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Codes P0011 and P0021, does not respond when depress accelerator pedal?

Tiny
MALLYBOY
  • MEMBER
  • 2005 INFINITI FX35
  • 3.5L
  • V6
  • 4WD
  • AUTOMATIC
  • 214,567 MILES
This vehicle not responding when you start it first in the morning. When it idles for 30 to 40 minutes it will gradually begin to respond very slowly and when it responds, it cannot rise beyond 4,200 RPMs. And when you engage gear Reverse or forward, you will depress the pedal all way down and it will move very slowly and stop, I have changed the IPDM/ER, it didn't solve it. What could be the problem?
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Thursday, December 15th, 2022 AT 12:26 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,366 POSTS
Hi,

The codes are related to the IVT (Intake Valve Timing) control. The cause can be a few different things such as a camshaft or crankshaft position sensor, low oil pressure, IVT control solenoid, engine timing, and so on. I am basing this on the two codes provided are the only one's present.

Now, to diagnose the issue, you need a scan tool that is able to actuate different solenoids. If you look below, I attached the diagnostics for you. Take a look through them and let me know if you are comfortable performing them.

Let me know if you have questions or what you find.

Take care,

Joe

See pics below.
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Thursday, December 15th, 2022 AT 8:12 PM
Tiny
MALLYBOY
  • MEMBER
  • 303 POSTS
I have replaced used IVT Timing Solenoid, but the code still appears back, and I have checked oil pressure on the timing solenoid position by removing and cranking and the oil spill everywhere at high pressure. Could this be ECM, because if you crank the vehicle, it starts fine and stalls, then it does not idle above 450 RPMs.
I attached the screenshot of diagnostic report below.
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Thursday, December 15th, 2022 AT 9:16 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,366 POSTS
Hi,

The ECM is a possibility, but I would go through all the tests listed in the diagnostics. Just for curiosity, what are the short-term fuel trims? Also, am I missing something in pic 4?

Let me know.

Joe
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Thursday, December 15th, 2022 AT 9:39 PM
Tiny
MALLYBOY
  • MEMBER
  • 303 POSTS
Problem solved, replaced flex-plate and everything comes to normal.
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Thursday, December 22nd, 2022 AT 7:02 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,366 POSTS
Hi,

Thank you for the update. That is an odd repair for the problem. Regardless, I'm glad to know it's fixed.

Take care of yourself and I wish you and your family a Great Christmas.

Joe
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Thursday, December 22nd, 2022 AT 10:36 PM

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