Jeep has a reading of Manifold Absolute Pressure senor Voltage High

Asked by Sep 22, 2016 at 07:44 PM about the 1998 Jeep Cherokee 4 Dr Limited 4WD

Question type: Maintenance & Repair

9 Answers


Check the connections to it and all vacuum lines to and around the engine.

2 of 2 people found this helpful.

Listen for vacuum leaks (hiss).

2 of 2 people found this helpful.

The higher the engine vacuum, the lower the voltage reading.

2 of 2 people found this helpful.

Here Below is a url copy & paste it to new browser window its a trouble shooter test for MAP sensor

2 of 2 people found this helpful.

2 of 2 people found this helpful.

Here is another url for it if its the 2.5

1 of 1 people found this helpful.

2 of 2 people found this helpful.

I have a 1998 Jeep Grand Cherokee Limited 5.2 it only stays running for 10 to 15 minutes now!! Broke down when I drove it all the way to Ky. from NC It had been cutting off while driving and would restart when motor cools down!!! It has became changed disturber cap also button, plugs and wires!!! Put in new fuel pump and filter.....Still shutting off when motor heats up!!! Will be checking all the above replies....Thank you for your help.... I'll be sure to let you know if it helped!!!


Now that I have some more information the distributor has a module pick up that can cause these symptoms, It is located below the rotor button and is a small item. Some distributors have to come out to replace it but others do not. It may have a different name but any good sales person at good auto parts store will know it by the "pick up". I had a bad pick up once and those symptoms you state happened to me, I used my snap-on brick and I could not find it with the computer. I changed it out just to rule it out and to my delight it never did it again. Mine just died after warm and after about 30 minutes it would go again for 15-20 minutes and die, I always made it home but took a long time.

2 of 2 people found this helpful.

Your Answer


Looking for a Used Cherokee in your area?

CarGurus has 41,341 nationwide Cherokee listings starting at $1,500.


Jeep Cherokee Experts

  • #1
    Daniel Guillen-Pizzorni
  • #2
  • #3
View All

Related Models For Sale

Used Jeep Grand Cherokee
898 Great Deals out of 71,353 listings starting at $992
Used Jeep Wrangler
291 Great Deals out of 15,969 listings starting at $2,997
Used Toyota 4Runner
263 Great Deals out of 21,666 listings starting at $2,300
Used Ford Explorer
798 Great Deals out of 62,687 listings starting at $999
Used Honda CR-V
852 Great Deals out of 54,165 listings starting at $1,500
Used Toyota RAV4
901 Great Deals out of 58,804 listings starting at $1,690
Used Ford F-150
2,170 Great Deals out of 181,253 listings starting at $1,000

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.