourMechanic come to your location to take a look at your Jeep.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Is it bad when oil gets into the throttle body?

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: My car is sputtering and when I drive it’s louder and then it was and more shaky. And when I go to speed up it has a hard time.

If the vehicle has less power and does not run correct and seems louder than it should can be caused by the air filter clogged or the catalyst is clogged. It can even be loss of fuel pressure and clogged...

Q: Cracking/popping sound in driver dashboard area - 2013 Jeep Compass

Hi there. The noise heard and the sluggish A/C may be related. It is fairly common for an air distribution actuator to fail. These actuators change positions of doors in the HVAC (heating, ventilation, air conditioning) distribution housing. Typically, a...

Q: Clutch Problem with Jeep Patriot

The clutch system does have several parts that if worn or failing could account for the rattling noise. The system would have to be inspected first hand though to pinpoint the exact issue and estimate the cost. If you desire...

Related articles

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...
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...
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.