Question about 2003 Jeep Wrangler

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Pcm trouble codes.

I have a 2003 jeep wrangler. How do you get the trouble codes to clear after changing a malfunctioning sensor?

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  • sparkysus Apr 21, 2009

    I have tried to un hook negative terminal on vehicles in the past. I found that it normaly only clears the computer "short term" memory and the trouble code soon returns.

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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?

Posted on Apr 21, 2009

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1 Answer

Show me a picture of the ignition control on a 2003 grand cherokee please


close your eyes. picture a pcm. now picture a ckp(crank sensor) at the bellhousing. now picture a u-tube video about howto test a crank sensor, jeep grand cherokee. now picture a "fluke" test meter or equivalent. or picture a towtruck taking it to the jeep dealer to get your pcm out of sleep mode by a drbIII scantool and run the tests to diagnose

Apr 27, 2014 | 1995 Jeep Wrangler

1 Answer

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

1 Answer

My 03 wrangler will not rev past 3,500 rpm


Do you have a trouble code for the throttle position sensor ?
If you have normal fuel pressure, the TPS would be the next thing to check. Problem could be in the harness between the sensor and the computer too.

Jul 20, 2012 | 2003 Jeep Wrangler

1 Answer

My 99 Jeep Wrangler failed inspection for a P0650 mil malfunction. Is this a wiring problem or a bad bulb/fuse?


DTC P0650 represents an issue with the actual check engine light (malfunction indicator lamp). Ignition voltage is supplied directly to the malfunction indicator lamp (MIL). The powertrain control module (PCM) controls the lamp by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the component being controlled. The driver has a fault line which is monitored by the PCM. When the PCM is commanding a component ON, the voltage of the control circuit should be low, near 0 volts. When the PCM is commanding the component control circuit OFF, the voltage potential of the circuit should be high, near battery voltage. If the fault detection circuit senses a voltage other than what is expected, the fault line status will change causing the diagnostic trouble code (DTC) to set.

A DTC P0650 indicates a problem with the circuit to the actual check engine light itself. If the fault is current, check if the check engine (service engine soon) lamp comes on when you turn the ignition on, If not, we will need to pull the engine control computer and ground the wire that goes to the light. If the light comes on, it is a failed pcm which must be replaced and reprogrammed. If not, it is either the circuit to the cluster or the cluster itself.

Good luck.

Mar 26, 2011 | Jeep Wrangler Cars & Trucks

1 Answer

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

2 Answers

I have a diagnostic code 340 and 320 on a 1997 Jeep Cherokee. What might the problem be?


DTC P0340 - Camshaft Position Sensor Circuit Malfunction
Symptoms can include:
  • Hard starting or no start
  • Rough running / misfiring
  • Loss of engine power
Causes:A code P0340 could mean one or more of the following has happened:
  • a wire or connector in the circuit could be grounded/shorted/broken
  • the camshaft position sensor may have failed
  • the PCM may have failed
  • there exists an open circuit
  • the crankshaft position sensor may have failed

Possible Solutions:With a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Visually inspect all the wiring and connectors in the circuit
  • Check for continuity in the circuit wiring
  • Check the operation (voltage) of the camshaft position sensor
  • Replace the camshaft position sensor as required
  • Check the crankshaft position circuit as well
  • Replace circuit wiring and/or connectors as required
  • Diagnose/replace the PCM as required

DTC P0320 also have with this wrong.

Jul 13, 2010 | 1997 Jeep Grand Cherokee

1 Answer

P0057


A p0057 code is related to the heater circuit voltage for the bank 2 sensor 2 Oxygen sensor. The PCM (computer) controls a heating element inside the O2 sensor that helps the sensor reach a high temp in order for the O2 to start working faster. It seems this circuit is not working, therefor the PCM alerts us by displaying a trouble code. In most cases, replacing the O2 repairs this code.

May 04, 2010 | 2005 Jeep Wrangler

1 Answer

PO725 Engine speed sensor circuit malfunction


Trouble Code: P0725


A/T Engine Speed Sensor Circuit Malfunction

Possible Causes:


Check for trouble codes related to the CKP Sensor

CKP Sensor signal circuit open, shorted to ground or to power

CKP Sensor is damaged or has failed (open or shorted)

Intermittent wiring or connector problems

PCM has failed

May 24, 2009 | 2002 Jeep Grand Cherokee

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

3 Answers

1999 jeep tj cranks but wont start


replace the crankshaft position sensor

Aug 16, 2008 | 1999 Jeep Wrangler

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