ENGINE Rebuild, P0011, P0021 Help!

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With Service Manuals diagrams, components, TSBs, and R&R procedures



Number: 548509
Vehicle Application:
2008 G37 3.7
Customer Concern: Malfunction Indicator Light (MIL) is on. Bank 1 Intake Valve Timing (IVT) control code P0011. Has a low power complaint. The engine will not rev higher than 2400 RPM. Scan data shows the bank 1 IVT at -14 degrees and the bank 2 IVT at 0 degrees at idle. Can manually operate the IVT control solenoids on each bank and get the engine speed to drop the engine to run rough.
Average Reported Mileage: 50000
Tests/Procedures: 1. Scope the Camshaft Position (CMP) sensors and the Crankshaft Position (CKP) sensor and check for good square wave signals and check the phasing (sync) of the signals.

2. Remove the bank 1 intake valve timing cover from the front of the timing chain cover and use a 3 mm allen wrench in the front holes in the center of the bank 1 intake camshaft sprocket - it should only go in about 3/8 inch. The back holes should allow the allen wrench to go in over 3/4 inch.

3. If the front holes only let the allen go in 3/8 inch, then the intake camshaft sprocket is at 0 degrees. So then either the timing chain is off, or the camshaft sensor reluctor fingers on the front of the camshaft sprocket may have turned on the sprocket.

4. Can see if the reluctor will turn on the front of the intake camshaft sprocket. See related document for position of the reluctor fingers on the front of the camshaft sprocket.
Tech Tips: We have been seeing cases of the reluctor fingers for the CMP sensor, turning on the intake camshaft sprockets. The reluctor fingers are press fit onto the front of the sprockets. The related document shows the known good (new sprocket) CMP sensor reluctor position on the intake camshaft sprocket, along with one where the reluctor had turned on the sprocket. See if the reluctor is loose and if you are able to turn it, and also if it is in the correct position. The photo is from a 2012 but both are 3.7 Nissan engines so I would expect them to be the same. The pictures are not straight on but hopefully they will give you an idea if that is the issue with the vehicle you are working on.
Author:
Paul Kujawa
Related Document(s):
2012 370Z intake camshaft sprocket
Diagnostic Codes
P0011
Potential Causes

With Service Manuals diagrams, components, TSBs, and R&R procedures
Bank 1 Intake Camshaft Sprocket
Timing Chain
Confirmed Fix Summary
Confirmed Fix

With Service Manuals diagrams, components, TSBs, and R&R procedures
2 - Replaced/Repaired Bank 1 Intake Camshaft Sprocket


Confirmed Fix Details


Tech Reported Fix Details Confirmed Fix


1 Brent Simmons
May 4, 2015 2010 Infiniti G37, 3.7L, V6, USA *
Bank 1 Intake Camshaft Sprocket
- REPLACED BANK1 CAM SHAFT GEAR SPROCKET
Replaced Bank 1 Intake Camshaft Sprocket


2 Stanley Sadowski
March 24, 2015 2008 Infiniti G37, Sport 3.7L, V6, USA *
Bank 1 Intake Camshaft Sprocket
- Turned the reluctor fingers back on the intake camshaft sprocket.

50,000 miles Repaired Bank 1 Intake Camshaft Sprocket
- Confirmed Fix - Exact Vehicle Match- Confirmed Fix - Similar Vehicle Match*
- Indicates a Similar Vehicle - Not an exact match to the vehicle selected

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