Exhaust Cam Reference

[IMEANX5]

2010 X5M continues to go into low power mode and set check engine light . Replace bank 2 exhaust cam sensor , pulled both cam solenoids (which were clean). Where to look now? timing?timing chain? exhaust cam gear ?

[Sophisticated Redneck]

Originally Posted by IMEANX5

2010 X5M continues to go into low power mode and set check engine light . Replace bank 2 exhaust cam sensor , pulled both cam solenoids (which were clean). Where to look now? timing?timing chain? exhaust cam gear ?

Get ISTA a run the test program for the VANOS solenoids, Replace your solenoids if they are out of spec (which I bet they are), you can't judge them just by their looks. Mine looked spotless and brand new, I got vanos codes, replaced the solenoids and fixed issues.

Other possibility is busted timing chain guides if VANOS tests are good, pull your lower pan (you should do that anyway to check your oil pump chain, I made a video of it and posted up here) and if the chain guides are bad, you will find plastic debris in bottom of pan.

Last possiblity is bad timing adjuster, they cost 500 each and are a pain to replace (about 15 hours of labor) but they rarley go bad so save that for last

[IMEANX5]

Thanks ! I guess I should have stated im getting a exhaust cam reference code on bank 2 exhaust cam.... only one day then its a correlation code the next and sometimes synchronization code ..... all on bank 2 exhaust cam . putting it in low power mode..... this is driving me insane