Question about Chevrolet TrailBlazer

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My 2004 Chevy Trail Blazer (4.2 liter 97K-miles) idles very rough. Computer scan reads, "Cam/Crankshaft Correlation Sensor(s)" Replaced both. Still idles rough. Mechanic thinks it could be timing set?? $$

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The correlation sensors indicate that the crank shaft and cam are in sync your cam could have jumped teeth you need to check all the timing marks if it jumped reset the gears and check your tensioner and replace if needed the piston to valve clearance is not an issue so you shouldn't have bent valves

Posted on May 18, 2011

  • Corey Fortin May 18, 2011

    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 pass. 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

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What are the code numbers so i can trouble shoot

Posted on May 18, 2011

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How do I fix my 2005 trail blazer


Have it checked out , don't guess ! Should have a up scale scan tool , professional one hooked up ! Check fuel trims , mass air flow sensor , coolant temp . etc... Crankshaft position sensor ,do fuel pressure an flow testing etc... Your looking for a quick answer , Test ,Test an more testing ! You best bet is take it to a ASE certified repair shop .

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2006 Chevy Trailblazer started to run rough in idle but only after it warms up. My mechanic got P0017 code on his scan tool and told me I needed to replace the Crankshaf and Camshaft sensors. Both sensors...


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Codes p0014, p0016 and p1810


Code 14 is for a problem with the exhaust cam sensor, code 16 is for a problem with the crank and cam sensor correlation.
Code 1810 is for a problem with a pressure switch, but it is usually inside the transmission and involves the torque converter.

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5.3 liter Chevy engine #1 Cylinder not firing at idle


My opinion...

Year? Miles?

There's no way I'd dive into a "HEAD GASKET"
diagnosis without pressure testing the cooling
system and (wet/dry) COMPRESSION testing
the whole engine...

Even if it is a "HEAD GASKET"... the entire engine
might be ready for a REFRESH... and tossing a new
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Come back with some compression numbers...

but don't bother with any of this if your engine oil has water in it.

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I have a Chevy K1500 with a 5.7L and it started having rough start problems recently. Now when I crank it over it is super rough and "kicks back" and won't start. I tried replacing the crankshaft...


From the information I could gather, you will have to have a dealer reset the sensor. You might call Auto Zone auto parts store and see if they can do it, since they will scan your computer for free. Their scanner may have the capability to reset the sensor.

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2003 cadillac cts 3.2 liter..rough idle, scan tool shows misfire on bank 1, cylinders 1,3,&5. only at idle, scan tool also showed a cam postion sensor code. cam position sensor changed. no change in...


Did you ever find a solution to this? I am having the same issue on 2,4,6. I have replaced the coils. checked the intake for vacuum leaks. I am lost here let me know if you find anything and I will do the same.

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If my crankshaft cencer a & b are bad what would be the car be acting like. It has a 3.5 liter v6 in it.


Bad Idle, stalling, and engine in worst case will not start. The ECM take readings from the crankshaft and camshaft sensor to determine the engine's ignition timing and fuel injector timing.
A total sensor failure will cause the engine not to restart if there is no output reading form the sensor to the ECM. If there is an Auto Zone in your area, they can scan your car to address the issue if your crank/cam shaft sensor has gone bad and will need to be replaced.
Thank you for using fixya and Auto Zone scan free of charge and has the step by step instructions to get the job done.

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A 2004 Dodge stratus with the 4 cylinder that will not start


code p 16 refers to crankshaft position/cam shaft position bank 1 sensor A--correlation====causes ---wiring---CKP sensor ( crankshaft position sensor )---mechanical fault

code p 0340 refers to -camshaft (CMP) sensor A bank 1 circuit malfunction ===causes wiring--CMP sensor--ECM
cosrs nothing to check the timing belt , just remove the oil filler cap and see if the rockers are moving when turning it over
the clue here may be bewteen the 2 codes , the word correlation and circuit malfunction so check the wiring, harness connections for pin corrosion and then substitute the ECM with a know good unit as the correlarion and circuit malfunction could be in the ECM
if the ECM program is not getting good reports for both sensors then it reasons that the piston and cam shaft are not timed properly and so will not allow it to start

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