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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Sensor messed up

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 leaks coolant but is fine with water. it also recently had a new water pump and thermostat put in why would this happen?

You are probably just seeing "randomness" in the leak rate when you add water versus coolant; both will leak at the same rate. What you want to do, of course, is just simply get the leak pinpointed and repaired. If...

Q: 2008 Land Rover LR2 se. Over heating after cooling fluid was up in the day before. The car took almost 2galons when heated.

Hi There, It sounds like you may have a coolant leak of some kind such as a failing water pump that may be leaking or potentially the beginning of a blown head gasket that may be causing the coolant to...

Q: Hi I have 97 BMW 540i, replaced radiator, water pump, and thermostat.. and a engine temperature sensor and it is still overheating

The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...

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...
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...
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.