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Re-occuring check engine code 123 200

posted by  yama on  Sat Aug 25 14:12 CST 2012
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last visit: Fri Oct 25 05:26 CST 2013
[RELATED]

One of my 240's has the re-occuring check engine code 123 problem. Changed out the sensor with a new Bosch but it still occurs. A month ago I cleaned all the ground connections and problem seemed to go away for a awhile but now its back again. I've seen a number of similiar post and a couple of different ideas to the cause. Has found the actual problem? Was thinking of changing to a new 87C thermostat and possibly adding some redline water wetter.






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