What usually causes it
- A sensor that failed and pulls the power line down
- A damaged wire or a short in the wiring
- A bad plug or ground
- A failing engine computer
P0651Starts at: Get it checked this week
Sensor power supply B is not working right
The computer sends a steady low power, about 5 volts, to many sensors. It found a problem with a second one of these power lines.
What to watch for
- Stalling or hard starting
- Several sensor codes at the same time
- The car goes into a low power mode
Can I keep driving?
We rate P0651 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
Quick answers about P0651
What does P0651 mean?
Sensor power supply B is not working right. The computer sends a steady low power, about 5 volts, to many sensors. It found a problem with a second one of these power lines.
Can I keep driving with P0651?
We rate P0651 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
What usually causes P0651?
The most common causes, in order: A sensor that failed and pulls the power line down; A damaged wire or a short in the wiring; A bad plug or ground; A failing engine computer.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.