Skip the auto shop - Our mechanics make house calls

Q: My Check Engine Light came on and reads the code P0108. What is the problem?

asked by on

My check engine light came on and truck sounds like it wants to turn off I checked on the codes and this is what it marks p0108 what do I need to do

My car has 160000 miles.
My car has an automatic transmission.

Hello. The code P0108 means the manifold absolute pressure (MAP) circuit is detecting a high input voltage. The PCM and MAP sensor communicate through a 5 volt wire that changes voltages as the sensor’s reading changes. When the sensor detects a voltage too high for normal specifications, the code is set to inform you there has been a malfunction. These sensors will detect any issues with engine vacuum, a bad sensor, or a short in the circuit. You can test vacuum if you are worried that may be an issue. If the engine is running sound, and there has been no damage to the wires, chances are you need a new MAP sensor installed.

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!
  • Home
  • Questions
  • My Check Engine Light came on and reads the code P0108. What is the problem?

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: Can a P0108 code be caused by oil leaking onto the ignition wires 1998 Pontiac Bonneville

Hello. To answer your question, no, oil on the ignition wires will not typically cause this. The code you are getting if for a faulty MAP sensor. This sensor fails and causes this code to appear. It can also be...

Q: My indicator light goes on when I turn on the engine even after checking a 4 month old gas cap.

The check engine light is only an indicator letting you know a problem is detected in the computer systems of the vehicle. You would need to have the computer scanned to get the codes that are stored and have the...

Q: loss of power when driving check engine light blinking at 30 mph just changed manifold intake have p0171 p0174codes

You are having problems with the fuel injection system poppet injectors not opening up or stuck open causing the misfire. You may have a bad fuel pressure regulator or you did not seal the fuel lines into the regulator good...

Related articles

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...
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...
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...