![]() ![]() Why is P0017 showing so quick? P0017 is a cam/crank correlation between exhaust cam and crank. This shows the computer sees the data from the sensors and that both sensors are working perfectly. When viewed side by side and revving engine up and down, the counts are identical. If comparing intake to exhaust, they should both count equally at the same rate side by side as intake and exhaust spin at same RPM. Counting up to 250, then resetting to 0, and starts over. When the engine is running the scanner can see the counts of each sensor. They both seem to be working fine as well. The last thing I can think to add is the position sensors. When I turn valves on, the computer sees them turning on, and same with off. ![]() When running these tests on both intake and exhaust, they both seem to be working fine. This test just turns the valves on or off. Again only have a few seconds as the P0017 is instantly pending upon rest(i think this is a permanent code?). Almost as if the computer would not take my command at all. But the computer would not command 5*, it did not desire 5* and was in actual 0*. The exhaust on the other hand just didn't listen to my commands. I can command the intake from 0*-25* and it did all of them(5* incriments). And being P0017 is pending almost immediately, I have only a few seconds to test. I didn't have much luck because the computer kicks you out of tests when there is a pending CEL. You can command a phased * and the computer will do it. I ran all this date with CEL on and also with resetting CEL, results were the same. ![]() Intake would change constantly but all matched(desired, commanded, actual). No matter what revving I do, no matter what brake and drive revving I did I could not get exhaust to change. Desired is at 0*, the commanded is at 0*, and the actual is at 0*. The desire position is 5*, the commanded position is 5* and the actual position is 5*. I then went and viewed live data while engine runs. Took a dozen or so computer resets to get the relearn to work and hit fuel cut off. We tried to do a cam/crank relearn but would NOT hit fuel cut off. I went to my mechanic and used his scan tool(Much nicer then mine). And shortly after(few minutes of idle or 1/4 mile drive) it sets and is on. P0017 is an instant pending code upon restart. And still afterwards I have P0017.Īfter timing chain and computer reset. Again checked it 17 times this time, have pictures. The last Lobe on the camshaft is inline with a "seam" line from manufacturing, which looks like its supposed to be offset 3ish* counterclockwise from a notch on the ring, where mine looks to be more inline. I have attached a picture of the ring to show what I am talking about. I read this can possibly slip according to a TSB(however never found anyone ever saying they did have one slip), and cause your exhaust to be read as if it were not timed right. One other thing I made note of., but not 100% if its an issue, is the reluctor ring on the exhaust CAM. Upon removal of the old solenoids, the center screens had a layer of plastic shavings(likely from the front guide being ground away from chain). Upon opening cover I found all large pieces of the front guide, so don't think I have any pieces in the pickup. Engine has significantly more power, not 100% though. Took pictures of my timing marks after checking for idk. Over time engine became sluggish.įinally got into the engine to replace Balance chain, guides, tensioner and timing chain, guides, tensioner, Phasers and solenoids, gaskets(All items ACDELCO). However in the coming weeks the engine just kept randomly clunking at idle(guides breaking apart) and would return to normal. This is also the time the CEL came on for P0016 and P0017. This is when i realized I really needed to watch oil level through oil changes. I KNOW my last oil change wasn't counted wrong as I specifically bought a 5qt oil jug instead of my 6 gallon box I normally buy. Made it another mile to the gas station and added 3 qts of oil. Hard for me to track how much come out cause it dumps into a 20qt container.Ībout 9 months later we are driving down the highway and engine lost power for a split second then regained it then continues driving fine for the last mile to the exit. The next few oil changes I did at 3k miles each. Assumed I did a bad oil change at home and counted quarts wrong and was low as there are no obvious signs of oil leaks or oil burning. Brough it to my mechanic and he said low on oil. Last year I had some timing chain noise on start up. To start I have a 2015 Equinox with a 2.4L with 140K miles. Hi All! Read through a few posts, but still cant quote find an answer for my issue. ![]()
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