QUOTE(jfcheong @ Oct 15 2014, 05:44 PM)
I rmb you wrote this before. I did highlight this to SC during my last visit, but they said:" Ini normal, no problem."
I will send in to another SC for checking again.
Thanks bro
Try a different SC,but insist on the change! I had the same answer when I sent in my car, which was acting exactly like yours.
Front desk personnel are not technically trained. They have no idea unsteady coolant temp. is abnormal. Their knowledge of as long as the temp. did not hit the red range then no problem and ini normal, is ok for old engines.
On old engines the coolant/water was only for purpose of cooling the engine and preventing overheat.So as long as there is no overheat, no problem!
Not on these high tech engines. On these engines, coolant temp plays a critical role in combustion strategy. Every signal from cold to hot is sent to ECU which commands respective engine operation. An improper coolant signal feedback to ECU will command an improper engine operation. In your case the improper engine operation will be subtle, unnoticeable for a long while.
When the front desk staff gave me the same reply, "ini normal", i insisted to meet the service engineer. Only then I got the coolant temp. sensor changed.