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Old 05-14-2011, 12:20 PM
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Another new DTC today....

Checked the codes using my Edge Insight and had a new code. P0340 some kind of cam position sensor. So what causes this and what does it mean. If this is a sign of a problem what is it and what is the fix.
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Old 05-14-2011, 03:00 PM
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I believe P0340 is strictly a circuit code for the camshaft position sensor. You are probably going to need a CMP but it would be wise to check the circuits also
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Old 05-14-2011, 04:06 PM
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I guess I'll show my ignorance. What do you mean by check the circuits. What do I do to check them.
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Old 05-14-2011, 05:19 PM
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First, check the connector and see if it is oil soaked.
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Old 05-14-2011, 07:14 PM
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When my head gaskets got done the harness disintegrated in the tech's hands, check the harness before replacing the sensor.
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Old 05-14-2011, 07:18 PM
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What kind of crank time are you having? It can set that code for excessive cranking and not have a problem with the sensor.
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Old 05-14-2011, 07:36 PM
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The resistance spec is 800 to 1100 ohms, if you're checking with a DVOM. I would check across the two cavities of the PCM connector directly first. If this checks out good, you could voltage drop test the circuit by disconnecting the connector from the CMP sensor first, and plugging in a big light bulb (be careful not to damage the pins of the connector) and then connect a battery on the PCM connector for the CMP circuit. For what it's worth, this circuit CANNOT be repaired or overlaid because it is ground shielded, so if you find a problem with this circuit, be prepared to replace the entire engine harness itself. I've already replaced MANY, including one on an E-Series this last three days.
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Old 05-14-2011, 11:29 PM
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To answer the question about crank time I would say it's usually around three to four seconds. I'm gonna check the connection today if it will quit raining long enough.
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Old 05-15-2011, 10:40 AM
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Been doing a little research and am a little confused about which cam sensor I need. I've seen people talking about a black sensor and a gray sensor. What is the difference and which one do I need.
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Old 05-15-2011, 08:05 PM
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7.3L DIT originally had a black sensor, they were recalled and replaced with a gray sensor

you need one for a 6.0L
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