Question about 1999 Jeep Wrangler

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I have a 1999 Jeep Wrangler 2.5L. I just replaced the TPS about 2 months ago. A few days ago, it started idling really high again. This was after it sat in the driveway in the rain.I took it to AutoZone. It was displaying a code P0120. ("TPS needs to be replaced" code). I drove it home and it seemed to be doing better. Today I tried to drive it, and it seemed to be choking and the dash gauges started going nuts then quit working. What is the world could it be?

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  • Contributor
  • 17 Answers

Unhook the battery for ten minutes then drive it for a few hours it should reset the pcm.

Posted on Nov 04, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 1999 jeep wrangler dash gauges not working

likely connection behind dash. Easy fix - remove dash, twist cannectors behind dash and put back together. All gauges will e working again. 10-15 mins tops

Posted on Jun 19, 2011

Mike258
  • 1498 Answers

SOURCE: 1991 Jeep Fuel Control Issue

Hey Mudkicker,

Who ever thought of putting an electric fuel pump inside a tank of gas........

Check your other gauges for accuracy. They do that when a ground is loose.

Check the wiring from the fuel tank along the longitudinal frame for frays and shorts. Plugs are secured.

Under the hood, passenger side, check the fuel pump relay. Switch it with one of the others to test it.

Bring the vehicle to an auto parts store. Ask them to break out he code reader. Check for diag codes

Comment me back
Mike.

Posted on Aug 26, 2009

rogrrabbit
  • 986 Answers

SOURCE: i have a 2004 jeep wrangler that is throwing a

did you rest the code after replaceing the snsor?

Posted on Jun 20, 2009

  • 321 Answers

SOURCE: 1999 wrangler problem: high idle,and hesitant.

If it was originally scanned by auto zone and they said Throttle Position Sensor (TPS),i would go back and have it scanned again,this will tell you for certain what it is.Try and get the code number and definition written down.If it were TPS again,the sensor itself would need to be replaced unless the cost was prohibitive,or the wires to and from the sensor and PCM (vehicle computer),ohms checked for continuity first.Eliminating the wires leaves 2 entities in the circuit,the PCM or the TPS.Checking circuits is costly in labor dollars.Good luck.

Posted on Jul 10, 2008

  • 7 Answers

SOURCE: 1999 jeep grand cherokee / 4.0 L.

I had a skim module go out in mine in the ignition, and I have a 2001. It's a 100 part, and now it starts fine.

Posted on Sep 10, 2008

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1999 wrangler problem: high idle,and hesitant.


If it was originally scanned by auto zone and they said Throttle Position Sensor (TPS),i would go back and have it scanned again,this will tell you for certain what it is.Try and get the code number and definition written down.If it were TPS again,the sensor itself would need to be replaced unless the cost was prohibitive,or the wires to and from the sensor and PCM (vehicle computer),ohms checked for continuity first.Eliminating the wires leaves 2 entities in the circuit,the PCM or the TPS.Checking circuits is costly in labor dollars.Good luck.

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