P0011 when cold but I can clear the code and it runs fine for the rest of the day.

could be your timing chain

Not all fault codes are genuine , you are best to hook car up to an OBD2 reader and clear codes first , if code re-appears investigate further , some codes are ghost codes or old codes stored

Causes may include:

• Timing chain stretched, or timing belt skipped a tooth due to wear
• Misalignment of timing belt/chain
• Tone ring on crankshaft slipped/broken
• Tone ring on camshaft slipped/broken
• Bad crank sensor
• Bad cam sensor
• Damaged wiring to crank/cam sensor
• Timing belt/chain tensioner damaged

1. First, visually inspect the cam and crank sensors and their harnesses for damage. If you notice broken/frayed wires, repair and recheck.
2. If you have access to a scope, check the cam and crank patterns. If a pattern is missing, suspect a bad sensor or a slipping tone ring. Remove the cam gear and the crankshaft harmonic balancer and inspect the tone rings for proper alignment and make sure they're not loose or damaged or that they haven't sheared the key that aligns them. If they are properly installed, replace the sensor.
3. If the signal appears normal, then check the timing chain/belt for proper alignment. If it's misaligned, check for a damaged tensioner that may have allowed the chain/belt to slip a tooth or several teeth. Also check that the belt/chain isn't stretched. Repair and recheck

http://www.datsc.com/tabid/122/OBD-Error-Code/P0011/Diagnostics/Mercedes-Benz/Default.aspx
"..........OBD Code P0011refers to
A code P0011 refers to the VVT (variable valve timing) or VCT (variable camshaft timing) components and the car's PCM (powertrain control module, also called an ECM). That consists of a few different components but the P0011 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is above a set limit (over-advanced), the engine light will be illluminated and the code will be set. The "A" camshaft is either the intake, left, or front camshaft.

SymptomsPossible sumptoms of OBD code P0011
Most likely a P0011 DTC will result in one of the following: hard starting, poor idle, and/or stalling. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.

CausesPossible causes of OBD code P0011
A P0011 DTC trouble code may be caused by one or more of the following: Incorrect camshaft timing Wiring problems (harness/wiring) in intake timing control valve control solenoid system Continuous oil flow to VCT piston chamber Failed timing valve control solenoid (stuck open)

Possible SolutionsThis DTC code is a result of a mechanical fault of the VCT unit or related components, so there is no need for electrical diagnosis. Refer to vehicle specific repair manual to perform component tests for the VCT unit. Notes: Dealer techs have advanced tools and the ability to follow detailed troubleshooting steps, including the ability to test components using a scan tool.

Related CodesP0010 P0012 P0020 P0021 P0022..........."

It is definatly a timeing problem but 1st check you pluged all wireing back in especially cam sensor & VVT solinoid if fitted. You may just need to reset the code & see if prob remains. I had a honda engine light come on after haveing VVT solinoid out & just had to reset comp & it was fine. If all looks good there you will need to recheck the cam timeing you could be a tooth out. Look at this link. http://www.permoveo.ltd.uk/tabid/122/OBD-Error-Code/P0011/Diagnostics/Nissan/Default.aspx

Have you had a timeing belt done? The code refers to the VVT (Variable Valve Timeing) or VCT (Variable Cam Timeing) Same thing. It may need a cam sensor replaced or a problem with the VVT control solinoid This can happen if the VVT solinoid has been unbolted for some reason. The computer of the car may just need to be re set if your lucky

PLEASE READ ALL THIS INFO.

MAKE SURE THE ENGINE OIL IS CLEAN AND CHANGED AT PROPER INTERVALS
P0011 NISSAN - Intake Valve Timing Control Performance Bank 1

Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible engine lack/loss of power
- Posssible engine rough idle
Possible causes - Harness or connectors
- Intake valve timing control solenoid valve circuit is open or shorted
- Intake valve timing control solenoid valve may be faulty
- Crankshaft position sensor (POS) may be faulty
- Camshaft position sensor
Tech notes Since the Intake valve timing control solenoid valve uses oil flow to control timing, dirty oil can cause the valve to stuck open or close. Before replacing the valve, change engine oil and filter and reset engine code. When is the code detected? When there is a gap between angle of target and phase-control angle degree, the valve will stop working and the ECM will trigger the P0011 code. P0011 NISSAN Description This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to increase engine torque in low/mid speed range and output in high-speed range.

The intake valve timing control solenoid valve changes the oil amount and direction of flow through intake valve timing control unit or stops oil flow. The longer pulse width advances valve angle. The shorter pulse width retards valve angle. When ON and OFF pulse widths become equal, the solenoid valve stops oil pressure flow to fix the intake valve angle at the control position.
MAKE SURE YOUR OIL IS CLEAN AND CHANGED AT PROPER INTERVALS.

You got two codes for Timing Over
Advanced

P0011-Bank 1
P0021-Bank 2

I'am assuming you know that

Cams moved, I would think,
when you did tensioners !!

Or , you have to reset the sensors,
of which I don't know your system

Hello, There is an extended Warranty for "Cam Phasers". I want to say 7 Years and 90,000 Miles. But some of the repairs are on a case by case basis. Years 2004-2008 were affected.

I will tell you what your Codes mean.p0011 and p0022 are both for the Camshaft position sensors. One side is overadvanced and the other is retarded. Code p 0171 is an O2 sensor, Code 0300 is random misfiring, Codes p0305 and 0307 are the #5 and #7 cylinder misfires. Code p0316 is a general misfire when starting up, and finally the p2198 is a rich condition O2 sensor on bank2 sensor 1.

All of these make sense when the Cam on bank 1 is over advanced you will run lean and the Cam on bank 2 is retarded, you will run rich. The misfires are from incorrect timing and affected fuel mix.

There are "cheater tools" for this repair which will cut Labor costs in half. Check the Web for Mac tools, Snap-on, and so forth. The cheater works by pressing down on the internal chain tensioner to make slack in the timing chain. You take off the valve covers and unbolt the Cam (Phaser) gear and sneak it out through the valve cover opening. The CAM PHASERS cost $300 to $500 apiece.

A normal repair without the cheater involves removing the front of the motor up to the heads and still requires removing the valve covers.

I hope my solution is very helpful to you, at least you know why you are getting the Codes you are reading.

Timing Chain & Gears Removal & Installation To Remove:
NOTE: Keep the cam chain away from magnetic fields.
Crankshaft set at TDC marks

1. Turn the crankshaft pulley so its Top Dead Center (TDC) mark (1) lines up with the pointer (2).
2. Raise and support the vehicle.
3. Remove the front tires/wheels. Front undercar splash shield
   
   
4. Remove the front undercar splash shield.
5. Remove the drive belt.
6. Remove the cylinder head cover (See section on Valve Cover).
7. Remove the crankshaft pulley (See section on Crankshaft Damper). CKP sensor and VTC solenoid electrical connectors
   
   
8. Disconnect the Crankshaft Position (CKP) sensor connector (1) and Variable Valve Timing Control (VTC) oil control solenoid valve connector (2).
9. Remove the VTC oil control solenoid valve (See section on VTC Solenoid Valve).
10. Support the engine with a jack and wood block under the oil pan. Ground cable and upper bracket removal
    
    
11. Remove the ground cable (1), and remove the upper bracket (2). Side engine mount bracket removal
    
    
12. Remove the side engine mount bracket. Timing chain cover removal
    
    
13. Remove the timing chain cover bolts both from the front to the block and from the bottom to the oil pan.
14. Remove the timing chain cover.
15. Loosely install the crankshaft pulley. Compress the timing chain auto-tensioner
    
    
16. Turn the crankshaft counterclockwise to compress the auto-tensioner. Lock the timing chain auto-tensioner
    
    
17. Align the holes on the lock (1) and the auto tensioner (2), and then insert a 0.06 inch (1.5 mm) diameter pin (3) into the holes.
18. Turn the crankshaft clockwise to secure the pin. Removal of the timing chain auto-tensioner
    
    
19. Remove the auto-tensioner. Removal of the timing chain guide B
    
    
20. Remove the cam chain guide B. Removal of the timing chain guide A
    
    
21. Remove the cam chain guide A (1) and tensioner arm (2).
22. Remove the cam chain.