||07-23-2009 07:55 AM
Coolant Temp sensor dilemma
Peake research tool threw up the error for coolant temp sensor and knock sensor, bought new knock sensor and temp sensor, installed the lot, knock sensor code disappeared after battery disconnect for 24 hours but the coolant temp sensor is still there e4 from memory, anyhow what are the symptons for a dead/dodgy coolant temp sensor? and most importantly how do I get it to go away? is there a way to clear codes apart from disconnecting the battery? car is a 1993 318is.
||07-23-2009 09:48 AM
It may not be the sensor per se that is faulty so much as the connection to the sensor. Surface corrosion that comes with age could be giving a faulty reading (happens with my car, a '95) so unclip the connection, clean it up a bit, and see if that does the trick. As to how/when codes disappear, some seem to go after the battery is disconnected for 10 mins., some for 2 hours, some overnight, I wish I had a definitive answer.
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