Problem with my 2002 chevy Trailblazer. 4200 inline 6 cyl.
Dear JK. I have a customer with a SES code p0016 and i am not too familiar with the  adjustable
cam timing on this
4.2l engine. Would appreciate some help. Thanks.

A common cause for code p0014 or p0106 on
Trailblazers and GMC Envoy is the
'Exhaust Cam Actuator Control Solenoid'. They fail internally, or they leak oil into the connector
cavity.  It is mounted to the front passenger side of the cylinder head near the power steering pump.
When it fails, it can also give 'Crank sensor correlation codes'. After replacement, a 'Crank sensor
variation re-learn' procedure must be performed.

We have also had a FEW of the
Cam Actuators fail, but not many. The actuator is part of the
exhaust cam timing gear and the front timing upper cover will have to come off. This is a very
involved repair and would highly suggest an experienced technician for this.

The problem is that if these things are not the problem, and there is allot of metal debre on the
screens of the actuator, this can be a sign of excessive end play on the crankshaft. This would
mean engine overhaul, or replacement if the end play is severe enough to cause damage to the
engine block. This is worst case scenario. Most of the time it is just the solenoid, and cam / crank
position variance re-learn procedure will take care of it. If by chance the replacement of the
tensioner and belt was for belt noise, this could be an indication of excessive crankshaft end play,
as the belt would not be aligned with the other pulleys since the crankshaft has walked forward.
Since this solenoid only controls oil to the exhaust cam phaser why would the crank
sensor variation re-learn procedure need to be done if it is replaced? Nothing with the
cam to crank timing is effected by replacing that control solenoid.
After I have changed the exhaust cam actuator solenoid,how do I do a relearn?
You need a scan tool that has that capability of doing the
relearn. You can go to the dealer and pay 1/2 labor to
have them do it for you.
Hello to all,
Ok i have a 2002 Chevy Trailblazer, first go to your local auto store and have them do
a free diagnostic. I use AutoZone. Once it comes up P0014..then you just saved over
$100+. Now call a major Chevy dealer and buy the cam actuator for about $100.00.
Make sure you do not by a refurbished,or a used one. It is about 6 inches long w/ holes
in the groves,that part goes in the motor and a solid end 1" with a connector on
the end that is visible.(silver) It is located by the power steering pump. Then have your
trusted mechanic do the totals about $150.00+ for everything ,if you have the
dealer do it,its about $700.00. When you replace this, I recommend a tune-up, plugs
and oil change at the same time, and to replace the camshaft positioning sensor(its
above the cam actuator) it costs about $30 at an auto store.......Then once the auto
shop replaces this they will rest the cars computer...then take a long drive on the
highway 25min there and 25min back ...
Then park the car let it completely cool down . Then start the car up and let it run on
idle for about 5-10min with everything on....then take a ride to the auto store i use Auto
Zone. To have another diagnostics check, even if the light Isn't on, This way you know
everything is working properly and its free...This i would not recommended doing your
self..even if you have basic mechanical skills ,this small part controls just about
everything....I hope this helps , good luck....-JB
I am a heavy engine mechanic at a GM Dealership. The CASE relearn procedure is
NOT NOT necessary when the camshaft actuator solenoid is replaced.
A CASE relearn is ONLY required when the crank sensor has been replaced. Dont
waste your money unless you have replaced your crank (CKP) sensor.
Replace the CPAS yourself.  It's simple.  Remove the serpentine belt, remove the three
bolts holding the power steering res and move it out of the way, unbolt the unit and
I can do it in about 20 minutes...
Even after replacing actuator the p0014 still pops back up after a few miles. No change
in engine performance.
With an actual actuator replacement, you may need to do a crank variance relearn. Or
you have another problem, like a worn timing chain.
If the cam actuator goes bad will it make the engine sound like its knocking? There are
three screens on it and one of mine in the middle was clogged up with junk and a little
bit of metal shavings.
No, it will not cause an engine noise. The metal in the
screen is caused by a worn out engine bearing, and the
metal just happens to be caught in that screen.

2006 Chevy Trailblazer ext. Check Engine Light trouble codes  P0014. Replaced idler pulley and oil
change by pep boys. Pennzoil 5w30 at 57222 miles. No prior work done since car was bought in 3/07.
Prior to our ownership it served as a rental car,but not to used.

Question = I'm a soldier deployed in Iraq right now.  My wife told me today that yesterday the truck cut
off 4 times.  Each time it cut off she was at a standstill(traffic light, parked, making a u turn, etc.) and
she went to take off. When she would start it she had to hold the key until it started (apparently on
these new Chevy's all u have 2 do is flick the key and they start now). Then it happened twice today,
again she had to hold the key to start it. Second time she said the engine "putted" a little then started
and it threw a code, so she went to Autozone and had the code read.  They said the code was p0014.  
Said it started to do it a 3rd time so she floored the gas and it did not cut out.  She's not mechanically
inclined. So shes taking it to pep boys today. She doesn't quite trust anyone because my last
deployment she was taken advantage of by mechanics. For hers and my piece of mind what are your
thoughts, ideas, suggestions, about this?  Possible causes, what ! Parts should be checked, possible
troubleshooting?  I am mechanically inclined but i am not familiar with these newer chevy engines,and
I'm in Iraq so i can only tell her if the shop is in the right ballpark or not. Done some info digging and
Ive seen fixes as small as a solenoid replaced to as large as a engine replaced.  Please help.  Thank
you very much.

Answer: See above.
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Cam Actuator Solenoid Codes P0016 and P0014