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Old 05-15-2012, 02:27 PM   #1
burble city
gotcurry's Avatar
Join Date: Oct 2008
Location: Toronto
Posts: 441
Angry CEL P1550 and P0505 help

CEL came on yesterday. I was at a red light and car just died. I turned it on and it died again.. i noticed the rpms were dropping so i gave it some gas and it seemed fine.. after driving around noticed the CEL and rpms were fine. Got home and scanned the car and got code p1550. Cleared the code and drove around and car seemed to drive just fine.. This morning started the car and started driving, CEL came back on but this time car was idling at around 1000 RPM. I let it idle for a bit and noticed that 1 or 2 times it rev'd up to 2500 rpm by it self and would come back down to 1000rpm. Frustrated, i scanned the car again and got codes "P1550 Idle Speed Control valve Closing Solenoid Control Circuit Electrical" AND " P0505 Idle Air Control System malfunction".
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Old 05-16-2012, 01:30 AM   #2
5th Gear Member
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Join Date: Oct 2009
Location: Toronto, Ontario, Canada
Posts: 936
maybe MAF or ICV... vaccum leak.... but first i would spray some throttle body cleaner n see if it works!
e39 M5 (s62)- Muffler Delete, Timmay Tips,
e30 325ic - Hard Top, Matte Black
e36 328is - (m52)AA S/c'd, M50 Mani, 3.23 LSD, M3 Brakes, Zimmer rotors, hps pads, Racing Dynamic Strut Bar, Depos, m3 Bumper, Intake, Spal fan, poly RTABs, Eibach Swaybars, Koni yellow, Mishimoto Rad, Silicone hose, Alumi T-housing, Depo w/LED Angels, LED tails, 12' Alpine Type R, Suede head liner, LTW Low rise spoiler
92' 325is (m52) - M3 conversion AA S/c'd
'97 Euro Estroil E36 M3 Vert (S50B32)
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