I was driving my G37S 6MT sedan on Saturday when the "Service Engine Soon" light came on and the engine would not rev past 2,000 RPM. I had the car towed to the dealer and after about a 1.5-2 hrs, I was told that my car was ready. My service advisor said it the first time they had seen this but I was good to go and they would call Infiniti's tech support on Monday to go over this with them. Per my invoice, this is what came up:

FOUND CODE P1090; VVEL ACTR MOT-B1, P0300: MULTICYL MISFIRE, INSPECT HARNESS & CONNECTORS OK. OIL LEVE NORMAL. RESET DT. ROAD TEST VEHICLE OKAY.

So anyways, I start driving home and the car feels fine and is driving normal. 20 mins later, the "Service Engine Soon" light comes back on and the car is in limp mode again, doing 5-10 mph max. I managed to get off of the freeway and had the car towed back to the dealership. We'll see if they can figure it out this time but I suspect it'll probably be either a software or a sensor issue. I'll keep you guys posted when I hear back from my service advisor.

 

Yuck, sorry to hear you had to go through that man.

Let us know how it turns out.

 

That's wicked weird. Hopefully they figure out the problem, if not I think it's 3-4 attempts by the dealer to fix the problem until you get the car lemoned and get a new one if they can't fix the problem.

 

Wongster, Sorry to hear about your problem. I would really like to know a couple of
things if you don't mind. I've been researching this issue and have some theories.
Our G37's should shut-down to "safe" mode when the oil temperature reaches something
around 360 degrees. How many miles are on your car? How many miles have
you driven with the oil in your car that was in it when this first happened?
What brand and weight oil was it? Thanks, this info' may really be helpful
to all of us. .....Jon sends

 

Sounds like a new one to me!

 

Weird, keep us posted.

 

Sounds like the code could be a VVEL motor failure? Possibly resulting in misfire.

I would theorize that the RPM is kept super low since compression would be compromised due to the valves not functioning properly...

Let us know how it goes!

 

My car had 9,274 miles when it first went into limp mode. The temperature gauge was at it's normal operating level and I've been using 5W30 Nissan Ester Oil. I've had the oil changed at around 3,700 and 7,600 miles, so it's been approximately 1,700 miles since my last oil change.

One thing I just realized is that car "warmed up" and reached it's normal operating temerature fairly quickly the night before and the morning that it went into limp mode. I'll bring that to my service advisor's attention and keep you guys posted.

 

Hmmm... that really sucks!

I'll say it again... I really think this ester oil thing is a stop gap measure... a patch of sorts, for a bigger problem that Nissan isn't being forthcoming about...

Any word from them yet today?

 

My guess is bad cam sensor.

 

I spoke to my service advisor today and he said that they were instructed by Infiniti tech support to replace the relay harness and the VVEL motor. He wasn't sure if there were any software updates. I will keep you guys posted as I find out more.

 

I finally picked up my car yesterday. According to my service advisor, there was a bad VVEL bank #1 (passenger side) motor. They were told by the Infiniti tech line to replace the bank #1 VVEL motor/actuator and the relay harness. Here is what my invoice says:

PULLED DTC P100A AND P1090 VVEL SYSTEM BANK #1 AND VVEL ACTUATOR BANK#1. REPLACED VVEL RELAY AND BANK#1 VVEL MOTOR/ACTUATOR ASSY PER TECH LINE RECCOMENDATIONS. CLEARED CODES, ADJUSTED VVEL POSITION SENSOR, SET IDLE AIR VOLUME LEARN AND ROADTESTED VEHICLE. NO FURTHER CONCERN.

Parts:
ACTUATOR ASSY-VEL-23745-EY01A
RELAY-25230-9F915

I drove the car ~100 miles yesterday and today and the car appears to be driving fine so far. I just hope this is an isolated case and does not become a widespread issue with the VQ37VHR motors.

 

it happened to me as well last year after going to long beach for SEMA. I was on the freeway then suddenly my car just wont pass 2K RPM. Got my car was towed and went to the nearest dealership. They found out that a ZIPLOCK( yup a ZIPLOCK) was stuck in my throttle body. Before that week , my intakes were installed .. Im not really sure until this day how did that ziplock end up in there. maybe when they installed the intakes? but anyway, since then my car drives fine.

 

If it happens again... tell them you don't even want the car fixed because it's dangerous every time it happens... and lemon the car.

They give you the money back, you drove the car for free = win.

 

Did they dealer say anything about ur after market intake? Like warranty void and stuffs....