Q: Check Engine Light is on and I've noticed one minute my gas says a half a tank and the next it's at a quarter

asked by on

My check engine light came on recently and I just got my fuel pump replaced and thought I had everything under control. It came on again and now I really have no idea what could be going on other than something with the gas. Iv noticed that some times it will say it's at a certain point say a half a tank and I would shut the car off and turn it back on and it would be lower than that. I'm not really sure what could be going wrong with it. There's no sounds or anything coming from my car either.

My car has 112014 miles.

Hello. This is most likely a faulty fuel sending unit. This is a unit that sits in the fuel tank that sends a signal relaying how much fuel is in the tank. These commonly go bad on many cars. If you need help having this looked at, a certified professional from YourMechanic can come to your car’s location to diagnose the Check Engine Light more thoroughly and perform repairs that are needed.

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. Check Engine Light is on and I've noticed one minute my gas says a half a tank and the next it's at a quarter

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: Cad wont go faster than 35mph

Hello. From what you describe it would appear that some sort of serious issue may have occurred. If you've found oil all over the engine I would try to figure out where it came from. It is likely that an...

Q: After adding fuel additive, SUV performed badly

I would suggest checking the EGR valve (exhaust gas recycle). Inside your motor, temperatures can reach 2500 degrees. This is when the EGR valve is needed. When engine temperature is slightly cooler, such as when idling, the EGR valve function...

Q: Turns over but will not start and has a strong odor of gas.

Check the location of where the fuel smell is emitting from on your vehicle. If the fuel smell is coming from the fuel tank area, then the fuel pump, fuel line, fuel filter, fuel fuller neck, charcoal canister, or the...

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...
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...
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...