1. Welcome to Jeeps.net!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Jeep discussion topics
    • Communicate privately with other Jeep owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

P0705 code

Discussion in 'Cherokee' started by motoman122, Sep 4, 2016.

  1. Sep 4, 2016 at 1:33 PM
    #1
    motoman122

    motoman122 [OP] Member

    Joined:
    Sep 2, 2016
    Member:
    #158
    Messages:
    11
    Gender:
    Male
    First Name:
    Thomas
    Vehicle:
    1998 Cherokee Classic
    none
    Okay, I had a P0300 code and posted it on this thread:

    https://www.jeeps.net/threads/p0300-code-on-a-1998-cherokee-classic-with-a-4-0-i6.151/

    I replaced the distributor cap, the rotor and the throttle positioning sensor, and the truck is still running as rough as it was, but the P0300 code is gone now.

    NOW, I have a P0705 code that according to google and a couple of Jeep forums should be a transmission range sensor circuit malfunction or the neutral safety switch. I'm not sure how either one of these could be causing the truck to run like 2 cylinders aren't firing and smells like I have an exhaust manifold leak ( and I know the exhaust gasket was replaced less than 4,000 miles ago and didn't have this smell before the issue started ), but that's what I have now.

    Any suggestions or experiences with this guys and / or gals?
     
  2. Sep 4, 2016 at 5:30 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

    Joined:
    Jul 19, 2016
    Member:
    #2
    Messages:
    2,685
    Gender:
    Male
    Wow! Subbed to find out (wish I could help)
     
  3. Sep 5, 2016 at 6:44 AM
    #3
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    759
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
  4. Sep 7, 2016 at 8:36 AM
    #4
    motoman122

    motoman122 [OP] Member

    Joined:
    Sep 2, 2016
    Member:
    #158
    Messages:
    11
    Gender:
    Male
    First Name:
    Thomas
    Vehicle:
    1998 Cherokee Classic
    none
    @C2T, could this cause it to run like 2 plug wires were disconnected at an idle? I would think, by what I'm reading, it would only occur while driving.
     
  5. Sep 7, 2016 at 4:46 PM
    #5
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    759
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    I must apologize. I posted previously for a P0700. Apparently, I cannot read as you stated your issue is now a P0705.

    http://repairpal.com/OBD-II-Code-P0705

    It still seems to indicate it could cause misfiring. I don't understand how...but that is what they say.

    Common causes....
    • Defective Transmission Range Sensor (PRNDL input)
    • Defective Transmission Range Sensor (PRNDL input) wiring or connector
     
  6. Sep 8, 2016 at 10:59 AM
    #6
    motoman122

    motoman122 [OP] Member

    Joined:
    Sep 2, 2016
    Member:
    #158
    Messages:
    11
    Gender:
    Male
    First Name:
    Thomas
    Vehicle:
    1998 Cherokee Classic
    none
    LOL, no problem. They both seem to be related anyway. Everything says transmission, yet the transmission works just fine. I even saw on one thread where the Neutral Safety Switch could cause the problem, but everything associated with the NSS seems to be working just fine too. It starts in park and neutral and the back up lights illuminate too.

    This thing is also throwing a P0138 code. This, according to everything I have seen, P0138 has to do with bad O2 sensors, but at the end of one thread I saw, it said to "check the fuse in the fuse block next to the battery before you do ANYTHING". Apparently they went through the whole O2 sensor nightmare and it was a stinking blown 15 amp fuse causing the issue. Below is the link to the P0138 thread.

    http://www.cherokeeforum.com/f2/jeep-cherokee-engine-code-p0138-71248/

    I get the notion it is throwing the tranny codes because the engine isn't running good enough to build the normal pressures for the tranny. Does that make sense to you?

    Thanks for all your help!
     
    Last edited: Sep 8, 2016
  7. Sep 8, 2016 at 12:47 PM
    #7
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    759
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    Yes...it does make sense. With these computers, everything is interconnected and dependent upon another sub-system. So anything is possible.
     
  8. Sep 8, 2016 at 12:57 PM
    #8
    motoman122

    motoman122 [OP] Member

    Joined:
    Sep 2, 2016
    Member:
    #158
    Messages:
    11
    Gender:
    Male
    First Name:
    Thomas
    Vehicle:
    1998 Cherokee Classic
    none
    Yeah...I think before I do ANYTHING else, I'm going to check the fuse box from one end to the other for burnt fuses.

    This just happened suddenly too. It was running fine one second and spitting and sputtering the next, so realistically the fuse makes more sense than ever now.

    I sure miss the good old days when vehicles weren't so darned complicated. :frusty:

    Thanks for all the help!!
     
  9. Sep 8, 2016 at 6:10 PM
    #9
    motoman122

    motoman122 [OP] Member

    Joined:
    Sep 2, 2016
    Member:
    #158
    Messages:
    11
    Gender:
    Male
    First Name:
    Thomas
    Vehicle:
    1998 Cherokee Classic
    none
    Well, unfortunately the fuse wan't the issue. I should have known my luck isn't that good. LOL

    When we started it up tonight after checking the fuses, it almost acted like it was about to run out of fuel, as if the fuel pump wasn't getting enough fuel to it, so I'm going to change the fuel filter like the guy in the video link you posted said to do. That is a cheap fix if that fixes it and if it doesn't, it's something that needed to be done anyway.
     
  10. Sep 8, 2016 at 7:20 PM
    #10
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    759
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    I will cross my fingers for ya.
     
  11. Sep 9, 2016 at 10:25 AM
    #11
    motoman122

    motoman122 [OP] Member

    Joined:
    Sep 2, 2016
    Member:
    #158
    Messages:
    11
    Gender:
    Male
    First Name:
    Thomas
    Vehicle:
    1998 Cherokee Classic
    none
    Thanks for all your help C2T, it is definitely helpful to have knowledgeable people to bounce ideas off of. This is my 1st experience with Jeeps and I'm finding 1 thing can be MANY.

    I was also wondering about the wiring in the injectors and possibly the fuel pressure. If an injector isn't getting the signal to squirt, due to a worn and shorting out wire, it could cause the original P0300 ( multiple cylinder misfire ), which could cause the rest of them. Same if there isn't enough fuel pressure.

    Any Idea what the fuel pressure should be on the 4.0?
     
  12. Sep 9, 2016 at 10:40 AM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

    Joined:
    Jul 19, 2016
    Member:
    #2
    Messages:
    2,685
    Gender:
    Male
    Everything I have found, lists fuel pressure to be around 45 psi
     
  13. Sep 9, 2016 at 10:50 AM
    #13
    motoman122

    motoman122 [OP] Member

    Joined:
    Sep 2, 2016
    Member:
    #158
    Messages:
    11
    Gender:
    Male
    First Name:
    Thomas
    Vehicle:
    1998 Cherokee Classic
    none

    AWESOME! Thank you very much! That will save me much digging!!
     
  14. Sep 9, 2016 at 11:24 AM
    #14
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    759
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    I have seen fuel pressure to be an issue on more than one. However, also remember, a low pressure does not automatically indicate fuel pump. It can, as you know, be a filter or it can be the fuel rail pressure regulator at the front of your fuel rail.

    And the thing with a 0300 is it has to be more than one cylinder misfiring for that to happen. Heck, even a bad o2 sensor can cause it.

    Wish it was easier....
     
  15. Sep 9, 2016 at 11:28 AM
    #15
    motoman122

    motoman122 [OP] Member

    Joined:
    Sep 2, 2016
    Member:
    #158
    Messages:
    11
    Gender:
    Male
    First Name:
    Thomas
    Vehicle:
    1998 Cherokee Classic
    none

    You and me both!! On a nearly 20 year old Jeep it could be pretty much anything.
     
To Top