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

asked by on November 10, 2016

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.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Car shakes and jerks
Hi there, when you say jerking do you mean a vibration or changing in speed? If the car changes in speed, then you should make sure your fuel pressure is okay. Other Impala owners have reported a shaking at startup...
How can I get my car to start when the theft system won't allow my key to turn over?
The security chip is designed to keep your vehicle from starting without the owner's key. Unfortunately, you will need to obtain a key (https://www.yourmechanic.com/article/how-to-replace-a-car-key) with a chip and have it programed to the vehicle. A mobile locksmith may be able...
RPM fluctuates
With the age and mileage of your vehicle, it would probably benefit from a throttle body service including cleaning the idle air control valve. Over time, oil and carbon build up on the throttle blade so it does not sit...
Code AWD malfunction came on, car is in AWD permanently. Transmission working fine.
Hello there, many faults will cause your 2005 AWD malfunction light to be on in your 2005 Ford 500. The most common faults are the shift linkage, low fluid level (https://www.yourmechanic.com/services/transmission-fluid-service), or a wiring harness fault. A qualified technician, such...
car dies while driving after getting warm, starts up after 20-30 minutes.
Unfortunately finding the root cause of intermittent problems can be difficult. Especially if the vehicle must be driven until it is hot before it shuts down. Something that may be worth a try is to allow the vehicle to sit...
Interior lights won't turn off - 1997 Jeep Grand Cherokee
Hello. You are absolutely heading in the right direction. Finding out where the voltage is coming from might be easier to track with a voltmeter and wiring diagram of that circuit if you are equipped with such. This is the...
After installing a new battery, now my car just clicks when starting it.
When installing a new battery, it is not uncommon for various dash lights to come on as the system is reset as a result of the new power source being installed. The problem starting may suggest a faulty starter solenoid....
Trouble starting the car.
It sounds like you may have a faulty starter solenoid. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter. When this fails, it may cause a clicking sound and will...
My 2005 Dodge Ram 1500 5.7 he I lost power while I was driving. It will turn over buybacks seems like it’s not getting fuel. If I
Hi Terry. Thanks for sending in your question today. It's likely that your fuel pump is damaged or perhaps the fuel relay. A dirty fuel filter, combined with dirty air filters, fuel injectors, and other fuel system components can also...

Related articles

P0502 OBD-II Trouble Code: Vehicle Speed Sensor Low Input
Vehicle Speed Sensor Low Input What the P0502 code means The P0502 trouble code means that the Engine Control Module (ECM) has...
P2069 OBD-II Trouble Code: Fuel Level Sensor B Circuit Intermittent
P2069 P2069 code definition Fuel Level Sensor B Circuit Intermittent What the P2069 code means P2069 is an OBD-II generic code for the engine control module (ECM) detecting the fuel level sensor B signal is intermittent. The sensor output voltage...
P0491 OBD-II Trouble Code: Secondary Air Injection System Insufficient Flow Bank 1
P0491 code means there is a problem on the side of the engine which contains cylinder #1 due to a bad air inlet, faulty wires, relay, pump, or fuse.