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Check engine light help!!

Discussion in 'Cherokee' started by Parkerd84, Oct 14, 2016.

  1. Oct 14, 2016 at 3:00 PM
    #1
    Parkerd84

    #1
    Parkerd84 [OP] New Member

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    Ok so I've done plenty of research but still can't seem to fix this issue...

    96 jeep Cherokee 4.0 with 160xxx miles. Engineis throwing a P0443 code. So I've replaced the evap solinoid and verified that it works by using a jumper to activate it. All of my research led me to the ecu not switching the ground and needing to be replaced....

    Before dropping in a new ecu I took it to a shop to verify my diagnoses, which they did.

    Got a new ecu and still same code.

    I'm getting 5v on the power side to the valve. I checked and have continuity on the ground cable between the valve and the ecu plug.

    I am totally stumped and I need help!!!!
     
    Parkerd84, Oct 14, 2016
    #1
  2. Oct 15, 2016 at 4:21 PM
    #2
    chris4x4

    #2
    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    Welcome to the site! Wish I could help, but maybe someone else can pop in
     
    chris4x4, Oct 15, 2016
    #2
  3. Oct 16, 2016 at 6:52 PM
    #3
    C2T

    #3
    C2T Well-Known Member

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    Richard
    Helena, Montana
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    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,
    P0443 EVAP Purge Solenoid Circuit Malfunction
    Possible Causes

    * Purge solenoid connector is damaged
    * Purge solenoid control circuit is open or shorted to ground
    * Purge solenoid control circuit is shorted to voltage
    * Purge solenoid has failed

    Check for a power source, 12.0 volts to purge solenoid. If there is no power to the purge solenoid, check the condition of fuse number 10 in the under dash fuse block.

    You could also try to unplug the PCM and try manually grounding each solenoid to verify they do operate.
     
    C2T, Oct 16, 2016
    #3
  4. Oct 16, 2016 at 8:09 PM
    #4
    C2T

    #4
    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    763
    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,
    And welcome to the site!
     
    C2T, Oct 16, 2016
    #4
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