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Old 05-22-2009, 02:24 AM   #1
H-Dogg
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Default P0340 ses code

I searched threads for anything about this code and I followed everyone's advice, I replaced the spark plugs with copper ones, got new plug wires, and cleaned up the piece behind the coil packs. This fixed the problem for a day but the ses light was still on and it's slowly starting to go back to how it ran before. What's my next move?

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Old 05-22-2009, 03:08 AM   #2
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2003 L-Series 3.0L Sedan
Default Re: P0340 ses code

DTC P0340 Camshaft Position (CMP) Sensor Circuit

And there aren't any other codes? Have you scanned fo any new codes? You can always pull the PCM fuse to reset the codes and try again. Wait 5-10 seconds before putting the fuse back in. Get the code(s) read again if they pop up.

If there's misfiring with the ignition system, the coils and ignition module that the coils sit on need to be cleaned so good electrical contact is made to the blades and ground. The mounting bolts need wirebrushing to clean off corrosion as they serve to ground the ignition system. Use dielectric grease on the coil towers for light lube and corrosion prevention. Regular grease to coat the bolts as a cheap corrosion prevention.

Be sure there aren't any new error codes if the SES light turns on again by re-scanning.

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