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Infiniti Q45 Maintenance and Repair

248 messages,  Last post on Nov 30, 2009 at 8:54 AM

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What is this discussion about? Infiniti Q45, Sedan

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#241 of 248 98 Q45 brake and check engine light by aircalgal Oct 10, 2009 (5:30 pm)
My brake light has been going off and on for some time. Now the check engine light is coming on. The car has been serviced, so there is nothing wrong. Do I need a new sensor or could it be the alternator. If it is a sensor, how much does that cost. Replies to this message: sidwell (Oct 11, 2009 7:08 am)
#242 of 248 Re: 98 Q45 brake and check engine light [aircalgal] by sidwell Oct 11, 2009 (7:08 am)
Replying to: aircalgal (Oct 10, 2009 5:30 pm) My experience with Japanese cars is that when the alternator starts going bad, it first affects the sensors, causing the warning lights to come on. I've owned Japanese cars since my first 280ZX (first of four ZXs). Only problems were with alternators failing, like on my current car, a '01 Q45 Anniversary Sports model. Good luck, Bil
#243 of 248 2 questions 1999 Q45 by norwesterner Nov 10, 2009 (8:58 pm)
Question 1. Low beam headlight. How do I change it? From the front or back? From the back there is a wire that pops off but can't seem to remove the light, not sure it is the correct light anyway, it is next to a 2 inch round plastic unit with fins on it.    Question 2. When I am sitting a red light the engine starts missing and then when I start moving it misses for about the first 100 feet or so.    Any suggestions? Thanks Replies to this message: sidwell (Nov 16, 2009 10:46 am)
#244 of 248 Re: 2 questions 1999 Q45 [norwesterner] by sidwell Nov 16, 2009 (10:46 am)
Replying to: norwesterner (Nov 10, 2009 8:58 pm) Question 1: I dunno Question 2: My 2001 Q45 "lopes" at idle, some of the time. A reading of the trouble code shows low fuel pressure. I'm waiting on delivery of the fuel pressure part now. Sure hope thats it.... If yours is a true "miss" it could be one of the plug wires. I had one go bad and they short out against the tube they sit in. Unfortunately, even though the wire is replaceable, it is not offered as a part. Had to buy the whole part. Bil
#245 of 248 03 Q45 Navigation and Info screen went dark. by cobrapc Nov 24, 2009 (10:32 am)
My 03 Q45 navigation and information screen went dark. The stereo and blower were still working at the settings they were at when it went dark, but no control buttons function. I couldn't find any blown fuses, nor could I find any listed as navigation or info center. Any ideas?
#246 of 248 spark plugs and unleaded gas by egypt25 Nov 24, 2009 (11:15 am)
i just found out that the previous owner was using unleaded full in my 96 q45 infiniti. i also used it(twice). will it be fine for me to drive my car until the end of december, because i wont have the money to have the spark plugs changed until then. oh and i will use premium gas unil i have it repaired
#247 of 248 Catalyst Question by qinquirer Nov 30, 2009 (7:21 am)
Considering purchasing an 02 Q45. History shows "CATS are deteriorating" and "Needs catalyst." What does the catalyst do? Is this repair expensive? I would like to factor possible repair costs in as I negotiate the price on the car. Thanks. Replies to this message: sidwell (Nov 30, 2009 8:54 am)
#248 of 248 Re: Catalyst Question [qinquirer] by sidwell Nov 30, 2009 (8:54 am)
Replying to: qinquirer (Nov 30, 2009 7:21 am) There are 4 cats on the Q45. If you're a "dealer does all my work" kinda guy, maybe you should rethink buying it. Otherwise, I've seen them online for as low as ~$60. And surely all 4 won't need replacing. What I did was go to JCWhitney.com where they have a product you add to the gas and it will clean the cats. They send 2 bottles, under ~$20 shipped. Worked for me. Although the can says it cleans oxygen sensors, I had to replace 2 of them (online=$28 each). I love my 2000 Q45. Most reliable car I've ever owned, and I've had 85 or more cars. Good luck, Bil

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