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2003 jeep wrangler trouble codes - 2003 Jeep Wrangler

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: the p 1294 code came up on my 2003 jeep wrangler

it is either the iac or a vaccum leak p1294 means engine target idle not reached.

Posted on Sep 27, 2009

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SOURCE: trouble code 12 on 92 jeep wrangler

code 12 - coolant sensor voltage to low

Posted on Dec 08, 2009

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SOURCE: The check engine light has come on in a 2003 jeep

a p0303 is a cylinder number 3 misfire, which means that the computer is reading that the number three cylinder of the engine isn't contributing as much power as the others. usually is just a tune-up issue, i would suggest checking or replacing tune-up components. that will usually handle it.

Posted on Dec 10, 2009

  • 61 Answers

SOURCE: 1991 jeep wrangler trouble starting and stalling

It could be a fuel filter clogged up or it could be a fuel pump going bad. Does the jeep start back up after it stalls? Is there any more symptoms?

Posted on Jan 30, 2010

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SOURCE: 2003 jeep wrangler trouble codes p0123, p0121, and

A code P0123 may mean that one or more of the following has happened:

  • TPS not mounted securely
  • TPS circuit short to ground or another wire
  • Faulty TPS
  • Damaged computer (PCM)
Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, carefully inspect all wiring and connectors that lead to the TPS. More than likely the problem is with the TPS wiring. Check the voltage at the TPS (refer to a service manual for your vehicle for this specific information). If the voltage spikes or is too high (over 4.65 volts with key on, engine off), then that is indicative of a problem. Carefully trace each wire from the TPS wiring harness to check for breaks, rubbing against other components, etc.
A code P0121 may mean that one or more of the following has happened:
  • TPS has intermittent open or short internally
  • Harness is rubbing and causing an open or short in the wiring
  • Bad connection at the TPS
  • Bad PCM (less likely)
  • Water or corrosion in connector or sensor
Possible Solutions 1. If you have access to a scan tool, see what the idle and WOT (wide open throttle) readings are for the TPS. Check if they're close to the specifications mentioned above. If not, then replace the TPS and re-check.
2. Check for an intermittent open or short in the TPS signal. To do that, you can't use a scan tool. You'll need an oscilliscope. The reason is because scan tools take samplings of many different readings over just one or two data lines and can miss an intermittent drop out. Hook up your oscilliscope and watch the signal. It should sweep up and down smoothly with no drop outs or spikes.
3. If no problems were noticed, perform a wiggle test. Do this by wiggling the connector and harness while watching the pattern. Does it drop out? If so, replace TPS and re-check.
4. If you have no TPS signal, check for 5 Volt reference at the connector. If it's present, check the ground circuit for open or shorts.
5. Make sure the signal circuit isn't 12V. It should never have battery voltage. If it does, trace circuit for short to voltage and repair.
6. Look for any water in the connector and replace TPS as necessary.
P0152 Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 1)

Posted on Feb 16, 2010

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All you hav to do is disconnect the battery. Some say to wait ten minutes but in my experience the codes woll clear after a momentary disvomect.

Jun 12, 2014 | 2003 Jeep Wrangler

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P0123, p0155, p0306

Well it really doesn't matter much. I would probably clear the codes and see which ones come back first.
Code 123 is for the throttle position sensor signal being out of range. Could be the sensor or a wiring problem.
Code 155 is for a problem with the heater circuit going to O2 sensor bank 2 sensor 1. Thats on the side with cylinder two if you have a V6 engine. Could be the sensor but its usually the lack of power for the heater.
Code 306 is for loss of power from cylinder 6 which could be mechanical, fuel, or spark related.
The three codes are not connected to each other. And trouble codes are not a statement to replace parts, only what to test.

Feb 26, 2014 | 2003 Jeep Wrangler

2 Answers

Free_Online_Manuals2003 jeep wrangler


Oct 23, 2011 | 2003 Jeep Wrangler

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I have a 2003 jeep wrangler that will not start and is displaying code P0465.....I have replaced the starter 3 times in the past 6 months...What is this error code?

p0465 = Purge flow sensor circuit malfunction. It has nothing to do with the starter, and diagnosing this code can be very challenging without the proper tools.

Sep 13, 2010 | 2003 Jeep Wrangler

1 Answer

The jeep is reving high once the clutch is in or in neutral. If you step on the gas it revs high and comes back down both in drivingthe engine light is on as well

The engine light indicates that there is a Diagnostic Trouble Code (DTC) available for download from the vehicle computer. Go to your local Auto Zone or O'Reiley's (SP?). They can download the code and tell you whats involved and its FREE!

Jun 22, 2010 | 2003 Jeep Wrangler

1 Answer

Most common problen jeep wrangler 2003 2.4 l engine light on

There are hundreds of things that can trip the check engine light, some so simple as a loose gas cap. Your best bet is to get your jeep scanned for free at a local auto parts store, such as autozone. Usually they will scan your code, and tell you what the most likely cause of the code is. Then you can make a good decision as to what needs fixed!

May 08, 2010 | 2003 Jeep Wrangler

1 Answer

The p 1294 code came up on my 2003 jeep wrangler rubicon. How do i fix this problem.

it is either the iac or a vaccum leak p1294 means engine target idle not reached.

Sep 22, 2009 | 2003 Jeep Wrangler

2 Answers

Pcm trouble codes.

You can either use a auto scan tool to clear the code's, or you can unplug the battery negative cable, if you have a anti-theft system you may have problem's after disconnecting the battery?

Apr 21, 2009 | 2003 Jeep Wrangler

1 Answer

Pcm trouble codes? How do you get them to clear?

you can usually take to neares advance auto or autozone and ask them to clear check engine light and presto code gone

Apr 21, 2009 | Jeep Wrangler Cars & Trucks

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