Skip the auto shop - Our mechanics make house calls

Q: change3time sensor circuit ABank1@stillitgh goes on

asked by on

Sender circuit A bank 1 light goes on I change sensor 3times

My car has 42000 miles.
My car has an automatic transmission.

Hi there. What code is stored? When a vehicle computer stores codes, they are meant to lead in the direction of the fault; not diagnose the fault. The computer presents us with a code that can specify a specific circuit, such as in your case. The computer has a set program parameter for that specific circuit. When the circuit deviates from that parameter, the computer sets a code; it does not know what caused the deviation, only that it failed. So, codes are not intended to diagnose, but to aid in the diagnostic process by leading a technician to the circuit/system at fault. It sounds like you could have either a wiring harness, engine computer, or mechanical fault. I strongly suggest you acquire a qualified technician to perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several technicians available that can assist you with a check engine light inspection.

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: My car's power steering is not working

This suggests your power steering pump may be failing or you have a leak elsewhere in one of the power steering lines. The power steering system operates on very high pressurized hydraulic pressure (in some cases as much as 300...

Q: How many transmission, engine, torque strut mounts I need for replacement?

Generally when one engine or transmission mount fails, others may fail soon after. When one mount fails, added stress is placed on the remaining mounts to hold the engine and transmission in place. Your vehicle should have 4 engine and...

Q: Brake pads fixed, parking brake, car won't start.

If the parking brake warning light is on and yet the parking brake is disengaged, that typically means that the switch is stuck. If the warning light yo are seeing though relates to the brakes generally, that could mean 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...
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...
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.