Engine Acting Up While Driving. Any Thoughts?

Forum for Infiniti M37, M56 M35h Hybrid and Q70 owners.
spoons22
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Engine Acting Up While Driving. Any Thoughts?

Postby spoons22 » Thu Jan 18, 2018 3:49 pm

Three times over the last month the car's engine has acted up while driving. It's the same sequence of events each time. Randomly, the traction control indicator light will come on. Then the IBA OFF indicator light will come on. The Blind Spot Warning and the Lane Departure light will come on.
It will start to lose power in the engine and when I try to give it more gas it will start to buck at 2500 RPM. It will not rev past that point and will continue to buck and be unable to shift into another gear. If I continue to give it gas it will gradually lose power and will slowly rev down until you take your foot off the gas.
There have been a couple correlations in the times it has happened. I've had the car in snow mode. The weather was similar each time. It was inclement weather, either being snowy and windy to wet and slushy.
I have been able to shift the car over into manual mode and shift through the gears do make it driveable. You still have to avoid the 2500 RPM limit.

Any thoughts, ideas or similar experience would be appreciated.


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reggiebrown40
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Re: Engine Acting Up While Driving. Any Thoughts?

Postby reggiebrown40 » Thu Jan 18, 2018 7:05 pm

camshaft or crankshaft sensor faulty?

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Ilya
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Re: Engine Acting Up While Driving. Any Thoughts?

Postby Ilya » Thu Jan 18, 2018 7:25 pm

Could be going into brief limp-home-mode thanks to the MAF. Is there any issues with your intaking tubing? Rips? Tears?

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Kprad12
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Re: Engine Acting Up While Driving. Any Thoughts?

Postby Kprad12 » Thu Jan 18, 2018 8:40 pm

reggiebrown40 wrote:
Thu Jan 18, 2018 7:05 pm
camshaft or crankshaft sensor faulty?
My car would shift fine but if i revved past 5.5k it would jolt and i never kept pressing so i don't know what happened after. Took it to the dealer and they replaced the crankshaft positioning sensor and it was fine. I am gonna assume you have the same problem.

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Re: Engine Acting Up While Driving. Any Thoughts?

Postby EdBwoy » Thu Jan 18, 2018 9:07 pm

Another thing to add is watching out for the snow:
car-bucking-jerking-issues-t618557.html
Man, I wish people came back to post any follow up or updates to the issues they sought help for.

Also someone reported an RPM limit due to a bad fuel pump. Not very sure what RPM that would be on an M37 though.

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Debonair
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Re: Engine Acting Up While Driving. Any Thoughts?

Postby Debonair » Fri Jan 19, 2018 7:56 am

Check your battery cables and put a scanner on the car to check for codes.

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armybrat
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Re: Engine Acting Up While Driving. Any Thoughts?

Postby armybrat » Wed Jan 24, 2018 4:51 am

May be a different problem, but I experienced a similar situation that I was able to record...I was on the interstate, normal driving mode. It ended up being an exhaust valve control error code. It was caused by a loose timing chain that had stretched due to a faulty oil jet. This is a known issue with the 5.6 motors, and there is a recall to address it. Not sure about the V6 though.

spoons22
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Re: Engine Acting Up While Driving. Any Thoughts?

Postby spoons22 » Fri Feb 02, 2018 10:51 am

There was finally some inclement weather the last two days and the issued appeared again on my morning commute to work. I was able to put my scan tool on while all the lights were on. It registered two fault codes: P0060 (HO2S Heater Resistance (Bank 2 Sensor 2)) and P0101 (Mass Air Flow Circuit Range/Performance). I looked over the intake tubing and didn't see any rips or tears. I looked over the filters and the gasket seal around them and they looked fine.
When it happened yesterday morning it had been and was snowing, I didn't have the car in snow mode, and it happened three minutes into the drive. This afternoon it happened 40 minutes into my commute home (snow mode) and the wind was blowing all the snow off the trees. Snow has to be effecting one of the senors. Whether its the camshaft or crankshaft sensor, 02 sensor, or MAF is the question. This only happens when it's snowing. All other times the car runs great. I've had the car's maintenance schedule performed by Infiniti every 30,000 miles and the last one was is November. So I don't think the air filters seals letting snow past into the MAF.
I might just see which sensor is the cheapest and start from there.

I've been looking at a new OBDII scan tool for more accurate diagnosis for all my vehicles. Does anyone have a recommendation? Does anyone have one of the Launch Tech scan tools? They seem to offer a large vehicle database for specific OEM level diagnostics.

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Re: Engine Acting Up While Driving. Any Thoughts?

Postby EdBwoy » Sat Feb 03, 2018 11:58 am

spoons22 wrote:
Fri Feb 02, 2018 10:51 am
... I was able to put my scan tool on while all the lights were on. It registered two fault codes: P0060 (HO2S Heater Resistance (Bank 2 Sensor 2)) and P0101 (Mass Air Flow Circuit Range/Performance)...
Could you confirm with certainty that it was P0060 and not P006A?
I know you mentioned following recommended maintenance schedules, but I don't know the story behind the air filters themselves. Even when appearing "clean" to the naked eye, filter elements lose efiiciency over time.
I would replace the air filters with OEM parts and start from there.

Image

spoons22
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Re: Engine Acting Up While Driving. Any Thoughts?

Postby spoons22 » Sun Feb 04, 2018 12:48 pm

I can confirm that the code was P0060.

Image

I will start with air filters and see what happens.

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Re: Engine Acting Up While Driving. Any Thoughts?

Postby EdBwoy » Wed Feb 07, 2018 1:23 pm

Somebody else in that linked thread had the same issues and said that replacing the air filters solved these problems.


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