Skip the auto shop - Our mechanics make house calls

Q: Red gear/ sprocket + exclamation warning light. when I scan it the code AOB1 comes out with the message: CAS:input selector lever

asked by on

Red gear/ sprocket + exclamation warning light. when the car is scanned the code AOB1 with message CAS: input selector-lever position implausible . the car is also stuck in park
My car has an automatic transmission.

The red gear symbol is the transmission version of a check engine light. It alerts you that a fault has been detected by the transmission controller. The "gear selector implausible" message means that the controller cannot make sense of some of the input signals it is seeing. Your transmission is electronically controlled and right now, for some reason the controller can’t figure out what you want to do. The gear selector has a switch that tells the controller what position it is in, but there are other sensors in the system that don’t agree with what the gear selector sensor is saying. This doesn’t seem to be a common enough failure to have formed a pattern, so It’s going to take some diagnostic work by someone with the appropriate scan equipment. You can have this done right there at your home or office by contacting Your Mechanic. They will send a technician to you who can check out your BMW and let you know what it’s going to take to solve the problem.

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!
  1. Home
  2. Questions
  3. Red gear/ sprocket + exclamation warning light. when I scan it the code AOB1 comes out with the message: CAS:input selector lever

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: I replaced solenoid and and sensor in my transmission still won't shift properly 1997 Dodge RAM 1500

Hi - the lack of up-shifting in your transmission could be an internal speed sensor, or line pressure failing to engage higher gear clutch packs. With your higher mileage, this is difficult to tell without real diagnostic testing. Check for...

Q: Rough idling when the MAF is plugged in

If the problem is present when the MAF sensor is plugged in, this is a classic sign something may be going on with the MAF sensor. Many other things can cause a vehicle to idle poorly as well though. The...

Q: Battery keeps dying

The excessive buildup of corrosion on the battery is an indication that the battery top posts are leaking, and the battery is sulfated, meaning that it needs to be replaced. The electrical system would need to be checked for proper...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.