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Cause for the dreaded P0011/P0021 codes that everyone is curious about

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Old 01-11-2018, 08:37 PM
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Help!!!!! 01/11/18

Im dealing with this issue right now with codes p0011 and p0021. The car is an 06 Infiniti G35 Coupe 5at DE MOTOR.

I recently had my engine replaced bc of bad compression after going turbo. Sold the turbo and got a USED 110K mile motor. Drove it 900miles and went WOT one night and the car starts popping from the exhaust. Didn't think anything of it till the next day I went WOT again and got to my destination and turned the car off for a good 1 or 2 hours. Turned the car on and it struggled. I thought it was weird so I turned it off and then back on and it struggles but this time with the 2 codes.

took it back to the shop and the shop warrantied my engine and got me another engine at 55k miles. compressions on this engine were really good. BUT the problem still exist!

I can't think its an engine problem. The only thing that was pulled out and replaced was the engine so what gives?!

Is it an ECU issue? Harness issue? PLEASE HELP ME GUYS!!!

Last edited by Algy; 01-11-2018 at 09:26 PM.
Old 01-11-2018, 08:55 PM
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Quote:
Originally Posted by Algy View Post
Im dealing with this issue right now with codes p0011 and p0021. The car is an 06 Infiniti g35 5at.

I recently had my engine replaced bc of bad compression after going turbo. Sold the turbo and got a USED 110K mile motor. Drove it 900miles and went WOT one night and the car starts popping from the exhaust. Didn't think anything of it till the next day I went WOT again and got to my destination and turned the car off for a good 1 or 2 hours. Turned the car on and it struggled. I thought it was weird so I turned it off and then back on and it struggles but this time with the 2 codes.

took it back to the shop and the shop warrantied my engine and got me another engine at 55k miles. compressions on this engine were really good. BUT the problem still exist!

I can't think its an engine problem. The only thing that was pulled out and replaced was the engine so what gives?!

Is it an ECU issue? Harness issue? PLEASE HELP ME GUYS!!!
Have you read the FSM?



"TE:

If DTC P0011 or P0021 is displayed with DTC P0075 or P0081, first perform trouble diagnosis for
DTC P0075 or P0081. Refer to
EC-193, "
DTC P0075, P0081 IVT CONTROL SOLENOID VALVE
"
.

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.
TESTING CONDITION:
"]Before performing the following procedure, confirm that battery voltage is between 10V and 16V at idle

If you have a dead or weak battery that may be the source of your problem?

Telcoman
Old 01-11-2018, 09:18 PM
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I would rule out the engine and all components like solenoids since the issue persisted on BOTH engines. Check with the mechanic though to verify they didn't swap any sensors, solenoids, anything.

Are you using a custom tune?

Short answer is yes it might be the ECU but go through all the steps in the FSM and you will find your answer.
Old 01-11-2018, 09:25 PM
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Originally Posted by [email protected] View Post
I would rule out the engine and all components like solenoids since the issue persisted on BOTH engines. Check with the mechanic though to verify they didn't swap any sensors, solenoids, anything.

Are you using a custom tune?

Short answer is yes it might be the ECU but go through all the steps in the FSM and you will find your answer.
Yes the car has been flashed with UPREV
Old 01-11-2018, 09:26 PM
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Quote:
Originally Posted by telcoman View Post
Have you read the FSM?



"TE:

If DTC P0011 or P0021 is displayed with DTC P0075 or P0081, first perform trouble diagnosis for
DTC P0075 or P0081. Refer to
EC-193, "
DTC P0075, P0081 IVT CONTROL SOLENOID VALVE
"
.

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.
TESTING CONDITION:
"]Before performing the following procedure, confirm that battery voltage is between 10V and 16V at idle

If you have a dead or weak battery that may be the source of your problem?

Telcoman
Sorry I should have been more descriptive. Its a 2006 G35 COUPE 5AT DE MOTOR
Old 01-11-2018, 10:18 PM
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Cleric670
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My guess is you should reflash back to stock and see if the problem persists. This is all under the assumption that you have a cable, if you had a tuner do it then you won't be able to just flash back to your current tune without paying them again probably.
Old 01-11-2018, 10:55 PM
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Quote:
Originally Posted by [email protected] View Post
My guess is you should reflash back to stock and see if the problem persists. This is all under the assumption that you have a cable, if you had a tuner do it then you won't be able to just flash back to your current tune without paying them again probably.
That was my initial guess thinking its something wrong with the tune. So what I had the tuner do was just refresh it with my current tune to see if it would do anything. We didn't refresh back to stock though.

But then again nothing changed

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03, 2002, 2006, 35, code, exhaust, g35, infiniti, leak, nissan, oil, p0011, p0014, p0021, p0024, qx4
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