Skip the auto shop - Our mechanics make house calls

Q: BMW 35I check engine light on after using siphon

asked by on

BMW 35I 2008. Check engine light turns on after using siphon. What can I do?

A: I wouldn't use a siphon again. I've...

I wouldn't use a siphon again. I've got a video about it and then I said don't use it, because I've seen it cause problems. What you want to do is wait when you are almost out of gas, fill the tank up with premium gas. Then just have a good mechanic, like one from YourMechanic, plug the machine and reset until the codes are off. Often the codes won't come off, because when you get back to your normal fuel it will stop. BMWs are so complex and there are so many sensors on them. Putting that cleaner on them will often make them run strange and the computer will catch that and that will trip the code. If you want to have the vehicle diagnosed properly, a qualified technician can inspect your Check Engine Light in person to let you know exactly what should be repaired.

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・Save up to 30%

Get a quote

What others are asking

Q: Battery good, maybe starter.

Hi there, I am assuming the engine is not turning over when the start/stop button is being depressed. This would possibly indicate a problem in the CAS (Car Access System). In your BMW the key transmits a code to the...

Q: Car idles high and then low, and then becomes a 30 second cycle.

Hello. A few things I would check are the throttle body, the idle air control valve, and the vacuum hoses. A dirty throttle body or idle air control valve can cause the idle to fluctuate. I would also examine the...

Q: Service Engine Light staying on.

This code is for the oxygen sensor (O2) heater control circuit. O2 sensors in modern vehicles use a heating element to bring the sensor up to operating temperature faster. This allows the powertrain control module (PCM) to use the sensor...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...