Question about 2001 Chevrolet Silverado 3500

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I have a 2001 Silverado 3500 with a 8.1 motor. The car smokes sometimes and then other times it doesnt. I put the scanner on it and it gave me code P0343 (Camshaft Position Sensor). Will replacing that fix my problem or do I have a craked headgasket or bad injector? Smoke is grey/white color

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Posted on Jan 02, 2017

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SOURCE: 2004 Chevy Silverado HD 2500

On many engines with distributor less ignition systems and sequential fuel injection, a camshaft position sensor is used to keep the engine's control module informed about the relative position of the crankshaft. By monitoring cam position (which allows the control module to determine when the intake and exhaust valves are opening and closing), the control module can use the cam position sensor's input along with that from the crankshaft position sensor to determine which cylinder in the engine's firing sequence is approaching top dead center. This information is then used by the engine control module to synchronize the pulsing of sequential fuel injectors so they match the firing order of the engine. On some applications, input from the camshaft position sensor is also required for ignition timing.
The camshaft position sensor may be magnetic or Hall effect, and mounted on the timing cover over the camshaft gear, on the end of the cylinder head in an overhead cam application, or in a special housing that replaces the distributor (in the case of some of the GM applications). Operation and diagnosis is essentially the same as that for a crankshaft position sensor.  

Re  check the wire harness and the sensor installation to the camshaft sensor in Bank #1 which is where the #1 cylinder is. Good luck and hope this adds some light to you question, keep me posted and be glad to help.

Posted on Jun 02, 2009

  • 540 Answers

SOURCE: I have a 2001 Chevy

sounds like you have an injector going out it usually starts dumping excess fuel on occasion causing excessive smoke you will have to have it diagnosed to pinpoint the cylinder causing the issue

Posted on Nov 12, 2010

  • 9 Answers

SOURCE: 2001 Chevy Venture hard to start and grey smoke.

In the older cars, before all the emission laws added so much electronic garb, black smoke meant a fuel problem and grey smoke indicated a problem with internal engine parts like piston rings. Hope this helps.

Posted on Aug 02, 2012

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