Reappearing Check Engine Light

4 messages, Last post on Oct 28, 2009 at 7:56 AM

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What is this discussion about? Infiniti Q45, Sedan

#1 of 4 Reappearing Check Engine Light by dionne3 Feb 16, 2009 (4:00 pm)
I have a 2001 Infiniti Q45 and had a 1997 prior due to my love for the performance of this beauty. My dilemma now is the check engine light keeps coming back on after having the vehicle serviced. The latest diagnosis turned up something with regard to P1447-Manufacture control, P1492-Auxiliary emission control and P0330-Knock sensor circuit malfunction. Very confused and only wish to have the problem resolved whatever it is once and for all. Please help... Thanks for any suggestions!
#2 of 4 98 Q45 brake/check engine light stays on by aircalgal Oct 20, 2009 (10:16 pm)
my 98 infinity Q45. The brake light and service engine soon stays. I've had the car serviced. Is it a sensor? How much does something like this cost? Replies to this message: epettus (Oct 21, 2009 7:39 am)
#3 of 4 Re: 98 Q45 brake/check engine light stays on [aircalgal] by epettus Oct 21, 2009 (7:39 am)
Replying to: aircalgal (Oct 20, 2009 10:16 pm) Had the same problem and found that the altenator was charging at 13.4 volts but needs to be atleast 13.7 volts to turn lights off. Have your charging voltage checked
#4 of 4 knah2003 by knah2003 Oct 28, 2009 (7:56 am)
Hi there...I read in the diagnostics manual that the system should be reset after repair/diag or message wiil not go away....