Q: Oil Pressure fluke?

asked by on

When at a stop light today, when the light turned green and I put my foot on gas pedal at the same time the oil pressure light went on and the car died and was stuck there at the green light. I quickly turned off my car and started it back up with no problem, the oil pressure light went off as it normally does after starting the car and the car has been running fine the rest of the day. Was this a fluke?

The oil pressure most likely dropped as a result of the engine dying simultaneously. The question is what caused the car to die upon takeoff? This may happen for many different reasons, however some of the common causes of this may be a dirty or faulty idle air control valve or a faulty throttle position sensor.

The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. Since this valve is controlled by the vehicle’s computer, it will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed with the help of the idle air control valve. When the engine RPM drops below the normal range of about ~800 RPM, this often times will cause the engine to stall indicating a dirty or faulty idle air control valve.

The throttle position sensor (TPS) is a sensor used to monitor the throttle position of the throttle plate inside the throttle body in relation to your foot position on the gas pedal. Based upon the inputs from the sensor reading your foot’s position on the pedal, the ECU then makes the direction to supply more or less fuel to the motor. When this sensor is not working properly, this can cause intermittent responses when pressing the gas pedal. I would suggest having a professional from Your Mechanic come to you home to diagnose your car’s running condition.

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. Oil Pressure fluke?

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: New IAC Valve - High Idling but old IAC Valve normal (800/900 rpms) 1993 Saab

Hello - I think you were on the right track with the idle air control valve. It sounds like your engine is getting extra air from an intake leak somewhere. It's also possible there is a throttle body problem. The...

Q: Engine cranks when cold but not warm

A scope (oscilloscope) exam during those few minutes after it starts, and while the engine idles roughly, will reveal the cause. It is either ignition or fuel system related. To schedule a rough running engine diagnostic(https://www.yourmechanic.com/services/car-idle-is-rough-inspection) please feel free to...

Q: I took my car to a shop to fix my thermostat and water pump, now my car won't accelerate fast past 3000 rpm ? 2012 Dodge Charger

Hi - your symptoms suggest a problem with the throttle position sensor. This component is falsely limiting throttle position and power demand to the engine computer. I recommend a loss of power inspection performed by a mobile, professional mechanic, such...

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...
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 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...