redtom56

[redtom56]

My 2003 GTX Supercharged developed slight intermittent miss. I changed plugs and it ran fine for a few times. Then the miss came back, only more. Check engine light came on and code PO 339 came up (crank signal fault not plausible with cam signal). Any help?

 

[Michael211_2000]

Does it still run at all? Either a sensor is going bad (crankshaft position sensor or camshaft position sensor) or there is a mechanical issue such as a problem with the timing chain.

If you Google "P0339 code SeaDoo" you will come up with results from other's who've experienced this same P code and things they did to resolve theirs. The "P" is the only alpha character it's followed by the 4 digit code starting with a zero btw.

- Michael

 

[Michael211_2000]

Yet another possibility is a cut or grounded wire from either of those 2 sensors... the code description is saying that the sensor position reading for the crank does not match the sensor position reading from the camshaft, which shouldn't be possible since the 2 are linked by the timing chain if 1 turns so does the other in unison. So either a sensor has failed, one of their wires is cut or become grounded (ie. pinched or insulation has rubbed off and it's touching metal such that there is no signal on that wire now), or the camshaft and crankshaft really don't agree (something mechanically has gone wrong such as a timing chain problem or broken timing gear tooth... the 2 shafts are no longer aligned properly for correct operation in this case).

Hope that helps some.

- Michael

 

[redtom56]

Yes the ski is still running. Starts and runs good at idle speed. Starts missing at mid-throttle.

 

[Michael211_2000]

It's either a bad sensor or damaged sensor wire then I'd imagine. I have no other ideas.

- Michael