Evap and other issues
#1
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Year: 1999
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Evap and other issues
Been having issues with my 99 Cherokee lately
I'm throwing p0443 and p1685. My gas mileage is a steady 16. Mpg when it used to be 18 about. I also have to cycle the key twice to start it. Runs fine minus the bad gas mileage. Also I can pull the key out while it's running
I'm throwing p0443 and p1685. My gas mileage is a steady 16. Mpg when it used to be 18 about. I also have to cycle the key twice to start it. Runs fine minus the bad gas mileage. Also I can pull the key out while it's running
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Year: 1996
Model: Cherokee
Engine: 4.0
I might help but I don't carry my trouble code decoder charts around with me. And don't feel like googling a problem not involving my rig. What issues do those codes refer to.
The key thing is a bad lock cylinder.
The key thing is a bad lock cylinder.
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NEVER disconnect the battery to clear codes.. That just HIDES the issue, by resetting the computer into learn mode. Chances are the codes will come back sometime in the next 50 start/run cycles.
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Year: 1999
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Engine: 4.0
Been having issues with my 99 Cherokee lately
I'm throwing p0443 and p1685. My gas mileage is a steady 16. Mpg when it used to be 18 about. I also have to cycle the key twice to start it. Runs fine minus the bad gas mileage. Also I can pull the key out while it's running
I'm throwing p0443 and p1685. My gas mileage is a steady 16. Mpg when it used to be 18 about. I also have to cycle the key twice to start it. Runs fine minus the bad gas mileage. Also I can pull the key out while it's running
Here's some diagnostic data pertaing to 1685: The fact that you're having ignition key issues it may be related to 1685. Fix the ignition key issue and I'm sure it will clear this code.
P-1685 INVALID SKIM KEY
Set Condition: The PCM does not receive a valid key message from the SKIM.
Possible Causes:
INCORRECT VIN IN PCM
INVALID SKIM KEY NOT PRESENT
NO COMMUNICATION WITH SKIM
NO VIN PROGRAMMED IN THE PCM
PCM
SKIM TROUBLE CODES SET
Concerning the P0443 code, here's some diagnostic data:
P0443-EVAP PURGE SOLENOID CIRCUIT
Possible Causes:
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
EVAP PURGE SOLENOID CONTROL CIRCUIT OPEN
EVAP PURGE SOLENOID CONTROL CIRCUIT SHORTED TO GROUND
WIRING HARNESS INTERMITTENT
EVAP PURGE SOLENOID
POWERTRAIN CONTROL MODULE
The EVAP Purge Solenoid is that gizzy mounted on the firewall that clicks. If it no longer clicks after the coolant temp gets up to around 150*F the control fuse in the JB may be blown. If the fuse is okay the solenoid assembly may be defective.
The fuse is #10 in the JB.
#7
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With code P1685 I take it you have the Sentry Key Immobilzer System. Here's some diagnostic data pertaing to 1685: The fact that you're having ignition key issues it may be related to 1685. Fix the ignition key issue and I'm sure it will clear this code. P-1685 INVALID SKIM KEY Set Condition: The PCM does not receive a valid key message from the SKIM. Possible Causes: INCORRECT VIN IN PCM INVALID SKIM KEY NOT PRESENT NO COMMUNICATION WITH SKIM NO VIN PROGRAMMED IN THE PCM PCM SKIM TROUBLE CODES SET Concerning the P0443 code, here's some diagnostic data: P0443-EVAP PURGE SOLENOID CIRCUIT Possible Causes: FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN EVAP PURGE SOLENOID CONTROL CIRCUIT OPEN EVAP PURGE SOLENOID CONTROL CIRCUIT SHORTED TO GROUND WIRING HARNESS INTERMITTENT EVAP PURGE SOLENOID POWERTRAIN CONTROL MODULE The EVAP Purge Solenoid is that gizzy mounted on the firewall that clicks. If it no longer clicks after the coolant temp gets up to around 150*F the control fuse in the JB may be blown. If the fuse is okay the solenoid assembly may be defective. The fuse is #10 in the JB.
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#9
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#10
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See if the solenoid is clicking after the coolant temp gets above 150*F. If it is, something else is wrong
If it isn't clicking check the electrical connector for corrosion.
The solenoid connector has two pins. The White wire is power from the F10 fuse in the JB, the other pin is a Pink/Black tracer wire which is the ground driver from the PCM.
You can use a voltmeter to see if 12 volts is getting to the connector and a test lamp to see if the ground driver is working. The ground should be pulsing. If you connect the test lamp to the Pink/Black wire pin cavity and provide the test lamp with 12 volts, you should see the test lamp flicker. Use an LED test lamp.
If all is okay, replace the EVAP Purge Solenoid Assembly.
FYI, I had to replace mine several years ago because of the same code.
If it isn't clicking check the electrical connector for corrosion.
The solenoid connector has two pins. The White wire is power from the F10 fuse in the JB, the other pin is a Pink/Black tracer wire which is the ground driver from the PCM.
You can use a voltmeter to see if 12 volts is getting to the connector and a test lamp to see if the ground driver is working. The ground should be pulsing. If you connect the test lamp to the Pink/Black wire pin cavity and provide the test lamp with 12 volts, you should see the test lamp flicker. Use an LED test lamp.
If all is okay, replace the EVAP Purge Solenoid Assembly.
FYI, I had to replace mine several years ago because of the same code.
#11
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See if the solenoid is clicking after the coolant temp gets above 150*F. If it is, something else is wrong If it isn't clicking check the electrical connector for corrosion. The solenoid connector has two pins. The White wire is power from the F10 fuse in the JB, the other pin is a Pink/Black tracer wire which is the ground driver from the PCM. You can use a voltmeter to see if 12 volts is getting to the connector and a test lamp to see if the ground driver is working. The ground should be pulsing. If you connect the test lamp to the Pink/Black wire pin cavity and provide the test lamp with 12 volts, you should see the test lamp flicker. Use an LED test lamp. If all is okay, replace the EVAP Purge Solenoid Assembly. FYI, I had to replace mine several years ago because of the same code.
#12
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The OEM part number is 4669475AB.
Rockauto has them.
http://www.rockauto.com/catalog/raframecatalog.php
Judging by the manufacturers shown you can probably get them at Advance or O'reilly auto parts as well.
Rockauto has them.
http://www.rockauto.com/catalog/raframecatalog.php
Judging by the manufacturers shown you can probably get them at Advance or O'reilly auto parts as well.
#13
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The OEM part number is 4669475AB. Rockauto has them. http://www.rockauto.com/catalog/raframecatalog.php Judging by the manufacturers shown you can probably get them at Advance or O'reilly auto parts as well.
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I just want to thank you personally for all of the help that you provide to us Cherokee owners. I have been building Bronco's, Scouts, CJ's and TJ's since the early 80's. I'm now 62 years old with 6 herniated discs and fingers that look like capital " C's". I got my first Cherokee a few years ago because wheelin is still in my blood and I needed a smoother ride and love my XJ. The forum has been very helpful to me with ideas and repairs. You and some others are most helpful all of the time. It really gets to me when members have to be rude and treat you like a dummy or insult you for asking a question. I utilize the search but there are times when my results to not address the exact specifics of my problem and the search results are generic to my problem. I am very hesitant to " Ask a question" and being reprimanded or having my intelligence questioned, or being crucified publicly. Everything but the help I need at the time. There are a number of solid members like yourself who want to help and share information. Then there is another group whose only design seems to be to bash, be arrogant or disrespectful. I wish I could thank all of the members like yourself, however you always seem to come up with solid helpful information, so I guess to me, you are the most gracious with your time and consideration and to that, I say Thank you!!!
Jplug2007
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Last edited by jplug2007; 07-20-2017 at 08:54 AM. Reason: spelling
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I just want to thank you personally for all of the help that you provide to us Cherokee owners.You are the most gracious with your time and consideration and to that, I say Thank you!!! Please see my other post CCKen
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