Skip the auto shop - Our mechanics make house calls

Q: Sensor messed up

asked by on

The catalyst monitor is not ready. It has been like this for the last 3,000 miles, and I am not sure why. Maybe a sensor is messed up.

Hello. There should be a Check Engine warning light on the dash display. It could also be a loose connection if you recently had exhaust work done. If you have any failure in the catalyst sensors or wiring, it should make the engine warning light go on. These sensors and the engine management are very sensitive to changes which will cause the warning light to come on. If you do not have a scanner for your BMW, then go to a qualified technician or shop that does BMWs to have the problem diagnosed.

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 will not start. I trys to crank or something like that. There is oil around the entire engine on every side

Hello, and thank you for writing in. The vehicle is likely protecting the engine and not allowing it to start due to the damages that occur when there is an oil leak. The oil pressure is low, and this must...

Q: Synthetic oil brand

We would use Castrol 5w30 oil. The vehicle does recommend full synthetic but it is not required. You would have to request the full synthetic Castrol 5w30 or the standard Castrol 5w30 oil. If you special request a different oil...

Q: It has a bad miss and back fires sometimes I have changed the spark plugs and fuel filter what else could it be

Hello there, it is very common to have a misfire fault as vehicles age and go up in mileage. The most likely cause would be the ignition coils, fuel pump, fuel injector, MAF sensor, oxygen sensor, or a wiring fault....

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.