Question about Jeep Wrangler

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I have a 2000 jeep wrangler with a 6 cylinder engine. The check engine light came on so I went to AutoZone and they said the code indicated a #6 cylinder misfire. I changed all the plugs, restarted the engine and the light remained on. I don't have any of the symptoms (rough running, poor fuel, poor acceleration, etc.) that indicate other issues. So how do I clear the check engine light. Thanks John M

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Disconnected the negative battery few minutes. THis reset the PCM, if the check turn on again, need scanned to know excatly what code you have there.

Posted on Aug 20, 2010

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Posted on Jan 02, 2017

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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

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Jun 14, 2012 | 2000 Jeep Wrangler

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from the fan end count three spark plugs and you'r there

Oct 07, 2009 | 2005 Jeep Wrangler

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Check engine light codes and troubleshooting


Sounds like you have a vacuum leak for the lean code and the misfires. I don't see a 473 code in my manual, but have a 463. The 463 is for the fuel level sensor open or voltage high.

Jun 01, 2009 | 1998 Jeep Wrangler

1 Answer

Engine keeps missing. unknown codes


Code 1682 indicates low battery voltage. This could be a problematic alternator, which would likely cause misfiring. Autozone should be able to check this for you for free.

Code 1391 indicates the computer can not see the crank or cam sensor signal. This would likely be a result of the misfires.

Code 0320 indicates the crankshaft position sensor reference signal could not be found while the engine is cranking.

All of these issues point to either a cam/crank sensor malfunction or a charging system problem, either or both of which could cause the misfiring.

May 09, 2009 | 1998 Jeep Wrangler

1 Answer

Code scan: P0301 Cylinder 1 misfire detected


Code P0301 is a generic OBD Code for Misfire. It also indicates you have a misfire in the #1 Cylinder. I would start by checking the plug wire to make sure its clean and on all the way (at the coil as well). Then if that doesnt help I would pull the plug out and check the condition of the spark plug. hopefully this will give you some direction. Thanks for Using FixYa!

Sincerely,

JC

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1 Answer

Wrangler engine swap


Yes it will fit, just make sure you don't get in trouble with the issue of smog certifcation.

Sep 17, 2008 | 2000 Jeep Wrangler

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