Q: Check Engine Light is on. Codes are Bank 1 Sensor 1 Low-voltage, and Bank 2 Sensor 1 Low-voltage. . .

asked by on

. . .I just got the vehicle back from the repair shop, where I had to get a new fuel tank installed (it was punctured). Since I've gotten it back, it's got zero power, won't accelerate, feels like the timing is off, or it's not getting fuel, or SOMETHING!! Plugged in the OBD-II diagnostic code reader, and it's giving me O2 sensor troubles. . . .so, i changed the two upstream O2 sensors, and they are still giving me low-voltage trouble codes. Did my mechanic mess something up while he was installing my new fuel tank?

My car has 130000 miles.
My car has an automatic transmission.

Hi there. What seems to be the issue is the fuel pump is not plugged in. The Oxygen Sensors are working and telling you that the system is too lean with having a low voltage reading. If it was just the upstream sensor, then it would be the wiring, however, both sensors are picking up an issue. This is why the engine is running rough and has no power. If you need further assistance with your vehicle having a loss of power, then seek out a professional, such as one from Your Mechanic, to help you.

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. Codes are Bank 1 Sensor 1 Low-voltage, and Bank 2 Sensor 1 Low-voltage. . .

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 reverse went out and the car won’t go over 20mph. It’s making noises as well.

The first thing to do is verify the fluid condition and if it is full. If the fluid is full then smell the fluid and put some fluid on a white towel to see if it is very dark and...

Q: Put new fuel pump, still won't start

Hi, it sounds like you have taken all the proper steps. The concern with the fuel gauge is a common issue when replacing the fuel pump. The fuel level sensor is a separate component attached to the fuel pump. This...

Q: Engine Power Reduced TPS

Hi! Yes the throttle position sensor could very well be the cause. I highly doubt that it is the oxygen sensor though. When the throttle position sensor goes bad the engine will put itself into reduced power mode. I was...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...