TiredBirds Posted October 16, 2018 Report Share Posted October 16, 2018 So the other day I got a code P 0021, Camshaft position sensor Bank 2 over advanced... what does that usually mean? I know these 4.4's are a tad noisey. Am I getting detonation? I'm also using puke 87 since gas has shot up to like 3.40/gallon for 93. Should I go back to 93? 99 540i Sport 6 speed 207,000 miles. FWIW all the chains/guides...usual stuff were done at about 190k. Car runs and drives fine. I did just change the oil, but that shouldn't matter. Quote Link to comment Share on other sites More sharing options...
mender Posted October 16, 2018 Report Share Posted October 16, 2018 Most likely a vanos actuator that was a little slow to react. Do you have the freeze frame data? Did you change oil type or brand? Quote Link to comment Share on other sites More sharing options...
Gearhead_42 Posted October 16, 2018 Report Share Posted October 16, 2018 (edited) Ditto the oil weight Q... Run some motor honey or similar through it at next change, use a recommended weight synthetic, might clear things up. Edited October 16, 2018 by Gearhead_42 Quote Link to comment Share on other sites More sharing options...
TiredBirds Posted October 16, 2018 Author Report Share Posted October 16, 2018 47 minutes ago, mender said: Most likely a vanos actuator that was a little slow to react. Do you have the freeze frame data? Did you change oil type or brand? Not sure what the previous owner was running. He did mention a 40 weight, which I thought was a tad high. I used Mobil one 5w30. No freeze frame with this reader. I don't think. I cleared the code and it hasn't come back (2 days appox 60 miles) 41 minutes ago, Gearhead_42 said: Ditto the oil weight Q... Run some motor honey or similar through it at next change, use a recommended weight synthetic, might clear things up. I thought these things didn'y like "motor honey" too much? Or do you mean a "cleaner" Quote Link to comment Share on other sites More sharing options...
Gearhead_42 Posted October 16, 2018 Report Share Posted October 16, 2018 Cleaner, not additive... Sorry. I know BMW loves to say "no additives" but I personally feels that's baloney. The Gunk Synthetic oil system cleaner is awesome stuff, I've also had great results in my bimmers with LiquiMoly brand. Quote Link to comment Share on other sites More sharing options...
TiredBirds Posted October 16, 2018 Author Report Share Posted October 16, 2018 37 minutes ago, Gearhead_42 said: Cleaner, not additive... Sorry. I know BMW loves to say "no additives" but I personally feels that's baloney. The Gunk Synthetic oil system cleaner is awesome stuff, I've also had great results in my bimmers with LiquiMoly brand. Ok my buddy is a Petra distributor I'll see what he has. Quote Link to comment Share on other sites More sharing options...
JBgotM Posted October 17, 2018 Report Share Posted October 17, 2018 On 10/16/2018 at 10:20 AM, TiredBirds said: Not sure what the previous owner was running. He did mention a 40 weight, which I thought was a tad high. Alot of BMW guys like to run the Mobile 1 0W-40. It what I run in my '99 M Roadster. 1 Quote Link to comment Share on other sites More sharing options...
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