DTC P0335, What to check?

[InnoVision]

I had an intermittent problem for a while where the engine would be running fine and then instantly sound like a "shaking a can of marbles". This would not stop until I turned the truck off. When I restarted, the engine would usually sound normal again.

When I pulled the codes I got DTC P0216 & 1214 consistently. Then I started to get DTC P0335 along with the others. It now is apparent that the crankshaft position sensor failure is causing the timing to advance to max.

Some folks have guessed the the DTC P0216 & 1214 codes are a sign of impending IP failure. The engine has 225k miles and the IP was changed under warranty at 120k.

Question is, how should I troubleshoot the DTC P0335? Is this likely a failed sensor or an electrical fault like a bad ground? Where would be the best place to check voltage and ground for the sensor? Someone else said that a bad harmonic balancer could make the sensor act up intermittently too. How can you check that?

Finally, I picked up an OBD-2 Actron Elite AutoScanner Auto Scanner CP9185 because it appeared to read timing info. However, when hooked up the the '96 6.5 TD it doesn't show any timing info. There are several sections that aren't supported on this vehicle. So I'm not sure if it is just not possible on the '96 6.5 TD, or that the scanner doesn't do what it was advertised to do. Does anybody else have this scanner and can they confirm that it won't display timing info.

If I need to replace the injection pump and I need to get a scanner that will work. What scanner will do what I need and not cost a fortune?

Thanks,

Bob

[torque454]

With 105k on that IP its about time for it to die. You really cant get by without an expensive scanner to set the timing. The cheapest thing is to use a laptop computer (or grab a table and setup a desktop computer beside your truck lol) and buy a cable and the software to do it VIA computer. Its been talked about recently but i cant recall the name of it. Its like $200 for the cable.

[Chevylover]

P0216 - Injection Timing Control Circuit

P0335 - CKP Sensor A Circuit Performance

P1214 - Injection Pump Timing Offset


Remove the CPS plug, start the engine and see what happens. If engine runs normal without the "shaking a can of marbles", than i would see, clear the codes and replace the CPS. Also get an tech2 scanner or get the timing checked at a chevy stealer just to clear that it is okay.

Also check all grounds for good connection.


Cu,
Sven