throwing codes need HELP. - JeepForum.com

 
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post #1 of 9 Old 10-22-2008, 03:20 PM Thread Starter
shay737
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throwing codes need HELP.

i was sitting in the car wash today and all the sudden my check engine light came on and my jeep started idling at about 1400 rpms. i took it over to autozone to have the obd read and it came out with 5 codes, here they are

P0123
tps/pedal position
sensor a
circuit high input


p0301
cylinder 1
misfire detected

p0700
trans control sys
malfunction

p0463
fuel level sensor a
circuit hight input

p0122
tps/pedal position
sensor a
circuit low input.



will changing out my TPS take care of all of this. i need help so any ideas would be greatly appreciated.

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post #2 of 9 Old 10-22-2008, 03:26 PM
blue96jeep
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well if that happened to me i would change the tps and have the codes cleared if thay come back then they have to be addressed also, but then again codes only get thrown if a sensor is bad or going bad.

ryan
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post #3 of 9 Old 10-22-2008, 04:45 PM
tjwalker
It's the crank sensor!
 
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I think the curious thing is that these codes set WHEN you were in the car wash. Most car washes aren't powerful or snaky enough to sling water on the TPS so not sure what is happening; it may be simply a coincidence. First thing I would do would be to disconnect the battery for 20 minutes or so, then start and drive the vehicle and see if the CEL comes back. If it doesn't, great. If it does, I would test the TPS, it's pretty easy to do. Use the SEARCH function for more information

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post #4 of 9 Old 10-22-2008, 04:52 PM Thread Starter
shay737
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well after i got the codes read and started driving it home i noticed it was running with weird rpms and seemed to not be changing gears at the right times. thanks for any advice. i also need directions on how to change the tps if it is something i can do myself.
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post #5 of 9 Old 10-22-2008, 05:34 PM
tjwalker
It's the crank sensor!
 
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The TPS is very easy to change out; couple of torx screws if I remember correctly. Located on the throttle body along with the IAC. I'd try the battery thing first and if that doesn't work, test the parts. Throwing parts at a problem is not necessarily a very efficient way of fixing problems.

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Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
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post #6 of 9 Old 10-22-2008, 07:20 PM Thread Starter
shay737
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how do you test the tps.
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post #7 of 9 Old 02-02-2009, 12:54 PM
lazermule
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Quote:
Originally Posted by shay737 View Post
well after i got the codes read and started driving it home i noticed it was running with weird rpms and seemed to not be changing gears at the right times. thanks for any advice. i also need directions on how to change the tps if it is something i can do myself.
My 2001 XJ does exactly the same thing after a car wash. It doesn't happen every time and it doesn't happen in the rain. Mine bucks like a misfire combined with a tranny error (auto) and stays in 3rd gear if there is even a moderate throttle angle.

After it dries out, all is good.

Any ideas???

LM
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post #8 of 9 Old 02-02-2009, 03:47 PM
CJ7-Tim
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Quote:
Originally Posted by lazermule View Post
My 2001 XJ does exactly the same thing after a car wash......... After it dries out, all is good. Any ideas???
A loose connector is probably getting water inside and shorting somewhere. Get a tube of dielectric grease and a can of electrical contact cleaner at the parts store. Disconnect and clean the wire plug connectors at the engine computer and at the throttle body, clean the connectors and then apply a tiny bit of the special grease to the connector and plug it back together. If the cleaning doesn't help, find, remove, clean and firmly re-attach all the ground wire to body connections for the battery and engine.

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post #9 of 9 Old 02-08-2013, 07:15 PM
FullMoonMadness
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Thank you for this post, it helped me resolve my issue. My jeep was revving very high once it reached 20 MPH, but wouldn't change to the next gear. It turned out to be the throttle position sensor. $42 at Auto Zone, and the issue was resolved in the 15 minutes it took to replace.
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