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.

A: Hello. There should be a Check Engine warni...

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: startung the car issue

During the most recent episode when the car yet again failed to start, the diagnostic would begin with testing of the battery. If you have a fully functioning charging system (you mention the alternator is new but charging system should...

Q: I have a XC90 2013 and having problem with right front brake squaling noise when the brake is apply at slow speed?

The first and most common cause of noisy disk brakes is worn brake pads. Many manufacturers build a "noisemaker" into the brake pads that scrapes the rotor and makes a loud screech when the pads are worn below the minimum...

Q: Looking to buy used BMW, but...

If you are purchasing any vehicle with a model year of 2009 or newer, I would recommend getting a vehicle with a low of miles as you can within your price range. The lowest mileage usually indicates a better vehicle...

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...