Skip the auto shop - Our mechanics make house calls

Q: Where is the map sensor located c

asked by on

Car cranks but want stay running unless my feet is on gas pedal after new fuel pump,straner,etc code says map sensor or cracked vacuum line.

My car has 155 miles.
My car has an automatic transmission.

A: The MAP (Manifold Absolute Pressure) sensor...

The MAP (Manifold Absolute Pressure) sensor should be located just in front of the throttle position sensor toward the back of the left side of the engine (assuming you are standing in front of it facing it). If you have access to a volt meter, I would recommend testing it for power. It should read ~1.5 volts on the return signal green wire and ~4.5 volts and wide open throttle. If this checks out fine, then this likely points to a vacuum leak. Vacuum leaks can be very difficult to trace. I would recommend having an expert from YourMechanic come to your home to diagnose your stalling issue firsthand for an accurate repair.

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: I have trouble starting the vehicle every time I put gas in the car

As you may know, this issue is commonly related to the evaporative emissions (EVAP) system which is comprised of a few components, one of which you have already addressed, the purge valve. In some cases, when you have an air...

Q: Will not start back up

Hello there, many faults will cause your 1997 Chevrolet Cavalier to die and not be able to be restarted. The most common faults are with the battery, alternator, battery cable, fuel pump, fuel filter, wiring harness fault, or MAF sensor....

Q: Air conditioning not working

The most common cause is low or no refrigerant. The system would need to be checked for leaks before recharging. Leaks can occur anywhere. If this is not the case, there are many other problems that can cause the AC...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...