98 Wrangler 4.0 P0123 - TPS/Pedal Position Sensor HELP - Jeep Wrangler Forum

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Old 06-21-2011, 05:54 PM   #1
Join Date: Jun 2011
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98 Wrangler 4.0 P0123 - TPS/Pedal Position Sensor HELP

First time to the forum. Thanks in advance for your responses. I've got a 98 Jeep Wrangler Sahara, 2 weeks ago we had a surprise rain one night and I had the top off. Unfortunately I still had the plugs in the floor boards from the winter. Needles to say there was about 3 inches of water in the Jeep when I woke up the next morning. Later the day following the rain the horn went off by its self while parked in my driveway. I had to pop the hood and manually disconnect the horns. I since than reconnected the horns and no problems. I than tried to start the Jeep and it immediately had a CE light and it sputters and misfires. I put a Actron scanner on it and it sent back a "P0123 code - TPS/Pedal position Sensor A ckt High Input".

Now the TPS sensor sits under the hood....Could water in the jeep have shorted out this sensor somehow? Or is there possibly another culprit I should be looking at? Should I just replace the sensor and go from there?




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Old 06-21-2011, 05:58 PM   #2
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Is the Jeep completely dry now? Try disconnecting the battery and leave it like that overnight. This will reset the computer. Maybe that will do the trick.

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Old 06-21-2011, 07:13 PM   #4
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I'll give the battery trick a try tonight! Thanks. I'll keep you posted on if it works or not. Thanks again!!!
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Old 06-21-2011, 07:14 PM   #5
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kjeeper10 - Do you mean applying WD-40 directly to the TPS sensor?
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Old 06-21-2011, 08:20 PM   #6
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Originally Posted by Pstull
kjeeper10 - Do you mean applying WD-40 directly to the TPS sensor?
Yes. It is totally safe

Just not sure how the tps works as far as getting in there. I've used on other electrical shorts before.
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Old 06-21-2011, 10:08 PM   #7
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Yeah you can unplug the harness from the TPS, and shoot a little WD in the plug and socket. Won't hurt at all.

I'd be more inclined to think it was an electrical gremlin from the jeep getting soaked and probably not a TPS problem. Do as banipal said and disconnect the power to the ECM.

To save the memory in your stereo, just pull the plugs off the ECM itself, sits right behind the battery. Will clear the memory, and you won't have to reset your radio stations.

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God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.
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98 jeep wrangler , a ckt high input , p0123 , pedal position sensor , tps sensor

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