'00 Cherokee Sport - P0303 and/or P0155
06-30-2011, 09:19 AM
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'00 Cherokee Sport - P0303 and/or P0155
Having an issue where either the P0303 code (misfire) or the P0155 (02 sensor) code keeps popping up in my Cherokee. It's either one or the other, but never both at the same time. Does anyone have any idea what would cause these two to keep "rotating" popping up?
06-30-2011, 02:00 PM
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Year: 1999
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Engine: 4.0
Most likely not related, and that you have two separate issues.
The P0303 can be a spark plug issue (get a new one in there and try it and don't run Bosch plugs), or it can be related to "heat soak" which the 00-01 are very susceptible to having. SEARCH for information on this.
The P0155 is for the heat circuit for the oxygen sensor. Could be the sensor itself, and with it being intermittent, it probably is. Here is a link to more on that code:
http://www.obd-codes.com/p0155
The P0303 can be a spark plug issue (get a new one in there and try it and don't run Bosch plugs), or it can be related to "heat soak" which the 00-01 are very susceptible to having. SEARCH for information on this.
The P0155 is for the heat circuit for the oxygen sensor. Could be the sensor itself, and with it being intermittent, it probably is. Here is a link to more on that code:
http://www.obd-codes.com/p0155
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