Q: Car will not start. Will only move to ACC mode
Car will not start after I depress the brake and push the start button. It only moves to ACC mode. Diagnosis showed a U0100 code. The mechanic says it has to do with a faulty BCM that should be replaced. Car starts after staying idle for some time.
My car has 22000 miles.
My car has an automatic transmission.
Recommended Services
| Mass Airflow Sensor Replacement | $188.36 - $786.53 | Get a Quote |
| Air Filter Replacement | $104.43 - $174.79 | Get a Quote |
| Car is not starting Inspection | $94.99 - $114.99 | Get a Quote |
This relates to a faulty mass air flow sensor. This is a unit that monitors air intake into your engine as it is mixed with fuel prior to being injected into the motor. When this is not working properly, many issues can arise. Some of the causes for this not work are:
- Faulty mass air flow sensor
- Intake air leaks
- Dirty mass air flow sensor
- Dirty mass air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor circuit poor electrical connection
To have this scoped out further, I recommend having a certified professional from YourMechanic inspect the starting problem in person to verify whether or not you need a mass air flow sensor replacement.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
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
What others are asking
1992 Ford Taurus won't go into gear
Though the information provided on your Ford Taurus is a bit limited, I can make a first suggestion that will hopefully lead us in the right direction. While attempting to shift out of park, carefully feel the gear selector as...
Loss of power during driving - 1993 Dodge Dynasty
Your "lack of power, or ability to build up speed" symptoms sound like a fuel supply problem - perhaps a clogged fuel filter (https://www.yourmechanic.com/services/fuel-filter-replacement), or a failing fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement). Have a professional mechanic, like YourMechanic, check for fuel pressure...
I have a humming winning noise coming from I believe under the truck, only does it when moving..ideas??
Hi there. If you are having problems in the hubs, then the front drive axle and transfer case may have issues. Have the noise checked and isolated by an expert if you haven't already. Whining noise sounds like it is...
My car's oil cooler line is leaking antifreeze
Hello. From what you describe, it appears that you are being provided with conflicting information. Oil cooler lines will usually leak oil, as oil is what flows through those lines. If the engine is leaking coolant, then it is either...
Van not blowing hot or cold air 2006 Chrysler Town & Country
Hello - the lack of fan functionality (https://www.yourmechanic.com/article/what-components-of-the-heating-and-ac-system-are-most-likely-to-fail) in the front only of your van could be caused by either the front fan, the fan control switch or the front fan motor resistor pack failing. If the front fan works...
Replaced fuel pump. Car won't start. 2002 Infinity I35
Hi there - the metal component you describe is a fuel check valve on the fuel return line. Its function is to maintain a small amount of pressure in the fuel system so that starting does not require the fuel...
The driver side power window will not roll back up
The most common cause of the window will not roll up (https://www.yourmechanic.com/services/window-is-not-going-up-or-down-inspection) is caused by the window regulator binding up causing the motor to bind. I would recommend having the motor and regulator checked and replace motor and regulator. (https://www.yourmechanic.com/services/window-motor-regulator-assembly-replacement)...
Car radio wont turn on.
Hi there. Sometimes when major mechanical work is completed, a mechanic will forget to reattach some accessory switches; assuming they were removed. It's also possible that during the service, a fuse that powers the radio or electrical relay was damaged...
Po741 code
Check to be sure that the transmission fluid level is correct, especially that the level is not too high or low. Also, check the condition of the fluid. Apart from that, the list of "typical" causes of P0741 (https://www.yourmechanic.com/article/p0741-obd-ii-trouble-code-torque-converter-clutch-circuit-performance-or-stuck-off-by-jamahl-walker) includes:...
Related articles
The Best Used Cars to Buy If You’re an Electrician
As As an electrician, you have to haul around wiring, tools and equipment, and tons of supplies. You can’t get by with a small used car, or even a big one. What you probably need is a good used cargo...
How to Buy a Good Quality Speedometer Sensor
Modern Modern vehicles are great: they offer so many advanced features to help keep you safe on the road. The speedometer sensor is one of those great inventions – created to help you keep to a safe speed and not...
Symptoms of a Bad or Failing Barometric Sensor
Common signs include poor engine performance, like sluggish acceleration, lack of power, and misfires, as well as the Check Engine Light turning on.
Browse other content
Estimates
Services