Q: Map sensor car won't start up good ?

asked by on

My CEL code in my rsx type s flashes 5 indicating that my (MAP) sensor manifold absolute pressure sensor is whats wrong. my car hesitates to start sometimes won't start at all if I changed the map sensor will the car start up new what to do ? I checked the spark plugs and cleaned them properly help please the only problem with the car is starting up once started up the car drives fine it's starting the car is was difficult it sometimes will leave me stranded but the car never stalled on me it just I gotta hold the key on for the car to keep cranking and start

My car has 128543 miles.
My car has a manual transmission.

Your MAP sensor is an important input for your computer. It helps determine the load on the engine to calculate the correct amount of fuel to inject. It sometimes takes a few seconds for the vehicle to realize that the sensor is not producing a good signal.

At that point, it will use other methods to determine the fuel rate, such as pre-programmed fuel maps, throttle position, etc. I would suggest replacing the MAP sensor and retesting. If you would like to have it checked first, a certified technician from YourMechanic will be able to scan your vehicle and test components to determine the root cause of your starting issue before making a repair.

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. Map sensor car won't start up good ?

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: Got honda fit 2012 with only 52000km. A few time I heard like a scratching sound like paper edge rubbing when I turn the the key.

Hi there. The issue seems to be the ignition switch. The black covering inside the switch may have come apart causing the scratching noise and keeping the vehicle from starting. I recommend seeking out a professional, such as one from...

Q: odd noise coming from wheel area

Racers call that power braking. It sounds like you spun the tires off the line. That is a normal thing to happen when you take off aggressively. In a more powerful vehicle, the tires can spin for much longer than...

Q: There is a severe oil leak in my car

Hi and thank you for contacting YourMechanic. The blue smoke from your exhaust indicates that the piston rings are worn and oil is getting past them causing the blue smoke. The only fix to this problem is rebuilding the engine....

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...
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.