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Vanos issue, fault code P0015, P0012, P0022
Hi, first time writing here but read alot here before. Now I´m alittle bit confused and would need a little bit support from someone experienced person.
I have issues with fault codes P0015, P0012, P0022 and engine goes into limp home mode after some spiriting driving.
I would like to mentionen that this is not an original car, it´s an e30 with s62b50 engine. I have built the car in year time. Due to 540 brake servo at the left side there is no room for MAF (mass air flow meter) so i run it in alpha n mode. These modifications should not affect my fault codes according to me but I mention it anyway. I also had issue with broken plastic guide lines for main camshaft chain. Chain and tensioners has been replaced and also all o-rings for both vanos.
At this time I also checked the vanos solenoids for both bank 1 and 2. I checked clicking sound and cleaned the solenoids with MAF cleaner and air. Everyging seemed good with good clicking sound from all eight solenoids.
After rebuilding the engine and running with alpha n mode the engine showed only fault code P0015, camshaft B Position-timing over-retarded. (bank1). I removed vanos solenoids from bank 1 and replaced with a complet set of 4 second hand solenoids including board. After first test run P0015 was gone, and the engine was running like a beast with full power, but I got a new fault code, P0012, camshaft A Position-timing over-retarded. (bank1) and limp home mode after 10 minutes spiriting driving. So I thought that the second hand solenoids had issue with another solenoid. I also suspected that maybe the alpha n mode maybe affected the fault codes so I mounted both MAF without filter and made a new test run. Newer got full power, maybe my MAFs are bad. Now I hade fault code P0022,camshaft A Position-timing over-retarded. (bank2). So now its the other bank that shows fault codes.
When I checked my solenoids during the rebuilt I noticed that the residual gauze filter was broken as many other also have reported. My oil was new just before I started my rebuilt with timing chain and seemed like new so I used it again. Maybe the oil is contaminated from the plastic guide line even if looks very new? Filter for vanos is not replaced. Oil level is at maximum.
Any suggestions are higly appreciated.