Q: Oil pressure and battery light stay on when ignition is off.

asked by on

I noticed about a week ago that when I turn my car off and take the key out, the oil light and battery light stay on. This drained my battery until it died. I got it checked and charged and replaced the alternator to be safe. I also for the oil changed at a shop.

The problem persists. I have checked all connections and everything Looks okay. What could cause the oil pressure and battery light to stay on after the car is off? I have to keep unhooking the battery to keep it from draining while it sits. Note, the aforementioned lights turn off once I turn the igition on.

My car has 149000 miles.
My car has an automatic transmission.

Hello. If this is occurring, then there is a short in the electrical someplace. Most of the time, the issue is in the ignition switch. The switch fails internally and causes some circuits to stay on which will drain the battery. It can also be a short in the harness or in the fuse box but the ignition switch is the most common on this car.

If you want to have this electrical issue checked out, consider having a certified mechanic, such as one from YourMechanic, come to your home or office to inspect the electrical system and suggest any necessary repairs.

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 and battery light stay on when ignition is off.

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 hums when I try to start it on cold mornings. Battery starter and alternator tested and all are fine. I need help please!

A car battery can appear to be 100% "charged" and still be essentially useless. The only way to determine the viability of a "used" battery is to perform a load test on the battery at a professional battery shop or...

Q: Check engine light came on & car drove roughly

You are absolutely correct. The MIL came on as a result of a fault in the engine computer. Because your vehicle is newer than 1996, then it has OBD-2 diagnostics which will allow any scan tool with OBD-2 capabilities to...

Q: My vehicle has a Starting/Sometimes running issue. What's wrong?

Hi there. Check to see if the vacuum pump has seized up on the engine. If the pulley is not turning then the belt will make a screeching noise and put a huge load on the engine. The extra load...

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...
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...