Skip the auto shop - Our mechanics make house calls

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.

A: Hello. If this is occurring, then there is ...

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?

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!

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: Overheating

You may have a stuck thermostat if it is overheating. If the system was low on coolant from a leak then the water pump or head leaks are common. If system runs normal after cooled and topped off with coolant...

Q: Vibrations in steering wheel and warning lights on

A vibration over 50 mph generally indicates a balancing issue. It would be recommended to get these tires road force balanced. Otherwise undesirable wear patterns and tire noise can develop. The BAS/ESP light may indicate a problem with the brake...

Q: Dashboard lights not coming only

The dashboard lights are controlled by the dimmer switch on the dash. If no lights are working then the most common reason is that the dimmer switch, or all the bulbs that illuminate the cluster, are bad. The switch gets...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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.