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Engine shuts off when idling and hot, also codes P0171, P0102, P0113 and P0300

Tiny
MARCOSP
  • MEMBER
  • 2012 NISSAN VERSA
  • 1.6L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 85,249 MILES
Hi All,

I need some help troubleshooting some issues with my car. First of all, I need to try at least three times before the car starts. It runs fine for about 2 hours and then the misfires start and in about 30 minutes it shuts off.

After it shuts off I need to wait until it cools down to start again.

I have a BlueDriver and it shows 4 permanent codes:
P0171 - Fuel Sys-Lean-B1
P0102 - Mass or Volume Air Flow Sensor "A" Circuit Low
P0113 - Intake Air Temperature Sensor 1 Circuit High Bank 1
P0300 - Random/Multiple Cylinder Misfire Detected

What I've tried so far:
1. Change the Mass Airflow Sensor
2. New spark plugs
3. New ignition coils

Could it be the fuel pump (it says fuel sys lean but I can't find any vacuum leaks), if so, why would it fail when the car gets hot?

When I am revving it feels normal, when it's idling it's rough.
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Wednesday, October 27th, 2021 AT 3:40 PM

13 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,262 POSTS
Hi,

The lean mixture could indicate low fuel pressure. If you haven't already, check the pressure. Here is a link that shows how it's done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

I've also attached the procedures specific to your vehicle and the manufacturer's fuel pressure specifications below.

The idea that it has to cool off before restarting leads me to think it could be an issue with the crankshaft position sensor. Since it restarts after cooling off, that is a common symptom of a bad sensor. Do me a favor. Read through this link and see if you feel it mirrors what you experience.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Note: If the crankshaft position sensor is failing, you will lose spark to the plugs and an RPM signal. If you have a tachometer, see if the needle moves a little when cranking during a no-start condition. Or here is a link that explains how to test for ignition spark. Do this when it won't start.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Let me know what you find, if you have questions, or if there is anything I can do to help.

Take care,

Joe

See pics below.
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Wednesday, October 27th, 2021 AT 6:30 PM
Tiny
MARCOSP
  • MEMBER
  • 12 POSTS
Great Information, thank you!

I just bought a new crankshaft sensor and I'll install as soon as it arrives.

I'll also look for a fuel pump test kit to check the lean mixture. Hopefully I fix all the issues with this.
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Thursday, October 28th, 2021 AT 10:50 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,262 POSTS
If you have a live data scan tool, you can check the short-term fuel trims. That will help you determine if there is an issue.

Let me know what I can do to help.

Joe
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Thursday, October 28th, 2021 AT 6:48 PM
Tiny
MARCOSP
  • MEMBER
  • 12 POSTS
I am not really sure how to read the short-term fuel trim. But when I turn the car on and it's cold it shows 25% and when I rev it goes to -9/-10%.

Something else weird that was happening last time I was testing is that the traction control light turned on and the ABS light as well for a few seconds, even though I didn't press the button.

I also heard a clicking noise (relay) from the left side of the steering wheel, where the traction control button is. That happened every 3 seconds.

Not sure if that's related to my previous problems.
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Thursday, October 28th, 2021 AT 10:35 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,262 POSTS
Under normal conditions, fuel trims should be between -10% and +10% at idle. I do notice the coolant temperature is showing approximately 17c. What that the approximate outside temperature when it was checked?

Also, the trims (short term) are very high. That indicates the computer is trying to add fuel to the engine to reach the best air/fuel mixture. However, that could be because it is cold. Could you recheck trims at operating temperature?

Joe
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Friday, October 29th, 2021 AT 5:42 PM
Tiny
MARCOSP
  • MEMBER
  • 12 POSTS
The fuel pressure gauge shows around 30PSI when idling and it loses around 2-4PSI when I press the gas pedal.

Should I assume the fuel pump / filter is bad and replace it? I still didn't get the crankshaft position sensor.

I also didn't find any leaks in the fuel line; it is still the same (30 psi) after 30 minutes.

I'll recheck the trims with car at normal temperature, outside temperature now is ranging from 0 - 7 °C.
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Saturday, October 30th, 2021 AT 1:35 PM
Tiny
JACOBANDNICKOLAS
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Hi,

The drop in pressure when you hit the throttle is normal. The pressure is too low, however. It indicates 51 PSI in the manual when idling. Either you have a filter plugged or a tired fuel pump.

The filter is in the fuel tank. I circled the pump, sender, and filter in the pic below. Let me know what I can do to help.

Joe

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Saturday, October 30th, 2021 AT 8:47 PM
Tiny
MARCOSP
  • MEMBER
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Just waiting for the fuel pump to arrive now. I'll try to install the crankshaft position sensor as soon as I locate it, I've tried with some diagrams but no luck so far.
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Wednesday, November 3rd, 2021 AT 8:46 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,262 POSTS
Hi,

The crankshaft position sensor should be toward the rear of the engine block. Take a look at the pic I attached and let me know if that helps.

Take care,

Joe

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Wednesday, November 3rd, 2021 AT 9:07 PM
Tiny
MARCOSP
  • MEMBER
  • 12 POSTS
Thanks Joe!

Finding and replacing the crankshaft sensor was a pain but I finally did it!

Unfortunately, that didn't help with misfires, after an hour it started again. It threw the random misfires and after 10 minutes the car gradually got worse until it shut off.

Could it be the fuel pump still? I couldn't replace it since the new one didn't arrive yet.
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Saturday, November 6th, 2021 AT 7:21 PM
Tiny
JACOBANDNICKOLAS
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Hi,

Absolutely, it could be the pump. Have you checked fuel pressure when you notice the problem?

Let me know.

Joe
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Saturday, November 6th, 2021 AT 9:10 PM
Tiny
MARCOSP
  • MEMBER
  • 12 POSTS
Hi Joe,

Thanks for your help, the car runs perfectly now after changing the fuel pump.

I was not able to clear the P-DTC's yet, I tried the driving pattern, but I might have done something wrong. I will wait for a week and see if it clears the codes.
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Monday, November 15th, 2021 AT 10:54 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

Thanks for the update. I'm glad to hear it's running good again. As far as the codes, give them some time and they should clear. If they don't, let me know and we'll figure out what to do next. However, it could take a couple of hundred miles.

Take care of yourself and please feel free to come back anytime in the future. You're always welcome here.

Joe
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Monday, November 15th, 2021 AT 5:37 PM

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